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Compaq Pro 6305 Maintenance and Service Guide Pro 6305 Microtower Business PC - Page 163

the All-in One or USDT., followed by a two second pause

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Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause, and the computer beeps two times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Processor thermal protection activated: A fan may be blocked or not turning. OR The heat sink is not properly attached to the processor. 1. Ensure that the computer air vents are not blocked and the processor cooling fan is running. 2. Open the access panel, press the power button, and see if the processor fan (or other system fan) spins. If the fan does not spin, make sure the fan cable is plugged onto the system board header. 3. If fan a plugged in and not spinning, replace it. Power LED flashes Red four times, once every second, followed by a two second pause, and the computer beeps four times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Power failure (power supply is overloaded). 1. If equipped with a voltage selector, check that the voltage selector, located on the rear of the power supply (some models), is set to the appropriate voltage. Proper voltage setting depends on your region. 2. Open the access panel and ensure the power supply cable is seated into the connector on the system board. 3. Check if a device is causing the problem by removing ALL attached devices (such as hard drives or optical drives and expansion cards). Power on the system. If the system enters 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. 4. Replace the power supply. 5. Replace the system board. The incorrect external power supply adapter is being used on the All-in One or USDT. The power supply adapter must be at the correct power rating and use the Smart ID technology before the system will power up. Replace the power supply adapter with the HP-supplied power supply adapter. Solving Power Problems 153

Section	Page
Product Features	11
Standard Configuration Features	11
Microtower (MT) Front Panel Components	12
Small Form Factor (SFF) Front Panel Components	13
Microtower (MT) Rear Panel Components	14
Small Form Factor (SFF) Rear Panel Components	15
Serial Number Location	16
Activating and Customizing the Software	17
Activating and customizing the software in Windows 7	17
Activating the Windows operating system	17
Downloading Windows 7 updates	18
Installing or upgrading device drivers	18
Customizing the monitor display	18
Activating and customizing the software in Windows 8	18
Activating the Windows Operating System	18
Downloading Windows 8 updates	19
Customizing the monitor display	19
Computer Setup (F10) Utility	20
Computer Setup (F10) Utilities	20
Using Computer Setup (F10) Utilities	21
Computer Setup—File	22
Computer Setup—Storage	23
Computer Setup—Security	26
Computer Setup—Power	31
Computer Setup—Advanced	32
Recovering the Configuration Settings	34
Illustrated parts catalog	35
Microtower (MT) chassis spare parts	35
Computer major components	35
Cables	37
Misc parts	38
Drives	40
Misc boards	40
Sequential part number listing	41
Small Form Factor (SFF) chassis spare parts	45
Computer major components	45
Cables	47
Misc parts	48
Drives	50
Misc boards	50
Sequential part number listing	51
Routine Care, SATA Drive Guidelines, and Disassembly Preparation	55
Electrostatic Discharge Information	55
Generating Static	55
Preventing Electrostatic Damage to Equipment	56
Personal Grounding Methods and Equipment	56
Grounding the Work Area	57
Recommended Materials and Equipment	57
Operating Guidelines	58
Routine Care	58
General Cleaning Safety Precautions	58
Cleaning the Computer Case	59
Cleaning the Keyboard	59
Cleaning the Monitor	59
Cleaning the Mouse	60
Service Considerations	60
Power Supply Fan	60
Tools and Software Requirements	60
Screws	60
Cables and Connectors	61
Hard Drives	61
Lithium Coin Cell Battery	61
SATA Hard Drives	62
SATA Hard Drive Cables	62
SATA Data Cable	62
SMART ATA Drives	62
Cable Management	62
Hard Drive Capacities	63
Removal and Replacement Procedures Microtower (MT) Chassis	64
Preparation for Disassembly	64
Computer Access Panel	65
Front Bezel	66
Front Bezel Security	67
Bezel Blanks	69
Memory	70
DIMMs	70
DDR3-SDRAM DIMMs	70
Populating DIMM Sockets	71
Installing DIMMs	72
Expansion Cards	74
WLAN module	77
System Board Connections	79
Drives	80
Drive Positions	82
Removing a 5.25-inch or 3.5-inch Drive from a Drive Bay	83
Installing a 5.25-inch or 3.5-inch Drive into a Drive Bay	85
Removing a Hard Drive from a Drive Bay	87
Installing a Hard Drive into an Internal Drive Bay	88
Removing and Replacing a Removable 3.5-inch SATA Hard Drive	90
Front Fan Assembly	95
Front I/O Assembly	96
Power Switch/LED Assembly	97
Heat sink	99
Processor	100
Speaker	101
Rear Chassis Fan	103
Power Supply	105
System Board	106
Removal and Replacement Procedures Small Form Factor (SFF) Chassis	109
Preparation for Disassembly	109
Access Panel	110
Front Bezel	111
Front Bezel Security	112
Bezel Blanks	114
Memory	115
DIMMs	115
DDR3-SDRAM DIMMs	115
Populating DIMM Sockets	116
Installing DIMMs	117
Expansion Card	119
WLAN module	123
System Board Connections	125
Drives	126
Drive Positions	127
Installing and Removing Drives	127
Removing a 5.25-inch Drive from a Drive Bay	129
Installing a 5.25-inch Drive into a Drive Bay	129
Removing a 3.5-inch Drive from a Drive Bay	131
Installing a 3.5-inch Drive into a Drive Bay	133
Removing and Replacing the Primary 3.5-inch Internal Hard Drive	135
Removing and Replacing a Removable 3.5-inch SATA Hard Drive	137
Fan duct	142
Front Fan Assembly	143
Hood Sensor	145
Front I/O, Power Switch Assembly	146
Speaker	148
Heat sink	149
Processor	151
Power Supply	152
System Board	153
Using the Small Form Factor Computer in a Tower Orientation	155
Troubleshooting Without Diagnostics	156
Safety and Comfort	156
Before You Call for Technical Support	156
Helpful Hints	157
Solving General Problems	158
Solving Power Problems	162
Solving Hard Drive Problems	164
Solving Media Card Reader Problems	166
Solving Display Problems	168
Solving Audio Problems	173
Solving Printer Problems	175
Solving Keyboard and Mouse Problems	176
Solving Hardware Installation Problems	179
Solving Network Problems	181
Solving Memory Problems	185
Solving Processor Problems	186
Solving CD-ROM and DVD Problems	187
Solving USB Flash Drive Problems	189
Solving Front Panel Component Problems	190
Solving Internet Access Problems	191
Solving Software Problems	192
Contacting Customer Support	194
HP PC Hardware Diagnostics	195
Why run HP PC Hardware Diagnostics – UEFI	195
How to access and run HP PC Hardware Diagnostics - UEFI	195
Downloading HP PC Hardware Diagnostics to a USB device	196
POST Error Messages	197
POST Numeric Codes and Text Messages	197
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes	205
Password Security and Resetting CMOS	209
Resetting the Password Jumper	209
Clearing and Resetting the CMOS	210
Backup and Recovery	213
Restoring and recovering in Windows 7	213
System Restore	213
System Recovery	213
System Recovery when Windows is responding	214
System Recovery when Windows is not responding	215
System recovery using recovery media	215
Creating recovery media	216
Using recovery media	217
Backup and recovery in Windows 8	217
Backing up your information	218
Performing a system recovery	218
Using the Windows recovery tools	219
Using f11 recovery tools	219
Using Windows 8 operating system media (purchased separately)	220
Battery Replacement	221
Power Cord Set Requirements	224
General Requirements	224
Japanese Power Cord Requirements	224
Country-Specific Requirements	225
Specifications	226
MT Specifications	226
SFF Specifications	227

