Compaq Presario 7400 Series - Page 142

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]