Dell XPS 720 (Mid 2007) - Manual (Page 70)

70
Troubleshooting
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.
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
Message Possible Cause Corrective Action
8042 Gate-A20
error
The keyboard controller
failed its test. 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).
Address Line
Short!
An error in the address
decoding circuitry in the
memory has occurred. Reseat the memory modules (see
"Memory" on page 90).
C: Drive Error
C: Drive Failure
The hard drive is not working
or is not configured correctly. Ensure that the hard drive is installed
correctly in the computer (see "Drives" on
page 106) and defined correctly in the
system setup program (see "System Setup"
on page 166).
Cache Memory Bad,
Do Not Enable
Cache
The cache memory is not
operating. See "Contacting Dell" on page 179 for
instructions on obtaining technical
assistance.
Code Cause