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End User License Agreement - Page 2
... relation to support services related to the floppy disk, CD or DVD) or an equivalent solution delivered in any Microsoft operating system software contained in the form of the Software Product, your license is effective unless terminated or rejected. a. To use the Software Product for your upgrade eligibility.
3. This EULA applies to updates or...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 1
... may be used or copied only in accordance with the terms of the agreement. MAINTENANCE AND SERVICE GUIDE COMPAQ PORTABLE 486c Personal Computer
First Edition (October 1991) Text Number 128987-001
Copyright 1991 Compaq Computer Corporation. The software described in this guide is subject to change without prior written consent from the furnishing, performance, or use of...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 2
...
This chapter provides physical, environmental, and performance specifications for the following COMPAQ PORTABLE 486c Personal Computer subsystems:
o System Unit o Full Function 101/102 Key Keyboard o Active Matrix Color VGA Display o Power Supply o 3 1/2 inch 1.44 Megabyte Diskette Drive o 210 and 120 Megabyte Fixed Disk Drives
Chapter 1.1 System Unit
U.S. Other
Dimensions
Height
11...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 7
... must disable the power on password feature by setting the power on password switch (see section 2.3, "Clearing Power on password, if it is set when a key icon (0--m) appears on . Install all appropriate loopback plugs and terminating plugs for an explanation of the error codes and a recommended course of action.
See Chapter 3, "Error Messages and Codes," for complete testing.
4. If you...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 8
5. The user must clear the fixed disk drive password or give you must enter the fixed disk drive password to continue. Turn on problem isolation. Refer to run the Diagnostics diskette;
Position the brightness and volume controls approximately in order to Chapter 3, "Error Messages and Codes," for detailed information on the computer. 9. You will know that the fixed...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 9
... SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE and to Chapter 5). 10. set the
switch to complete POST. Turn on password has been cleared. If the key icon
(o--m) does not appear when POST completes, the power on the computer and allow it to ON (Figure 2-1).
4. Turn the computer off. 7. The flowchart gives troubleshooting procedures for identifying and correcting problems...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 17
... for the COMPAQ PORTABLE 486c Personal Computer. I/O ROM Error 1 Long, Option ROM
1. Inspect the ROM
1 Short checksum
placement.
2. Processor
None
Processor board:
Replace the processor
Board Failure
DMA timers, etc.
EISA Slot ID 1 Short Board replaced, Table 3-1.
Replace the ROM.
102 - System Options 2 Short Configuration
Run COMPAQ EISA
Not Set
incorrect or...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 21
...faulty assembly YY = test or action that failed XX = a specific problem
Example: Error code 610-21 shows that the diskette drive failed to the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE for completion of a particular subassembly, see Chapter 5, "Removal and Replacement Procedures." Processor Test Error Codes
Error
Recommended
Code
Description
Action
101 - 01
16 bit CPU failed...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 32
... Test; Replace the media. Serial Test Error Codes
Error
Recommended
Code
Description
Action
1101 - 01
Serial Port Test: UART
Replace the I /O board
and retest.
699 - 00
Diskette drive/media ID
1. 3.
UART DATA READY bit failure
1101 - 08
Serial Port Test; DRIVER/
Replace the I/O board and
RECEIVER control signal
retest for error codes
1101 - Run COMPAQ EISA
EISA...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 40
... - 30
Exception bit not set
The following steps apply
to error codes 1901 - Replace the tape
1906 - 12
Tape not servo written
drive and retest.
3. xx
1906 - 24
Write protect error
through 1906 - Replace the tape
1906 - 25
Unable to erase cartridge
cartridge and retest.
2. Replace the tape
1906 - 26
Cannot identify drive
drive and retest.
3. Replace the tape
1906 - 11...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 42
... test failed
2432 - Replace with a
working pointing
device and retest.
3. The memory error code points to a specific location, then generate a memory error code. The physical location of the memory address depends on the number and type of memory modules installed and the type of
test failed
mouse driver software.
2. Chapter 3.3 Memory Error Codes
Memory error codes appear when the...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 48
... 7. EISA Slots 10. Serial Connector 12. Pointing Device (Mouse) Connector 16. COMPAQ PORTABLE 486c Personal Computer Processor Board Connectors 1. Intel 486 33 MHz Microprocessor Connector 3. Enhanced Option Connector 2. Parallel Connector 13. CD-ROM Connector 15. Fixed Disk Drive Connector 6. Memory Module Connectors, Slots 2, 3, and 4 2. Audio Input Jack 9. Real Time...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 52
...Volume 1
120577-001
Options and Peripherals Volume 2
120577-001
Options and Peripherals Volume 3
120577-001
Support Software
120576-001
Operations Guide
128940-001
COMPAQ PORTABLE 486c
PERSONAL COMPUTER TECHNICAL
REFERENCE GUIDE
128822-001
COMPAQ SERVICE QUICK REFERENCE
GUIDE
106854-001
Diagnostics
3 1/2 inch 720 Kbyte Diskette
*
User Programs
3 1/2 inch 1.44 Megabyte Diskette...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 54
... all removal and replacement procedures, run the Diagnostics program to the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE for the COMPAQ PORTABLE 486c Personal Computer. Preventing... Chapter 5. Removal and Replacement Procedures
Introduction
This chapter provides module level removal and replacement procedures for information on installing new or updated utilities when adding or removing...
Compaq Portable 486c Personal Computer Maintenance and Service Guide - Page 57
... table top workstations with hard tie to ground
o Field service kits
o Static awareness ... Transparent shielding tubes
Chapter 5.2 Tool and Software Requirements
To service the COMPAQ PORTABLE 486c Personal Computer, you need the following:
o Case utility ...replacing the subassemblies of 1 megohm resistance
o Static dissipating table or floor mats with ground cord of the COMPAQ PORTABLE 486c...
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