Match case Limit results 1 per page

Computer powered off automatically and the Power LED flashes Red two times, once every second,

followed by a two second pause, and the computer beeps two times. (Beeps stop after fifth iteration but

LEDs continue flashing.)

Cause

Solution

Processor thermal protection activated:

A fan may be blocked or not turning.

The heat sink is not properly attached to the processor.

Ensure that the computer air vents are not blocked and

the processor cooling fan is running.

Open the access panel, press the power button, and see

if the processor fan (or other system fan) spins. If the fan

does not spin, make sure the fan cable is plugged onto

the system board header.

If fan a plugged in and not spinning, replace it.

Power LED flashes Red four times, once every second, followed by a two second pause, and the

computer beeps four times. (Beeps stop after fifth iteration but LEDs continue flashing.)

Cause

Solution

Power failure (power supply is overloaded).

If equipped with a voltage selector, check that the

voltage selector, located on the rear of the power supply

(some models), is set to the appropriate voltage. Proper

voltage setting depends on your region.

Open the access panel and ensure the 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 (such as hard drives or optical

drives and expansion cards). Power on the system. If the

system enters 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.

The incorrect external power supply adapter is being used on

the All-in One or USDT.

The power supply adapter must be at the correct power rating

and use the Smart ID technology before the system will power

up. Replace the power supply adapter with the HP-supplied

power supply adapter.

Solving Power Problems

153