Personal Computer User Manual

26 About Your System
Gate A20 failure Faulty keyboard controller; faulty
system board.
See "Getting Help" on page 129.
General failure The operating system is unable to
carry out the command.
This message is usually followed by
specific information. Note the
information and take the appropriate
action to resolve the problem.
Invalid NVRAM
configuration, Resource
Re-allocated
System detected and corrected a
resource conflict.
No action is required.
Keyboard Controller
failure
Faulty keyboard controller; faulty
system board
See "Getting Help" on page 129.
Manufacturing mode
detected
System is in manufacturing mode. Reboot to take the system out of
manufacturing mode.
Memory address line
failure at
address , read
value expecting value
Faulty or improperly installed memory
modules.
See "Troubleshooting System Memory"
on page 106.
Memory double word logic
failure at
address , read
value expecting value
Memory odd/even logic
failure at
address , read
value expecting value
Memory write/read failure
at address, read
value
expecting
value
Memory tests terminated by
keystroke.
POST memory test terminated by
pressing the spacebar.
Information only.
No boot device available Faulty or missing optical/diskette
drive subsystem, hard drive, or hard-
drive subsystem, or no boot disk in
drive A.
Use a bootable diskette, CD, or hard
drive. If the problem persists, see
"Troubleshooting a Diskette Drive" on
page 108, "Troubleshooting an Optical
Drive" on page 109, and
"Troubleshooting a Hard Drive" on
page 110. See "Using the System Setup
Program" on page 31 for information
about setting the order of boot devices.
Table 1-8. System Messages (continued)
Message Causes Corrective Actions