HP Pro Mini 400 G9 Desktop PC Maintenance and Service Guide - Page 5

Computer will not boot from hard drive

..................................................................................................................

50

Computer seems to be locked up

............................................................................................................................

51

Solving audio problems

...................................................................................................................................................

51

Sound cuts in and out

..............................................................................................................................................

51

Sound does not come out of the speaker or headphones

......................................................................................

51

Computer appears to be locked up while recording audio

......................................................................................

52

Line-in jack is not functioning properly

..................................................................................................................

52

Solving printer problems

.................................................................................................................................................

52

Printer will not print

................................................................................................................................................

52

Printer will not turn on

............................................................................................................................................

53

Printer prints garbled information

..........................................................................................................................

53

Printer will not print

................................................................................................................................................

53

Solving keyboard and mouse problems

..........................................................................................................................

53

Keyboard commands and typing are not recognized by the computer

..................................................................

53

Mouse does not respond to movement or is too slow

............................................................................................

54

Solving hardware installation problems

.........................................................................................................................

54

A new device is not recognized as part of the system

............................................................................................

54

Computer will not start

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55

Power light blinks red three times and then white two times

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55

Solving network problems

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56

Network driver does not detect network controller

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56

Network status link light never blinks

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56

Diagnostics reports a failure

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56

Diagnostics passes, but the computer does not communicate with the network

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57

Network controller stopped working when an expansion board was added to the computer

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57

Network controller stops working without apparent cause

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57

Cannot connect to network server when attempting remote system installation

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57

System setup utility reports unprogrammed EEPROM

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58

Solving memory problems

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58

System will not boot or does not function properly after installing additional memory modules

.......................

58

Out of memory error

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58

Memory count during POST is wrong

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58

Insufficient memory error during operation

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59

Power light blinks red five times followed by a two-second pause and the computer beeps five times

(beeps stop after fifth iteration but lights continue blinking)

................................................................................

59

Solving USB flash drive problems

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59

USB flash drive is not seen as a drive letter in Windows

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59

USB flash drive not found (identified)

.....................................................................................................................

59

System will not boot from USB flash drive

..............................................................................................................

60

The computer boots to DOS after making a bootable flash drive

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60

Solving internet access problems

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60

Unable to connect to the internet

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60

Cannot automatically launch internet programs

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61

Solving software problems

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61

Computer will not start up and the HP logo does not appear

................................................................................

61

“Illegal Operation has Occurred” error message is displayed

................................................................................

