HP ZBook 14u G4 Mobile Workstation Bedienungsanleitung

HP ZBook 14u G4 Mobile WorkstationMaintenance and Service Guide

Diagnostics error messages ... 103BIOS password ...

Table 8-6 System diagnostics failure codes and user actions (continued)BIOS Application BIOS Application Error 501 The BIOS installation may have bec

●Example: System board needs replacement. When (1) system 3.3V exists, but one power rail is bad then (2) power good is low (0V), and troubleshooting

4. Unplug the AC adapter from the computer.5. Press and hold the power button for at least 15 seconds to drain residual power.6. Reconnect the battery

●Reseating the keyboard cable can resolve an unrecognized keys error.●Reseating the wireless module and antenna cable can resolve a wireless connectio

NOTE: After the service door is removed, disconnect all connections (internal keyboard, display, discrete GPU, hard drive/solid-state drive, daughterb

NOTE: Most of the time, eective troubleshooting can prevent a system board replacement.Items that may prevent resolution of the issue:●The informatio

7. Be sure that the boot option is set to a working operating system drive.8. Be sure that externally connected monitors are turned on and their power

●Product model name and number●Product identication number●Applicable error messages●Add-on boards or hardware●Third-party hardware or software●Opera

●Check power light (7. Status lights, blinking light codes, troubleshooting lights, and POST error messages on page 86). Rear power light indicates ex

2. If there is still no boot, replace system board.Tips and tricks Computer automatically boots without pressing power button when RTC 3V battery has

Read-write error ... 130Slow performance ...

AC adapter issue SolutionSymptoms●No sign of power●No boot●No rear power light●No front power light●Battery does not charge when AC adapter is connec

Troubleshooting stepsVisual inspections1. Inspect battery connectors for any signs of damage.2. Verify that battery is installed properly in battery

Battery discharges too fast SymptomsBattery has good status light but discharges too fastPossible causesAC adapter and/or battery.Troubleshooting st

Burnt smell SymptomsEmits smoke, burnt smellPossible causesDefective on-board components. Troubleshooting stepsGeneral visual inspection1. Disconne

5. If external video is OK, update BIOS, software, and drivers (4. Update BIOS and drivers on page 81) and perform soft reset (9. Soft reset (Default

Diagnostics error messages Symptoms●Computer has power●POST error message displays (Windows logo has not yet appeared)Possible causesDiagnostic erro

BIOS password SymptomsSome sections are unavailable (grayed out)Possible causesBIOS administration password is required. Troubleshooting steps1. Re

Intermittent shutdown Symptoms●Shutdown during startup●Shutdown during operationPossible causesIt is often dicult to troubleshoot an intermittent i

Hardware related issue1. Check for any signs of loose connections, bent pins, stray wires, dust, nearly faulty parts (bulging/leaking capacitor).2.

4. Run HP Hardware Diagnostics (6. HP Hardware Diagnostics and Tools on page 82) to isolate major faulty hardware issues.●HP PC Hardware Diagnostics (

Changing the boot order using the f9 prompt ... 153TPM BIOS settings (sel

Freeze at Windows Logo (hang/lockup) Symptoms●Has power, light activity, fan spinning●HP Logo displays briey●Attempt to boot to operating system an

a. Roll back to previous version may be necessary.b. Go to safe mode to install drivers.4. Run Hardware Diagnostics (6. HP Hardware Diagnostics and To

4. Screen saver is set. Press any key or touch TouchPad to resume.5. Verify that Display Choice is set to external video only. Toggle screen control k

Unresponsive SymptomUnresponsivePossible causesProgram in use has stopped responding to commands. Troubleshooting steps1. If possible, use the Wind

HP Smart Adapter warning message SymptomWarning message displayed in WindowPossible causesLess powerful AC adapter, BIOS out of date. Troubleshoot

DisplayDisplay anomaliesThe display panel is a eld replaceable unit (FRU) and must be replaced by only authorized technicians. However, HP highly rec

Quick check●Visually examine the display for cracked screen, liquid crystal leak, dirty spots on glass, etc.●Reset and update BIOS and docking rmware

Display assembly diagramThe display assembly diagram shows basic video components: system board, graphics cards, display cables, display connectors, o

No video (external) SymptomNo image on external monitorPossible causesExternal monitor, resolution, display conguration, drivers.Troubleshooting st

