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HP EliteOne 800 Maintenance & Service Guide HP EliteOne 800 G1 All-in-One - Page 197

Activity, Beeps, Possible Cause, Recommended Action, Red Power LED flashes eight

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Activity Red Power LED flashes four times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Red Power LED flashes five times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Red Power LED flashes six times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Red Power LED flashes seven times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Red Power LED flashes eight times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Beeps 4 5 6 7 8 Possible Cause Power failure (power supply is overloaded). Pre-video memory error. Pre-video graphics error. System board failure (ROM detected failure prior to video). Recommended Action 1. Open the hood and ensure the 4 or 6-wire power supply cable is seated into the connector on the system board. 2. Check if a device is causing the problem by removing ALL attached devices. Power on the system. If the system enters the POST, then power off and replace one device at a time and repeat this procedure until failure occurs. Replace the device that is causing the failure. Continue adding devices one at a time to ensure all devices are functioning properly. 3. Replace the power supply. 4. Replace the system board. CAUTION: To avoid damage to the DIMMs or the system board, you must unplug the computer power cord before attempting to reseat, install, or remove a DIMM module. 1. Reseat DIMMs. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. For systems with a graphics card: 1. Reseat the graphics card. 2. Replace the graphics card. 3. Replace the system board. For systems with integrated graphics, replace the system board. Replace the system board. Invalid ROM based on bad checksum. 1. Reflash the system ROM with the latest BIOS image. 2. Replace the system board. Interpreting POST diagnostic front panel LEDs 187

Section	Page
Product features	11
Overview	11
Front components	13
Side components	14
Rear components	15
Positioning the computer	16
Adjusting the height-adjustable/recline stand (optional)	16
Adjusting the tilt/swivel stand (optional)	18
Activating and Customizing the Software	19
Activating and customizing the software in Windows 7	19
Activating the Windows operating system	19
Downloading Windows 7 updates	20
Installing or upgrading device drivers	20
Customizing the monitor display	20
Activating and customizing the software in Windows 8	20
Activating the Windows Operating System	20
Downloading Windows 8 updates	21
Customizing the monitor display	21
Illustrated parts catalog	22
System parts	22
Misc parts	24
Keyboards and mice	25
Mass storage devices	25
Boards	26
Cables	27
Sequential part number listing	28
Routine care, SATA drive guidelines, and disassembly preparation	36
Electrostatic discharge information	36
Generating static	37
Preventing electrostatic damage to equipment	37
Personal grounding methods and equipment	38
Grounding the work area	38
Recommended materials and equipment	38
Operating guidelines	39
Routine care	40
General cleaning safety precautions	40
Cleaning the Computer Case	40
Cleaning the keyboard	40
Cleaning the monitor	41
Cleaning the mouse	41
Service considerations	41
Power supply fan	41
Tools and software Requirements	42
Screws	42
Cables and connectors	42
Hard Drives	42
Lithium coin cell battery	43
SATA hard drives	43
SATA hard drive cables	44
SATA data cable	44
SMART ATA drives	44
Cable management	44
Removal and Replacement Procedures All-in One (AIO) Chassis	45
Preparing to disassemble the computer	45
Removing the rear I/O cover	46
Stand	47
Height-adjustable/recline stand (optional)	47
Tilt/swivel stand (optional)	49
Installing an access panel security screw	50
Access panel	51
Drives	53
Replacing a hard disc drive	53
Removing a 2.5-inch hard disc drive	54
Installing a 2.5-inch hard disc drive	56
Replacing the optical disc drive	58
mSATA Solid-State Drive	61
Memory	62
Battery	65
WLAN module	67
Card reader board	69
Optical drive latch	71
Heat sink – Graphics board and processor	73
Graphics heat sink	73
Processor heat sink	74
Processor	76
Graphics board	77
Top rear trim	79
Webcam module	80
Antenna	82
Lower rear panel	84
Fan assembly	86
Speakers	88
Converter board	90
NFC sensor board	92
VESA mounting plate	94
Power supply	96
System board	98
Side panels	102
Power button board	104
Front bezel and display panel	107
Hard drive and optical drive cables and connectors	113
Computer Setup (F10) Utility	115
Computer Setup (F10) Utilities	115
Using Computer Setup (F10) Utilities	116
Computer Setup—File	116
Computer Setup—Storage	118
Computer Setup—Security	121
Computer Setup—Power	126
Computer Setup—Advanced	128
Recovering the Configuration Settings	130
HP PC Hardware Diagnostics	131
Why run HP PC Hardware Diagnostics – UEFI	131
How to access and run HP PC Hardware Diagnostics - UEFI	131
Downloading HP PC Hardware Diagnostics to a USB device	132
Troubleshooting without diagnostics	133
Safety and comfort	133
Before you call for technical support	133
Helpful hints	134
Solving general problems	136
Solving power problems	140
Solving hard drive problems	141
Solving media card reader problems	144
Solving display problems	145
Solving audio problems	151
Solving printer problems	153
Solving keyboard and mouse problems	154
Solving Hardware Installation Problems	157
Solving Network Problems	159
Solving memory problems	163
Solving processor problems	165
Solving CD-ROM and DVD problems	166
Solving USB flash drive problems	168
Solving front panel component problems	169
Solving Internet access problems	169
Solving software problems	171
System backup and recovery	173
Backing up, restoring, and recovering in Windows 8	173
Creating recovery media and backups	174
Restoring and recovering using Windows 8 tools	175
Using Windows 8 Refresh	175
Using Windows 8 Reset	176
Recovery using the Windows 8 recovery USB flash drive	177
Recovery using Windows 8 operating system media (purchased separately)	178
Backing up, restoring, and recovering in Windows 7	179
Creating recovery media	179
Creating recovery media using HP Recovery Manager (select models only)	180
Creating recovery discs with HP Recovery Disc Creator (select models only)	181
Creating recovery discs	181
Backing up your information	182
System Restore	182
System Recovery	183
System Recovery when Windows is responding	183
System Recovery when Windows is not responding	184
System Recovery using recovery media (select models only)	184
Using HP Recovery Disc operating system discs (select models only)	185
POST error messages	187
POST numeric codes and text messages	188
Interpreting POST diagnostic front panel LEDs	196
Password security and resetting CMOS	199
Establishing a setup or power-on password	200
Resetting the setup and power-on password	200
Clearing and resetting the CMOS	201
Power cord set requirements	203
General requirements	203
Japanese power cord requirements	203
Country-specific requirements	204
Specifications	205

