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

Page: 142 / 196

Incorrect Drive A
Type
Type of diskette in drive A: not
correctly identified
1. Run Setup .
2. Replace the diskette drive .
Invalid NVRAM
Media Type
Problem with NVRAM (CMOS) access Replace the system board .
Keyboard Controller
Error
Keyboard, I/O keyboard controller (on
system board), or mouse error
1. Replace the keyboard.
2. Replace the mouse.
3. Replace the system board .
Keyboard Error Keyboard, I/O keyboard controller (on
system board), or mouse error
1. Replace the keyboard.
2. Replace the mouse.
3. Replace the system board .
Operating System
Not Found
Operating system cannot be located on
either drive A: or C:
Run Setup .
Parity Check 1 Parity error found in the system bus 1. Run Setup .
2. Replace the memory modules .
3. Replace the system board .
Parity Check 2 Parity error found in the I/O bus 1. Run Setup .
2. Replace the ISA board (modem) .
Real Time Clock
Error
Real-time clock fails BIOS test Replace the system board .
System Battery is
Dead
RTC battery is dead 1. Replace the RTC battery .
2. Run Setup .
System BIOS
Shadowed
System BIOS copied to Shadow RAM Status message. No action required.
System Cache Error RAM cache failed the BIOS test Run Setup .
System CMOS
Checksum Bad
CMOS is corrupted or modified
incorrectly
Run Setup .
System RAM Failed
at Offset, nnn
System RAM failed Replace memory modules .
Compaq.com - Compaq Presario Maintenance and Service Guide - 7400 Series
http://www.compaq.com/athome/support/msgs/7400/post.html (3 of 4) [1/8/2002 3:52:58 PM]