No or bad external video via docking SymptomsNo or bad image on external monitor via ports of docking station (VGA, DP, TB, display port, etc.)Possi

1 Product descriptionCategory DescriptionProduct Name HP ZBook 14u G4 Mobile WorkstationProcessors 7th-generation Intel® Core™ processors:Intel Core i

Be sure that external display cables have good connection at both ends (system board and display panel).●If moving cables aects the image, it is disp

I/O devicesNOTE:●Make sure external devices are supported and compliant (i.e., USB Type C, Thunderbolt 3, PCI Express, etc).●If you have problems with

Keyboard point stick SymptomPoint stick not working properlyPossible causesDust trapped under point stick, loose point stick cap. Troubleshooting s

TouchPad SymptomsNot working properlyPossible causesOn/O enabled, driver, settings.(1) – Touchpad on/o button(2) – TouchpadTroubleshooting steps1.

7. Test with HP Support Assistant in Windows.8. Diagnose with HP PC Hardware Diagnostics (UEFI) to isolate a hardware issue from a software issue.9. E

point. If disabling U-APSD improves the throughput issue, check with the access point provider for updated rmware that resolves the issue.11. Test wi

USB Symptoms●USB devices are not recognized●USB devices are not chargingPossible causesUSB devices do not have the latest software drivers, port ins

Smart card reader Symptoms●Not recognized●Unable to writePossible causesPhysical damage, incorrect insertion, dirt, driver, malfunctioning card read

Speaker, headphone - audio issues Symptoms●No sound from external or internal speakers●Distorted sound, too soft, too loud, intermittentPossible cau

Thunderbolt (TB) SymptomThunderbolt device not workingPossible causesBIOS, drivers, and user settings. Troubleshooting steps1. Update to the latest

Category DescriptionM.2 solid-state drives (2280, NGFF):●1 TB, PCIe, NVMe, MLC●512 GB, PCIe, Gen3×4, SS/DS, NVMe, MLC●512 GB, PCIe, Gen3×4, SS, NVMe,

StorageNOTE:●Back up all critical data prior to drive troubleshooting.●Prior to contacting support, HP recommends that you run a drive (HDD, SSD, M.2

Hard drive/solid-state drive not recognized SymptomHard drive is not recognized during POSTPossible causesLoose connection, faulty hard drive, fault

Read-write error Symptoms●Post error message (i.e., error code 301)●Hang when working on data, les, documentsPossible causesLoose connection, fault

Noisy hard driveIMPORTANT: An SSD has no moving parts, so it does not make loud or clicking noise.Depending on type and rotational speed, some hard dr

MechanicalFan error message - 90B SymptomsFan error 90B at bootCAUTION: May lead to system shutdown, data loss or possible system damage.Possible ca

See Reducing Heat Inside the PC to Prevent Overheating.Noise (sound) SymptomsComputer emits abnormal noisePossible causesAside from basic components

Fan runs constantly Symptoms●Fan never stops running●Generates heat●Decreased computer performancePossible causes●BIOS not up to date.●Thermal condi

Thermal shutdown (hot) SymptomsSimilar to fan runs constantly issue (Fan runs constantly on page 134)●System shutdown●Abnormal heat●Continually runn

Additional informationThe following sections provide additional information that can be used during the troubleshooting process.AcronymsThe following

Blinking lights and boot error codesThe information below is from the white paper HP Business Notebook and Desktop PC F10 Setup, 2014 Business PC mode

Category DescriptionWWAN:Integrated wireless wide area network (WWAN) options by way of wireless moduleTwo WWAN antennas (world wide 5 band, congured

NOTE: The computer will attempt to notify you of this problem through a series of blinking lights. When you attempt to turn on the computer from an “O

Sure Start has identied a problem (Manual Recovery Policy Set)This computer has experienced a problem in locating a valid BIOS image, resulting in a

Hard Disk Test Hard Disk 1 Full 305 The hard drive may have failed. Contact support for assistance.Hard Disk Test Hard Disk 2 Full 306 The hard drive

Routine Maintenance for Performance ImprovementSee HP Notebook PCs - Improving the Performance of Your Computer.The following table presents a summary

Microsoft general troubleshooting of Windows bug check codes●If you recently added hardware to the system, try removing or replacing it. Or check with

Windows Software Development Kit (SDK)1. Download the SDK from the following link:https://msdn.microsoft.com/en-us/windows/desktop/bg162891.aspx2. Set

