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HP 5850 Service Reference Guide: HP Compaq dc5850 Business PC - Page 167

Heatsink, area with thermal grease.

UPC - 844844844303

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Heatsink WARNING! To reduce risk of personal injury from hot surfaces, allow the internal system components to cool before touching. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Disconnect the heatsink fan control cable from the system board (P8, CPUFAN). 4. Loosen the four captive silver T15 screws that secure the heatsink to the system board tray. CAUTION: Heatsink retaining screws should be removed in diagonally opposite pairs (as in an X) to even the downward forces on the processor. This is especially important as the pins on the socket are very fragile and any damage to them may require replacing the system board. 5. Lift the heatsink from atop the processor and set it on its side to keep from contaminating the work area with thermal grease. When reinstalling the heatsink, make sure that its bottom has been cleaned with an alcohol wipe and fresh thermal grease has been applied to the top of the processor. CAUTION: Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an X) to evenly seat the heatsink on the processor. This is especially important as the pins on the socket are very fragile and any damage to them may require replacing the system board. Failure to install the fan shroud may cause the computer to overheat. Heatsink 155

Section	Page
Installing and Customizing the Software	13
Installing the Operating System	13
Installing or Upgrading Device Drivers	13
HP Backup and Recovery Manager	14
Computer Setup (F10) Utility	15
Computer Setup (F10) Utilities	15
Using Computer Setup (F10) Utilities	16
Computer Setup—File	17
Computer Setup—Storage	18
Computer Setup—Security	21
Computer Setup—Power	24
Computer Setup—Advanced	25
Recovering the Configuration Settings	27
HP Insight Diagnostics	28
HP Insight Diagnostics	28
Accessing HP Insight Diagnostics	28
Survey Tab	29
Test Tab	30
Status Tab	30
Log Tab	31
Help Tab	31
Saving and Printing Information in HP Insight Diagnostics	32
Downloading the Latest Version of HP Insight Diagnostics	32
Protecting the Software	32
HP Backup and Recovery Manager	33
Desktop Management	34
Initial Configuration and Deployment	34
HP Software Agent	35
Altiris Deployment Solution Agent	35
Remote System Installation	36
Software Updating and Management	36
HP Client Management Interface	36
HP SoftPaq Download Manager	37
HP System Software Manager	37
HP ProtectTools Security Manager	38
HP Client Configuration Manager	38
HP Configuration Management Solution	39
HP Client Manager for Altiris	39
Altiris Client Management Suite	40
HP Client Catalog for SMS	40
HP Backup and Recovery Manager	40
Intel vPro-branded PCs with Active Management Technology	41
Verdiem Surveyor	43
HP Proactive Change Notification	43
Subscriber’s Choice	43
Retired Solutions	43
ROM Flash	44
Remote ROM Flash	44
HPQFlash	44
Boot Block Emergency Recovery Mode	45
Replicating the Setup	46
Copying to Single Computer	46
Copying to Multiple Computers	46
Creating a Bootable Device	47
Supported USB Flash Media Device	47
Unsupported USB Flash Media Device	49
Dual-State Power Button	50
HP Web Site Support	50
Industry Standards	51
Asset Tracking and Security	51
Password Security	53
Establishing a Setup Password Using Computer Setup	53
Establishing a Power-On Password Using Computer Setup	54
Entering a Power-On Password	54
Entering a Setup Password	54
Changing a Power-On or Setup Password	55
Deleting a Power-On or Setup Password	55
National Keyboard Delimiter Characters	56
Clearing Passwords	56
DriveLock	56
Using DriveLock	56
DriveLock Applications	57
Smart Cover Sensor	57
Setting the Smart Cover Sensor Protection Level	58
Smart Cover Lock	58
Locking the Smart Cover Lock	58
Unlocking the Smart Cover Lock	59
Using the Smart Cover FailSafe Key	59
Cable Lock Provision	59
Fingerprint Identification Technology	59
Fault Notification and Recovery	60
Drive Protection System	60
Surge-Tolerant Power Supply	60
Thermal Sensor	60
Serial and Parallel ATA Drive Guidelines and Features	61
SATA Hard Drives	61
SATA Hard Drive Cables	62
SATA Data Cable	62
SATA Power Cable	62
PATA Device Information	63
ATA SMART Drives	63
Hard Drive Capacities	63
Identifying the Chassis, Routine Care, and Disassembly Preparation	64
Chassis Designations	64
Small Form Factor (SFF)	64
Microtower (MT)	65
Electrostatic Discharge Information	65
Generating Static	65
Preventing Electrostatic Damage to Equipment	66
Personal Grounding Methods and Equipment	66
Grounding the Work Area	66
Recommended Materials and Equipment	67
Operating Guidelines	67
Routine Care	68
General Cleaning Safety Precautions	68
Cleaning the Computer Case	68
Cleaning the Keyboard	68
Cleaning the Monitor	69
Cleaning the Mouse	69
Service Considerations	69
Power Supply Fan	69
Tools and Software Requirements	70
Screws	70
Cables and Connectors	70
Hard Drives	70
Lithium Coin Cell Battery	71
Removal and Replacement Procedures Microtower (MT) Chassis	72
Serial Number Location	72
Preparation for Disassembly	73
External Security Devices	74
