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HP 285 Maintenance and Service Guide - Page 77

Solving display problems, causes and solutions listed in the following table.

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After installing the media card reader and booting to Windows, the reader and the inserted cards are not recognized by the computer. Cause Solution The operating system needs time to recognize the device if the reader was just installed into the computer and you are turning the PC on for the first time. Wait a few seconds so that the operating system can recognize the reader and the available ports, and then recognize the media inserted in the reader. After inserting a media card in the reader, the computer attempts to boot from the media card. Cause Solution The inserted media card has boot capability. 1. If you do not want to boot from the media card, remove it during boot or do not select the option to boot from the inserted media card during the boot process. 2. During POST (Power On Self-Test), press F9 to modify the boot menu. 3. Change the boot sequence in F10 Computer Setup. Solving display problems If you encounter display problems, see the documentation that came with the monitor and to the common causes and solutions listed in the following table. Blank screen (no video). Cause Monitor is not turned on and the monitor light is not on. Bad monitor. The cable connections are not correct. You may have a screen blanking utility installed or energy saver features are enabled. System ROM is corrupted; system is running in Boot Block Emergency Recovery Mode (indicated by eight beeps). You are using a fixed-sync monitor and it will not sync at the resolution chosen. Computer is in Sleep state. Monitor cable is plugged into the wrong connector. Monitor settings in the computer are not compatible with the monitor. Solution Turn on the monitor and check that the monitor light is on. Try a different monitor. Check the cable connection from the monitor to the computer and to the electrical outlet. Press any key or click the mouse button and type your password (if set). Reflash the system ROM with the latest BIOS image. Be sure that the monitor can accept the same horizontal scan rate as the resolution chosen. Press the power button to resume from Sleep state. CAUTION: When attempting to resume from Sleep state, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data. Systems may have a monitor connection on both the motherboard or an add-in card. Try moving the monitor connection to a different connector on the back of the computer 1. In Control Panel, select Category from the View by list, then under Appearance and Personalization, select Adjust screen resolution. Solving display problems 69

Section	Page
Product features	9
Standard configuration features	9
Front panel components	10
Rear panel components	11
Serial number location	11
Illustrated parts catalog	12
Microtower (MT) chassis spare parts	12
Computer major components	12
Misc parts	14
Misc boards	16
Drives	16
Routine care, SATA drive guidelines, and disassembly preparation	17
Electrostatic discharge information	17
Generating static	17
Preventing electrostatic damage to equipment	18
Personal grounding methods and equipment	18
Grounding the work area	18
Recommended materials and equipment	19
Operating guidelines	19
Routine care	20
General cleaning safety precautions	20
Cleaning the Computer Case	20
Cleaning the keyboard	20
Cleaning the monitor	21
Cleaning the mouse	21
Service considerations	21
Power supply fan	21
Tools and software Requirements	21
Screws	22
Cables and connectors	22
Hard Drives	22
Lithium coin cell battery	22
SATA hard drives	23
SATA hard drive cables	23
SATA data cable	23
SMART ATA drives	23
Cable management	24
Removal and replacement procedures – Microtower (MT) chassis	25
Preparation for disassembly	25
Access panel	26
Front bezel	27
Front bezel security	28
Slim optical drive bezel blank	29
Memory	30
DIMMs	30
DIMM specifications	30
Populating DIMM sockets	30
Installing DIMMs	31
Expansion cards	33
Drives	36
Drive positions	37
Removing a 9.5 mm slim optical drive	38
Installing a 9.5 mm slim optical drive	39
Removing a hard drive	41
Installing a hard drive	42
Front I/O and power switch assembly	45
Speaker	47
Rear chassis fan	48
Power supply	49
Fan sink	52
Processor for use in HP 280 G2 models (Intel)	53
Processor for use in HP 285 G2 models (AMD)	54
System board	55
System board callouts – HP 280 Pro G2 Microtower models	56
System board callouts – HP 280 G2 Microtower models	57
System board callouts – HP 285 G2 Microtower models	58
Computer Setup (F10) Utility	59
Computer Setup (F10) Utilities	59
Using Computer Setup (F10) Utilities	60
Computer Setup—File	61
Computer Setup—Storage	62
Computer Setup—Security	63
Computer Setup—Power	65
Computer Setup—Advanced	65
Recovering the Configuration Settings	66
Troubleshooting without diagnostics	67
Safety and comfort	67
Before you call for technical support	67
Helpful hints	68
Solving general problems	69
Solving power problems	73
Solving hard drive problems	74
Solving media card reader problems	76
Solving display problems	77
Solving audio problems	81
Solving printer problems	83
Solving keyboard and mouse problems	84
Solving hardware installation problems	86
Solving network problems	87
Solving memory problems	90
Solving CD-ROM and DVD problems	91
Solving USB flash drive problems	93
Solving front panel component problems	94
Solving Internet access problems	95
Solving software problems	96
POST error messages and diagnostic front panel LEDs and audible codes	97
POST numeric codes and text messages	97
Interpreting system validation diagnostic front panel LEDs and audible codes	102
Password security and resetting CMOS	104
Resetting the password jumper	104
Changing a Setup or Power-On password	105
Deleting a Setup or Power-On password	106
Using HP PC Hardware Diagnostics (UEFI)	107
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device	107
System backup and recovery	109
Backing up, restoring, and recovering in Windows 10	109
Creating recovery media and backups	109
Creating HP Recovery media (select products only)	109
Using Windows tools	110
Restore and recovery	110
Recovering using HP Recovery Manager	111
What you need to know before you get started	111
Using the HP Recovery partition (select products only)	112
Using HP Recovery media to recover	112
Changing the computer boot order	112
Removing the HP Recovery partition (select products only)	112
Backing up, restoring, and recovering in Windows 7	113
Creating recovery media	113
Creating recovery media using HP Recovery Manager (select models only)	114
Creating recovery discs with HP Recovery Disc Creator (select models only)	115
Creating recovery discs	115
Backing up your information	115
System Restore	116
System Recovery	116
System Recovery when Windows is responding	117
System Recovery when Windows is not responding	117
System Recovery using recovery media (select models only)	118
Using HP Recovery Disc operating system discs (select models only)	118
Battery replacement	120
Power Cord Set Requirements	123
General Requirements	123
Japanese Power Cord Requirements	123
Country-Specific Requirements	124
Statement of Volatility	125
Specifications	127
MT Specifications	127

