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Compaq 1655 down, computer, Next Step, 2. Close the, bottom of the, 3. Remove three, screws from the, computer and turn, the computer upside

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	Palmrest

	CD Drive	2. Close the


	Display Panel	computer and turn
	Assembly	the computer upside
		down.

	Upper CPU
	Upper CPU
	Cover	3. Remove three
		3. Remove three
		screws from the
	Speaker	screws from the
	Speaker	bottom of the
	Assembly	bottom of the
	Assembly	computer.
		computer.

	Diskette Drive
		Next Step

	Fan Assembly
	Fan Assembly


	Audio Board


	System Board


	Memory
	Module

1.800.AT.COMPAQ

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Contents

Page Page Page Notice Page Symbols Technician Notes Serial Number Locating Additional Information Product Description Page Troubleshooting Page Illustrated Parts Catalog Page Removal and Replacement Procedures Page Physical and Environmental System Interrupts Intel PCI to USB Universal Host Controller Intel PCI Bus Master IDE Controller Secondary IDE System DMA System I/O Address DMA Gameport Joystick 0220h-022Fh ES1869 Plug and Play AudioDrive 02F8h-02FFh 0378h-037Fh 0388h-038Bh 03B0h-03BBh 03C0h-03DFh 03F8h-03FFh System Memory Catalog 000DC000h-000FFFFFh System board extension for PnP BIOS 00100000h-03FFFFFFh 05000000h-05000FFFh Memory Expansion Diskette Drive (Information not available) Hard Drive (Information not available) CD Drive (Information not available) Battery Pack Battery Pack Nickel Metal Hydride (NiMH) Lithium Ion (Li ion) 0.8 in (20.3 mm) Length Connector Pin Assignments Rear Connectors Parallel Connector Pin Signal Connector Keyboard/Mouse External VGA Monitor Universal Serial Bus Port Replicator N.C Printer Data CTS DCD Kb Clk 1 Unused 2 Unused 3 Tip 4 Ring 5 Unused Increasing Battery Pack Operating Time Minimizing the Energy Required Maximizing the Energy Stored Conditioning a Battery Pack Disposal of a Used Battery Pack Models and Features Page Controls and Lights Models and Features Controls and Lights Page Left Side Components Page 6. Manual Eject Hole 7. PCMCIA (Top Slot) 8.PCMCIA Bottom of Unit Models and 1. Memory Features Compartment Maintenance & Service Guide Presario 1600 Series Models: 1650 and Home Page Notice Port Replicator Models and Features Controls and Lights Left Side Components Right Side Components Revised: dd Month Power Management Settings Power Management Properties Display Properties System Properties Sleep Hibernation Mode Servicing Your Computer - Full Off Mode Rebooting After a Lockup Battery Operating Time Preliminary Steps Page Clearing the Power-onPassword Page Running POST XX000YZZ 201-MemoryError Probable Cause Recommended Action 301-KeyboardError Keyboard failure Compaq Diagnostics Computer Checkup (TEST) View System Information (INSPECT) 5.Select View System Information (INSPECT) from the Diagnostics menu Diagnostic Error Codes Processor Test Error Codes Error Code Recommended Action Memory Test Error Codes Keyboard Test Error Codes Parallel Printer Test Error Codes Diskette Drive Test Serial Test Error Codes Hard Drive Test Error Codes Video Test Error Codes Page Audio Test Error Codes TouchPad/Pointing Device Interface Test Error Codes CD Drive Test Error Codes Page Troubleshooting Without Diagnostics Audio Memory Battery/Battery gauge PC Card Solving Audio Problems Solving Battery Pack and Battery Gauge Problems Computer is beeping and battery LED Battery charge is low Immediately save any open file(s) icon is blinking Then do any one of the following: Solving CD Drive Problems Solving Diskette and Diskette Drive Problems Solving Display Problems Display is blank and the Suspend icon is flashing System is in Suspend mode Display function was switched to the external monitor Use Fn + F2 to switch between LCD or CRT Using 1024 × 768 or higher Solving Hard Drive Problems Solving Hardware Installation Problems Solving Keyboard/Numeric Keypad Problems Solving Memory Problems Solving Minor Problems (continued) Contacting Compaq Support Shipping Preparation Page System Unit Mass Storage Devices Miscellaneous Cable Kit Miscellaneous Parts Documentation and Software Page Boards Description Spare Part Heatspreader 2.Processor 8.System Board, w/o processor 9.Memory Module 16-MB 32-MB 64-MB System Unit Boards Assembly Description Spare Part Mass Storage Devices Mass Storage Cable Devices MB Maintenance & Service Guide Presario 1600 Series Models: 1650 and Home Page Notice Power Cords Spare Part Number Modem Cables Page Miscellaneous Hardware and Plastics Kit Miscellaneous Hardware and Plastics Kit Spare Part Number: Quantity Door, Battery Pack Page Miscellaneous Parts 1. AC Adapter 2. Port Replicator Clock Battery System Unit Spare Part Number Boards Quick Restore CD Not Available Electrostatic Discharge Generating Static Page Service Considerations Tool and Software Requirements Screws Return to Removal & Replacement Procedures Cables and Connectors Cables ●Always handle cables by their connectors ●Avoid bending, twisting, or pulling on the cables ●Handle flex cables with extreme care; they can tear easily Plastic Parts Back to Top of Page Return to Removal & Replacement Procedures Preparing the Computer for Disassembly Battery Charger Board Display Panel Assembly not Removing the Battery Pack Electrostatic Discharge Page Removing the Palmrest Cover with Touch Pad It is not necessary to remove the display panel NOTE: assembly to access the interior components of the computer To remove the palmrest cover with touch pad, complete the following steps: Prepare the computer for disassembly 2. Close the computer and turn the computer upside down 3. Remove three Removing the Keyboard To remove the keyboard, complete the following steps: NOTE: Then remove the cable Refer to the section on Cables and Connectorsfor more information on removing a cable from the ZIF connector Removing the Heatspreader 4.Remove three screws from the heatspreader and lift out of the chassis the heatspeader, reverse the previous procedures Removing the Modem Page Removing the Processor Page Removing the Status Panel To remove the status panel, complete the following steps: Next Step Page Removing the Interface Board with Header To remove the interface board with header, complete the following steps: Prepare the computer for disassembly Remove the palmrest cover with touch pad Remove the keyboard Page Removing the 5.0-GBor 4.0-GBHard Drives Page Removing the Battery Charger Board To remove the battery charger board, complete the following steps: 4.Remove the hard drive 5.Remove the stiffener bracket and lift out of the chassis To replace the battery charger board, reverse the previous procedures When replacing the battery charger board, ensure NOTE: the pins are aligned with the connector on the system board Removing the CD Drive Page Removing the Display Panel Assembly Service Considerations Cables and Preparing the Carefully Display Panel remove the Upper CPU Removing the Upper CPU Cover Page Removing the Speaker Assembly To remove the speaker assembly, complete the following steps: 5.Remove the hard drive 6.Remove the stiffener bracket 7.Remove the display panel assembly Battery Charger Board Display Panel Assembly Page Removing the Diskette Drive Page Removing the Fan Assembly To remove the fan assembly, complete the following steps: Prepare the computer for disassembly 5.Remove the display panel assembly Replace the fan gasket, place the fan at a IMPORTANT: degree angle, and push forward to replace the fan assembly To replace the fan assembly, reverse the previous procedures Removing the System Board Page Removing the Memory Module