Match case Limit results 1 per page

Activity

Beeps

Possible Cause

Recommended Action

Red Power LED flashes four

times, once every second,

followed by a two second

pause. Beeps stop after fifth

iteration but LEDs continue until

problem is solved.

Power failure (power

supply is overloaded).

Open the hood and ensure the 4 or 6-wire

power supply cable is seated into the

connector on the system board.

Check if a device is causing the problem by

removing ALL attached devices. Power on

the system. If the system enters the POST,

then power off and replace one device at a

time and repeat this procedure until failure

occurs. Replace the device that is causing

the failure. Continue adding devices one at

a time to ensure all devices are functioning

properly.

Replace the power supply.

Replace the system board.

Red Power LED flashes five

times, once every second,

followed by a two second

pause. Beeps stop after fifth

iteration but LEDs continue until

problem is solved.

Pre-video memory error.

CAUTION:

To avoid damage to the DIMMs or

the system board, you must unplug the computer

power cord before attempting to reseat, install, or

remove a DIMM module.

Reseat DIMMs.

Replace DIMMs one at a time to isolate the

faulty module.

Replace third-party memory with HP

memory.

Replace the system board.

Red Power LED flashes six

times, once every second,

followed by a two second

pause. Beeps stop after fifth

iteration but LEDs continue until

problem is solved.

Pre-video graphics error.

For systems with a graphics card:

Reseat the graphics card.

Replace the graphics card.

Replace the system board.

For systems with integrated graphics, replace the

system board.

Red Power LED flashes seven

times, once every second,

followed by a two second

pause. Beeps stop after fifth

iteration but LEDs continue until

problem is solved.

System board failure

(ROM detected failure

prior to video).

Replace the system board.

Red Power LED flashes eight

times, once every second,

followed by a two second

pause. Beeps stop after fifth

iteration but LEDs continue until

problem is solved.

Invalid ROM based on

bad checksum.

Reflash the system ROM with the latest BIOS

image.

Replace the system board.

Interpreting POST diagnostic front panel LEDs

187