Match case Limit results 1 per page

After installing the media card reader and booting to Windows, the reader and the inserted cards are not recognized by the

computer.

Cause

Solution

The operating system needs time to recognize the device if the

reader was just installed into the computer and you are turning

the PC on for the

ﬁrst

time.

Wait a few seconds so that the operating system can recognize

the reader and the available ports, and then recognize the media

inserted in the reader.

After inserting a media card in the reader, the computer attempts to boot from the media card.

Cause

Solution

The inserted media card has boot capability.

If you do not want to boot from the media card, remove it

during boot or do not select the option to boot from the

inserted media card during the boot process.

During POST (Power On Self-Test), press

to modify the

boot menu.

Change the boot sequence in F10 Computer Setup.

Solving display problems

If you encounter display problems, see the documentation that came with the monitor and to the common

causes and solutions listed in the following table.

Blank screen (no video).

Cause

Solution

Monitor is not turned on and the monitor light is not on.

Turn on the monitor and check that the monitor light is on.

Bad monitor.

Try a

diﬀerent

monitor.

The cable connections are not correct.

Check the cable connection from the monitor to the computer and

to the electrical outlet.

You may have a screen blanking utility installed or energy saver

features are enabled.

Press any key or click the mouse button and type your password

(if set).

System ROM is corrupted; system is running in Boot Block

Emergency Recovery Mode (indicated by eight beeps).

Reﬂash

the system ROM with the latest BIOS image.

You are using a

ﬁxed-sync

monitor and it will not sync at the

resolution chosen.

Be sure that the monitor can accept the same horizontal scan rate

as the resolution chosen.

Computer is in Sleep state.

Press the power button to resume from Sleep state.

CAUTION:

When attempting to resume from Sleep state, do not

hold down the power button for more than four seconds.

Otherwise, the computer will shut down and you will lose any

unsaved data.

Monitor cable is plugged into the wrong connector.

Systems may have a monitor connection on both the

motherboard or an add-in card. Try moving the monitor

connection to a

diﬀerent

connector on the back of the computer

Monitor settings in the computer are not compatible with the

monitor.

In Control Panel, select