61

v

Section	Page
Computer features	8
Standard configuration features	8
Front panel components	8
Rear panel components	9
Serial number location	10
Using an optional security lock	10
Security cable lock	10
Padlock	11
Illustrated parts catalog	12
Computer major components	12
Mass storage devices	14
Miscellaneous parts	15
Routine care, drive guidelines, and disassembly preparation	18
Electrostatic discharge information	18
Generating static electricity	18
Preventing electrostatic damage to equipment	19
Personal grounding methods and equipment	19
Grounding the work area	20
Recommended materials and equipment	20
Operating guidelines	21
Routine care	21
General cleaning safety precautions	21
Removing dirt and debris from your computer	22
Cleaning your computer with a disinfectant	22
Cleaning the computer case	23
Cleaning the keyboard	23
Cleaning the monitor	24
Cleaning the mouse	24
Service considerations	24
Tools and software requirements	24
Screws	24
Cables and connectors	25
Hard drives	25
Lithium coin cell battery	25
SATA hard drives	26
Cable management	26
Removal and replacement procedures	27
Preparation for disassembly	27
Access panel	27
Front bezel	28
Memory modules (SODIMMs)	29
Ambient (thermal) sensor	32
Fan	33
Hard drive and drive cage	34
Solid-state drive	35
WLAN module	37
Battery	39
Flex I/O connector board #1	40
Flex I/O connector board #2	41
Speaker	42
Processor heat sink	43
Processor	44
System board	45
System board callouts	47
Wireless antennas and cables	48
Troubleshooting without diagnostics	50
Before you call for technical support	50
Helpful hints	51
Solving general problems	51
Cannot access the Computer Setup (F10) Utility when booting the computer	52
Computer appears locked up and will not turn off when the power button is pressed	52
Computer will not respond to keyboard or mouse	52
Computer date and time display is incorrect	52
There is no sound or sound volume is too low	52
Cannot remove computer cover or access panel	53
Poor performance	53
Computer turned off automatically and the power light blinks red four times and then white two times	54
System does not turn on and the lights on the front of the computer are not blinking	54
Solving power problems	55
Power supply shuts down intermittently	55
Computer turned off automatically, power light blinks red two times followed by a two-second pause, and the computer beeps two times (beeps stop after fifth iteration but lights continue blinking)	55
Power light blinks red four times followed by a two-second pause and the computer beeps four times (beeps stop after fifth iteration but lights continue blinking)	56
Solving hard drive problems	56
Hard drive error occurs	56
Disk drive transaction problem	56
Drive not found (identified)	57
Nonsystem disk/NTLDR missing message	57
Computer will not boot from hard drive	57
Computer seems to be locked up	58
Solving audio problems	58
Sound cuts in and out	58
Sound does not come out of the speaker or headphones	58
Computer appears to be locked up while recording audio	59
Line-in jack is not functioning properly	59
Solving printer problems	59
Printer will not print	59
Printer will not turn on	60
Printer prints garbled information	60
Printer will not print	60
Solving keyboard and mouse problems	60
Keyboard commands and typing are not recognized by the computer	60
Mouse does not respond to movement or is too slow	61
Solving hardware installation problems	61
A new device is not recognized as part of the system	61
Computer will not start	62
Power light blinks red three times and then white two times	62
Solving network problems	63
Network driver does not detect network controller	63
Network status link light never blinks	63
Diagnostics reports a failure	63
Diagnostics passes, but the computer does not communicate with the network	64
Network controller stopped working when an expansion board was added to the computer	64
Network controller stops working without apparent cause	64
Cannot connect to network server when attempting remote system installation	64
System setup utility reports unprogrammed EEPROM	65
Solving memory problems	65
System will not boot or does not function properly after installing additional memory modules	65
Out of memory error	65
Memory count during POST is wrong	65
Insufficient memory error during operation.	66
Power light blinks red five times followed by a two-second pause and the computer beeps five times (beeps stop after fifth iteration but lights continue blinking)	66
Solving USB flash drive problems	66
USB flash drive is not seen as a drive letter in Windows	66
USB flash drive not found (identified)	66
System will not boot from USB flash drive	67
The computer boots to DOS after making a bootable flash drive	67
Solving internet access problems	67
Unable to connect to the internet	67
Cannot automatically launch internet programs	68
Solving software problems	68
Computer will not start up and the HP logo does not appear	68
“Illegal Operation has Occurred” error message is displayed	68
Computer Setup (F10) Utility	69
Using Computer Setup (F10) Utilities	69
Computer Setup Main	70
Computer Setup Security	73
Computer Setup Advanced	78
POST error messages	86
POST numeric codes and text messages	86
Interpreting POST diagnostic front panel lights and audible codes	92
Password security and resetting CMOS	94
Changing a setup or power-on password	94
Deleting a setup or power-on password	94
Backing up, restoring, and recovering	96
Backing up information and creating recovery media	96
Using Windows tools for backing up	96
Using the HP Cloud Recovery Download Tool to create recovery media (select products only)	96
Restoring and recovering your system	96
Creating a system restore	97
Restoring and recovery methods	97
Recovering using HP Recovery media	97
Changing the computer boot order	98
Using HP Sure Recover (select products only)	98
Using HP PC Hardware Diagnostics	99
Using HP PC Hardware Diagnostics Windows (select products only)	99
Using an HP PC Hardware Diagnostics Windows hardware failure ID code	99
Accessing HP PC Hardware Diagnostics Windows	99
Accessing HP PC Hardware Diagnostics Windows from HP Help and Support (select products only)	99
Accessing HP PC Hardware Diagnostics Windows from HP Support Assistant	100
Accessing HP PC Hardware Diagnostics Windows from the Start menu (select products only)	100
Downloading HP PC Hardware Diagnostics Windows	100
Downloading the latest HP PC Hardware Diagnostics Windows version from HP	100
Downloading the HP PC Hardware Diagnostics Windows from the Microsoft Store	100
Downloading HP Hardware Diagnostics Windows by product name or number (select products only)	101
Installing HP PC Hardware Diagnostics Windows	101
Using HP PC Hardware Diagnostics UEFI	101
Using an HP PC Hardware Diagnostics UEFI hardware failure ID code	101
Starting HP PC Hardware Diagnostics UEFI	102
Downloading HP PC Hardware Diagnostics UEFI to a USB flash drive	102
Downloading the latest HP PC Hardware Diagnostics UEFI version	102
Downloading HP PC Hardware Diagnostics UEFI by product name or number (select products only)	103
Using Remote HP PC Hardware Diagnostics UEFI settings (select products only)	103
Downloading Remote HP PC Hardware Diagnostics UEFI	103
Downloading the latest Remote HP PC Hardware Diagnostics UEFI version	103
Downloading Remote HP PC Hardware Diagnostics UEFI by product name or number	103
Customizing Remote HP PC Hardware Diagnostics UEFI settings	103
Statement of memory volatility	105
Current BIOS steps	105
Nonvolatile memory usage	107
Questions and answers	109
Using HP Sure Start (select products only)	111
Power cord set requirements	112
General requirements	112
Japanese power cord requirements	112
Country-specific requirements	112
Specifications	114

HP Pro Mini 400 G9 Desktop PC Maintenance and Service Guide - Page 5

Memory count during POST is wrong, Insuﬀicient memory error during operation

Page 5 highlights