4. Run the SDK as an administrator.5. Set the symbol path. Select File > Symbol File Path.●In the Symbol path box, type SRV*C:\Windows\symbol_cache

6. Open the crash dump le.Additional information 145

7. Analyze the le. In the following memory dump sample, look for Bug Check 0x3B. The ATIKMAG driver needs to be investigated for further root cause.L

Display Issue: Pixel AnomaliesAll HP notebook displays adhere to strict quality and reliability specications. A small percentage of display panels ma

Category DescriptionSecurity Security lockFingerprint readerSupports “no ngerprint reader” optionSupports Trusted Platform Module (TPM) 2.0 (1.2 down

Cable managementProper routing of the internal cables is critical to the operation of the computer. Follow good cable management practices when removi

Connector typesIMPORTANT: Connector pins and connector gold ngers should not be touched directly with bare hands.There are several dierent types of

Multi-pin horizontal insert connector (LVDS cable to display panel)Insert procedure:1. Slide connector evenly into receptacle on same horizontal plane

9 Computer Setup (BIOS), TPM, and HP Sure StartUsing Computer SetupComputer Setup, or Basic Input/Output System (BIOS), controls communication between

To return all settings in Computer Setup to the values that were set at the factory, follow these steps:1. Start Computer Setup. See Starting Computer

Downloading a BIOS updateCAUTION: To reduce the risk of damage to the computer or an unsuccessful installation, download and install a BIOS update onl

●Turn on or restart the computer, and when the HP logo appears, press f9 to enter the Boot Device Options menu.2. Select a boot device, then press ent

10 Using HP PC Hardware Diagnostics (UEFI)HP PC Hardware Diagnostics is a Unied Extensible Firmware Interface (UEFI) that allows you to run diagnosti

3. Enter the product name or number.– or –Select Identify now to let HP automatically detect your product.4. Select your computer, and then select you

11 Backup and recoveryThis chapter provides information about the following processes. The information in the chapter is standard procedure for most p

2 External component identicationRightComponent Description(1) USB Type-C basic When the computer is on, connects and charges a USB device that has a

You can use Windows tools to create system restore points and create backups of personal information, see Using Windows tools on page 158.●If your com

Restore and recoveryThere are several options for recovering your system. Choose the method that best matches your situation and level of expertise:IM

website. Go to http://www.hp.com/support, select your country or region, and follow the on-screen instructions.IMPORTANT: HP Recovery Manager does not

1. If possible, back up all personal les.2. Insert the HP Recovery media, and then restart the computer.NOTE: If the computer does not automatically

Removing the HP Recovery partition (select products only)HP Recovery Manager software allows you to remove the HP Recovery partition to free up hard d

12 SpecicationsComputer specications Metric U.S.DimensionsLength 237.0 mm 9.3 inWidth 338.0 mm 13.3 inHeight (front to rear) 18.9 - 20.2 mm 0.74 -

35.6-cm (14.0-in) display specications Metric U.S.Active diagonal size 35.6-cm 14.0-inResolution HD: 1366x768FHD: 1920x1080QHD: 2560x1440Surface tre

Hard drive specications 1-TB* 500-GB* 500-GB* hybridDimensionsHeight 9.5 mm 7.0 mm 7.0 mmWidth 70 mm 70 mm 70 mmWeight 115 g 101 g or 95 g 95 gInter

13 Power cord set requirementsThe wide-range input feature of the computer permits it to operate from any line voltage from 100 to 120 volts AC, or fr

Country/region Accredited agency Applicable note numberSweden SEMKO 1Switzerland SEV 1Taiwan BSMI 4The United Kingdom BSI 1The United States UL 21. Th

Component DescriptionNOTE: When a device is connected to the jack, the computer speakers are disabled.(5) USB 3.x port Connects a USB device, such as

14 Statement of memory volatilityThe purpose of this chapter is to provide general information regarding nonvolatile memory in HP Business PCs. This c

g. If a DriveLock password is set, select the Security menu, and scroll down to Hard Drive Utilities under the Utilities menu. Select Hard Drive Utili

NOTE: If the system has a BIOS administrator password, enter the password at the prompt.a. Select Main, select Restore Defaults, and then select Yes t

NOTE: The amount of time it takes for Disk Sanitizer to run can take several hours. Plug the computer into an AC outlet before starting.a. Turn on or