Cable Lock	74
Padlock	74
HP Business PC Security Lock	75
Front Bezel Security	77
Computer Access Panel	78
Front Bezel	79
Cable Management	80
Memory	81
Expansion Cards	84
Drives	88
System Board Drive Connections	90
Drive Positions	91
Removing an External 5.25-inch or 3.5-inch Drive	92
Installing an External 5.25-inch or 3.5-inch Drive	94
Removing an Internal 3.5-inch Hard Drive	97
Installing an Internal 3.5-inch Hard Drive	98
Removing and Replacing a Removable 3.5-inch SATA Hard Drive	100
ReadyBoost Card	104
Processor Baffle	105
Fan/Air Baffle	106
Front USB Panel	107
Power Switch/LED Assembly	108
Heatsink	109
Processor	110
Speaker	111
Rear Chassis Fan	112
Optional Serial Port	113
Power Supply	114
System Board	116
Battery	117
Type 1 Battery Holder	118
Type 2 Battery Holder	118
Type 3 Battery Holder	119
Removal and Replacement Procedures Small Form Factor (SFF) Chassis	120
Preparation for Disassembly	120
External Security Devices	121
Installing a Security Lock	121
Cable Lock	121
Padlock	122
HP Business PC Security Lock	123
Front Bezel Security	125
Computer Access Panel	126
Front Bezel	127
Bezel Blanks	128
Using the Small Form Factor Computer in a Tower Orientation	129
Installing Additional Memory	131
DIMMs	131
DDR2-SDRAM DIMMs	131
Populating DIMM Sockets	132
Installing DIMMs	133
Expansion Cards	135
Cable Management	139
Cable Connections	140
Drives	141
Drive Positions	141
Installing and Removing Drives	142
System Board Drive Connections	144
Removing an Optical Drive	145
Installing an Optical Drive into the 5.25-inch Drive Bay	146
Removing an External 3.5-inch Drive	149
Installing a Drive into the 3.5-inch External Drive Bay	151
Removing and Replacing the Primary 3.5-inch Internal SATA Hard Drive	153
Removing and Replacing a Removable 3.5-inch SATA Hard Drive	157
Cable Routing	161
ReadyBoost Card	162
Inner Baffle	163
Fan/Outer Baffle	164
Power Switch Assembly	165
Front I/O Device	166
Heatsink	167
Processor	168
Speaker	169
Power Supply	170
System Board	171
Battery	172
Type 1 Battery Holder	173
Type 2 Battery Holder	173
Type 3 Battery Holder	174
Connector Pin Assignments	175
Keyboard	175
Mouse	175
Ethernet RJ-45	175
Serial Interface, Powered and Non-Powered	176
USB	176
Microphone	176
Headphone	177
Line-in Audio	177
Line-out Audio	177
External Infrared Transceiver	177
Monitor	178
ATA/ATAPI (IDE) Standard Drive Cable	179
24-Pin Power (CMT and MT models)	179
24-Pin MicroFit Power (USDT, SFF, and ST models)	180
4-Pin Power (for CPU) (MT and CMT models)	180
6-Pin Power (for CPU) (USDT, SFF, and ST models)	180
SATA Data and Power	181
PCI Express	181
PCI Express	182
DVI Connector	183
Power Cord Set Requirements	184
General Requirements	184
Japanese Power Cord Requirements	184
Country-Specific Requirements	185
POST Error Messages	186
POST Numeric Codes and Text Messages	187
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes	191
Troubleshooting Without Diagnostics	194
Safety and Comfort	194
Before You Call for Technical Support	194
Helpful Hints	195
Solving General Problems	197
Solving Power Problems	201
Solving Diskette Problems	202
Solving Hard Drive Problems	205
Solving Media Card Reader Problems	208
Solving Display Problems	210
Solving Audio Problems	214
Solving Printer Problems	216
Solving Keyboard and Mouse Problems	217
Solving Hardware Installation Problems	219
Solving Network Problems	221
Solving Memory Problems	224
Solving Processor Problems	226
Solving CD-ROM and DVD Problems	227
Solving Drive Key Problems	229
Solving Front Panel Component Problems	230
Solving Internet Access Problems	231
Solving Software Problems	233
Contacting Customer Support	234
System Board and Riser Board Reference Designators	235
Specifications	241
Microtower Chassis	241
Small Form Factor Chassis	243

Match case Limit results 1 per page

Heatsink

WARNING!

To reduce risk of personal injury from hot surfaces, allow the internal system components

to cool before touching.

Prepare the computer for disassembly (

Preparation for Disassembly

on page

108

Remove the access panel (

Computer Access Panel

on page

114

Disconnect the heatsink fan control cable from the system board (P8, CPUFAN).

Loosen the four captive silver T15 screws that secure the heatsink to the system board tray.

CAUTION:

Heatsink retaining screws should be removed in diagonally opposite pairs (as in an

X) to even the downward forces on the processor. This is especially important as the pins on the

socket are very fragile and any damage to them may require replacing the system board.

Lift the heatsink from atop the processor and set it on its side to keep from contaminating the work

area with thermal grease.

When reinstalling the heatsink, make sure that its bottom has been cleaned with an alcohol wipe and

fresh thermal grease has been applied to the top of the processor.

CAUTION:

Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an X) to

evenly seat the heatsink on the processor. This is especially important as the pins on the socket are

very fragile and any damage to them may require replacing the system board.

Failure to install the fan shroud may cause the computer to overheat.

Heatsink

155