Service manual

Troubleshooting Your Computer: Dell Latitude CP
4-2-1 No timer tick Call Dell for technical assistance. (For
instructions, see
Getting Help.)
4-2-2 Shutdown failure Call Dell for technical assistance. (For
instructions, see Getting Help.)
4-2-3 Gate A20 failure Call Dell for technical assistance. (For
instructions, see
Getting Help.)
4-2-4 Unexpected interrupt in protected mode Call Dell for technical assistance. (For
instructions, see Getting Help.)
4-3-1 Memory failure above address 0FFFFh Run the RAM test group in the Dell
Diagnostics. (For instructions, see Running
the Dell Diagnostics.)
4-3-3 Timer chip counter 2 failure Call Dell for technical assistance. (For
instructions, see Getting Help.)
4-3-4 Time-of-day clock stopped Call Dell for technical assistance. (For
instructions, see
Getting Help.)
4-4-1 Serial port failure Run the Serial/Infrared Ports test group in the
Dell Diagnostics. (For instructions, see
Running the Dell Diagnostics.)
5-1-2 No usable memory Run the RAM test group in the Dell
Diagnostics. (For instructions, see
Running
the Dell Diagnostics.)
NOTE: For the full name of an abbreviation or acronym used in this table, see the Glossary in the
online system User's Guide.
Finding Software Solutions
Because most computers have several application programs installed in addition to the
operating system, isolating a software problem can be confusing. Software errors can also
appear to be hardware malfunctions at first. Software problems can result from the following
circumstances:
● Improper installation or configuration of a program
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