Compaq 7470 - Presario - 64 MB RAM, Maintenance And Service Manual

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Extended RAM failed at
offset
nnn
Keyboard Error System Cache Error
Failing Bits nnn Operating System Not
Found System CMOS Checksum Bad
Fixed Disk 0 or 1 Failure Parity Check 1 System RAM Failed at Offset, nnn
Fixed Disk Controller Failure Parity Check 2 System Timer Error
Incorrect Drive A Type Real Time Clock Error UMB Upper Limit Segment
Address
nnn
Invalid NVRAM Media Type System Battery is Dead Video BIOS Shadowed
POST Messages
Error message Probable Cause Recommended Action
Diskette Drive A or
B Error
Drive A: or B: is present, but fails the
BIOS POST diskette tests
1. Run Setup .
2. Replace the signal cables.
3. Replace the drive.
Extended RAM
failed at offset nnn
Extended memory not working or not
configured properly
1. Replace the memory modules .
2. Replace the system board .
Failing Bits nnn nnn is a map of the bits at the RAM
address which failed the memory test
1. Run Setup .
2. Replace the system board .
Fixed Disk 0 or 1
Failure
Hard drive is not working or not
configured properly
1. Run Setup .
2. Replace the signal cable.
3. Replace the hard drive.
Fixed Disk
Controller Failure
Hard drive is not working or not
configured properly
1. Run Setup .
2. Replace the system board .
Compaq.com - Compaq Presario Maintenance and Service Guide - 7400 Series
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