System Messages - Dell OptiPlex 755 User Manual

Code Cause
3-4-2 Screen retrace failure
3-4-3 Search for video ROM failure
4-2-1 No timer tick
4-2-2 Shutdown failure
4-2-3 Gate A20 failure
4-2-4 Unexpected interrupt in protected mode
4-3-1 Memory failure above address 0FFFFh
4-3-3 Timer-chip counter 2 failure
4-3-4 Time-of-day clock stopped
4-4-1 Serial or parallel port test failure
4-4-2 Failure to decompress code to shadowed memory
4-4-3 Math-coprocessor test failure
4-4-4 Cache test failure

System Messages

NOTE:
If the message you received is not listed in the table, see the documentation for either the operating system
or the program that was running when the message appeared.
Message
8042 Gate-A20
error
Address Line
Short!
C: Drive Error
C: Drive Failure
Cache Memory Bad,
Do Not Enable
Cache
Possible Cause
The keyboard controller
failed its test.
An error in the address
decoding circuitry in the
memory has occurred.
The hard drive is not working
or is not configured correctly.
The cache memory is not
operating.
Corrective Action
If you receive this message after you make
changes in the system setup program,
enter the system setup program and
restore the original value(s).
Reseat the memory modules (see
"Memory" on page 313).
Ensure that the hard drive is installed
correctly in the computer (see the "Drives"
section for your computer) and defined
correctly in the system setup program (see
"System Setup" on page 280).
See "Contacting Dell" on page 370 for
instructions on obtaining technical
assistance.
Solving Problems
351