Nonvolatile Memory Type Amount (Size)Does this memory store customer data?Does this memory retain data when power is removed?What is the purpose of th

Nonvolatile Memory Type Amount (Size)Does this memory store customer data?Does this memory retain data when power is removed?What is the purpose of th

4. What kind of conguration data is stored on the DIMM Serial Presence Detect (SPD) memory module? How would this data be written?The DIMM SPD memory

15 RecyclingWhen a non-rechargeable or rechargeable battery has reached the end of its useful life, do not dispose of the battery in general household

IndexSymbols/Numerics`product descriptionethernet 2AAC adapter, spare part numbers 22antennasdisconnecting 40, 42audible codes 74audio, product descri

hingesspare part number 19hot keysmicrophone mute 12Sleep 12switching screen image 12using 12HP PC Hardware Diagnostics (UEFI)using 155HP Recovery Man

DisplayComponent Description(1) WLAN antennas* (2)(internal) Send and receive wireless signals to communicate with wireless local area networks (WLANs

power requirements 3primary storage 1processors 1product name 1security 4serviceability 4video 2wireless networking 2product name 1product name and nu

WLAN/Bluetooth combo cardremoval 40spare part number 18, 40WWAN antennaspare part number 20WWAN antennas, identifying 7WWAN moduleremoval 42spare part

© Copyright 2017 HP Development Company, L.P.AMD and AMD Radeon are trademarks of Advanced Micro Devices, Inc. Bluetooth is a trademark owned by its p

TopTouchPadComponent Description(1) Pointing stick Moves the pointer on the screen.(2) Left pointing stick button Functions like the left button o

LightsComponent Description(1) Power light ●On: The computer is on.●Blinking: The computer is in the Sleep state, a power-saving state. The computer s

Buttons, speakers, and ngerprint readerComponent Description(1) Power button●When the computer is o, press the button to turn on the computer.●When

Component Description(4) Volume mute button Mutes and restores speaker sound.(5) Fingerprint reader (select products only)Allows a ngerprint logon

Using the hot keysTo use a hot key:▲Press the fn key, and then press one of the keys listed in the following table.Press fn+function key DescriptionIn

BottomComponent Description(1) Docking connectors (2) Connect an optional docking device.(2) Vents (2) Enable airow to cool internal components.N

FrontComponent Description(1) Wireless light On: An integrated wireless device, such as a wireless local area network (WLAN) device and/or a Bluetoot

LabelsThe labels laser etched on the computer provide information you may need when you troubleshoot system problems or travel internationally with th

3 Illustrated parts catalogComputer major componentsNOTE: HP continually improves and changes product parts. For complete and current information on s

NOTE: Details about your computer, including model, serial number, product key, and length of warranty, are on the service tag at the bottom of your c

Important Notice about Customer Self-Repair PartsCAUTION: Your computer includes Customer Self-Repair parts and parts that should only be accessed by

Item Component Spare part number 16-GB 865396-850(16) WWAN module HP lt4120 LTE/EVDO/HSPA+ SnapdragonT X5 LTE Mobile Broadband Module 800870-001 Hu

Display assembly subcomponentsItem Component Spare part number(1) Bezel 821160-001(2) Camera module (includes microphone) 942402-001 Microphone modul

Item Component Spare part number(7) WLAN antenna (spared with display enclosure)(8) WWAN antenna (spared with display enclosure)(9) Display enclosure

Mass storage devicesItem Component Spare part number(1) Hard drive, 7 mm 1 TB, 5400 rpm 762990-001 500 GB, 7200 rpm, FIPS 820572-001 500 GB, 7200 r

Cable KitItem Description Spare part number Cable Kit 937300-001(1) Display/camera cable(2) Card reader cableMiscellaneous partsComponent Spare part

Component Spare part numberThailand 285096-001United Kingdom and Singapore 213351-001Power cord (3-pin, black, 1.0 m): Argentina 401300-007Australia

4 Removal and replacement procedures preliminary requirementsTools requiredYou will need the following tools to complete the removal and replacement p

Cables and connectorsCAUTION: When servicing the computer, be sure that cables are placed in their proper locations during the reassembly process. Imp

Grounding guidelinesElectrostatic discharge damageElectronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure

Packaging and transporting guidelinesFollow these grounding guidelines when packaging and transporting equipment:●To avoid hand contact, transport pro

iv Important Notice about Customer Self-Repair Parts

Equipment guidelinesGrounding equipment must include either a wrist strap or a foot strap at a grounded workstation.●When seated, wear a wrist strap c

5 Removal and replacement procedures for Customer Self-Repair partsThis chapter provides removal and replacement procedures for Customer Self-Repair p

2. Remove the 10 rubber screw covers and the SD card reader blank from the bottom cover.3. Remove the 10 Phillips M2.5x5.0 screws (1) - (10) and the P

4. Lift the bottom cover o the computer by lifting the rear of the cover near the hinges and tilting the cover up.NOTE: The RJ-45 door can be removed

NOTE: There are ve dierent sizes of rubber screw covers. Be sure that you reinstall them over the correct screws, as shown in the following images.T

2. Use a small plastic rod or the soft part of your nger (not a ngernail) to ensure compaction into the recess.3. Visually inspect all rubber caps t

BatteryDescription Spare part numberBattery, 3-cell, 51 WHr, 4.42 Ah 854108-850Before removing the battery, follow these steps:1. Shut down the comput

Hard driveDescription Spare part number1 TB, 5400 rpm, 7 mm 762990-001500 GB, 7200 rpm, 7 mm, FIPS 820572-001500 GB, 7200 rpm, 7 mm, Opal-2 820573-001

4. To remove the hard drive cover from the hard drive, remove the 4 Phillips M3.0×3.0 screws (1) that secure the cover to the drive, and then lift the

Solid-state drive (SSD)Description Spare part number1 TB, PCIe, Gen3×4, NVMe, MLC 937005-001512 GB, PCIe, Gen3×4, SS/DS, Self-encrypting Drive (SED),

Safety warning noticeWARNING! To reduce the possibility of heat-related injuries or of overheating the device, do not place the device directly on you

Memory modulesNOTE: Primary and expansion memory is installed in a side-by-side conguration in the bottom of the computer.If only one memory module i

2. Remove the memory module (2) by pulling the module away from the slot at an angle.NOTE: Memory modules are designed with a notch to prevent incorre

WLAN/Bluetooth combo cardThe computer uses a card that provides both WLAN and Bluetooth functionality.The WLAN module and WWAN module are not intercha

3. Remove the WLAN module by pulling the module away from the slot at an angle (3).NOTE: WLAN modules are designed with a notch to prevent incorrect i

WWAN moduleThe WLAN module and WWAN module are not interchangeable.The WWAN module is available on select models only.Description Spare part numberHP

4. Remove the WWAN module (3) by pulling the module away from the slot at an angle.NOTE: WWAN modules are designed with a notch to prevent incorrect i

KeyboardIn this section, the rst table provides the main spare part number for the keyboards. The second table provides the country codes.Description

1. Position the computer upside down.2. Remove the 2 Phillips M2.5×5.0 screws that secure the keyboard to the computer (1).NOTE: The screws are labele

10. Remove the keyboard (8).Reverse this procedure to install the keyboard.46 Chapter 5 Removal and replacement procedures for Customer Self-Repair

6 Removal and replacement procedures for Authorized Service Provider partsThis chapter provides removal and replacement procedures for Authorized Serv

vi Safety warning notice

RTC batteryDescription Spare part numberRTC battery 914384-001Before removing the RTC battery, follow these steps:1. Shut down the computer. If you ar

Internal base plateDescription Spare part numberInternal base plate 937113-001Before removing the internal base plate, follow these steps:1. Shut down

2. Remove the 7 Phillips M2.5x5.0 screws that secure the internal base plate to the computer.3. Lift the tape and remove the antenna cables from the b

Heat sink/fan assemblyNOTE: The heat sink/fan assembly spare part kit includes replacement thermal material.Description Spare part numberHeat sink/the

NOTE: The thermal material must be thoroughly cleaned from the surfaces of the heat sink and the system board components each time the heat sink is re

Fingerprint reader assemblyDescription Spare part numberFingerprint reader assembly (includes cable) 937301-001Before removing the ngerprint reader a

6. Remove the ngerprint reader board and cable assembly from the computer (3).Reverse this procedure to install the ngerprint reader assembly.54 Cha

Touchpad boardDescription Spare part numberTouchpad board without NFC antenna 937307-001Touchpad board with NFC antenna 937308-001Before removing the

NFC moduleDescription Spare part numberNFC (Near Field Communication) module (includes NFC cable, antenna cable, Mylar insulator, and foam) 937302-001

Smart card reader boardDescription Spare part numberSmart card reader board 914380-001Smart card reader cable (available in Cable Kit) 937300-001 (Cab

Table of contents1 Product description ...

5. Pull the plastic tab on the side of the card reader board to disengage the board (5), use a thin tool to pry up the side of board (near touchpad) (

USB/audio boardDescription Spare part numberUSB/audio board 916922-001Before removing the USB/audio board, follow these steps:1. Shut down the compute

System boardNOTE: All system board spare part kits include replacement thermal material.All system boards use the following part numbers:xxxxxx-001: N

2. Disconnect the card reader cable (1) and the ngerprint reader cable (2) from the system board.3. Close the computer and position it upside down.Co

4. Disconnect the following cables from the system board:(1) Speaker cable(2) Display cable(3) Touch cable(4) Power button board cable(5) USB/audio bo

Speaker assemblyDescription Spare part numberSpeaker assembly (includes cable) 937306-001Before removing the speaker assembly, follow these steps:1. T

Display assemblyDescription Spare part numberDisplay panel assembly, touch screenNOTE: Touch screen display assemblies are spared only as whole unit h

3. Lift the display assembly straight up and remove it (2).CAUTION: When installing the display assembly, be sure that the wireless antenna cables are

5. Remove the display bezel (4).The display bezel is available using spare part number 821160-001.6. If it is necessary to replace the camera or micro

7. If it is necessary to remove the display panel from the enclosure, remove the 4 Phillips M2.0×2.0 screws that secure the panel to the display enclo

5 Removal and replacement procedures for Customer Self-Repair parts ... 29Component replace

9. Remove the display panel from the enclosure (3).10. If it is necessary to replace the display covers or hinges, remove the Phillips M2.0×3.0 screw

12. If it is necessary to replace the display/camera cable, lift the display/camera cable assembly (1) from the routing path on the side of the displa

14. If it is necessary to replace the WWAN antenna cables, peel the transceivers from the top of the display enclosure (1), remove the antenna cables

Power button boardDescription Spare part numberPower button board assembly 914382-001Before removing the power button board, follow these steps:1. Shu

4. Rotate the connector side of board upward (4), and then remove it from the computer (5).Reverse this procedure to install the power button board.72

Top coverDescription Spare part numberTop cover 937111-001The top cover remains after removing all other spared parts from the computer.Component repl

7 Interpreting system validation diagnostic front panel LEDs and audible codesDuring the system validation phase that occurs at system startup, the BI

The red LED blinks to represent the major error category (long blinks). The white LED blinks to represent the minor error category (short blinks). For

8 Troubleshooting guideThis chapter is primarily focused on troubleshooting HP Mobile Workstations and HP Notebooks. The information is provided so th

ResourcesHP Resource Tool Description LinkHP Elite Support Provides live HP Premium support (available 24/7) to Elite computers.http://www8.hp.com/us/

Remotely deploying BIOS and drivers ... 81Analyze the issue ...

Identify the issue1. Understand the issueIt is important to understand the issue that occurred, including related symptoms. It helps to understand the

A single symptom can be listed under dierent groups. For example, No Video can belong to (1) Power-on or (4) Display; but Flickering when powered sho

Failure classication by hardware devices and mechanicalTable 8-4 Failure classication by hardware devices and mechanical4. Display 5. I/O devices 6

3. Perform a visual inspection of hardwareIt is important to do a visual inspection of the hardware itself. Perform physical inspection of the compute

6. HP Hardware Diagnostics and ToolsHP oers dierent diagnostics and tools to diagnose hardware failure. This section describes how to use some of th

2. When the diagnostic tool opens, use the keyboard arrow keys to select the type of diagnostic test you want to run, and then follow the on-screen in

HP Support Assistant (HPSA)HP Support Assistant (HPSA) helps you maintain peak performance and resolve problems through automatic updates, built-in di

HP BIOS Conguration Utility (BCU)HP BCU is a free utility that captures the BIOS settings and their values. This tool provides a text le of the comp

7. Status lights, blinking light codes, troubleshooting lights, and POST error messagesCarefully observe any behavior the computer may be exhibiting:

Blinking light codesDuring startup, the computer may not boot properly. If this occurs, blinking light codes that will help identify what is causing t