Compaq MPAC-18 manual Maintenance, Troubleshooting Power-up

Maintenance

Cleaning: The touch screen should only be cleaned with Chemtronics (part # ES 1668) cleaner and a soft lint free cloth. The touch screen should be moistened with the cleaner, avoid rubbing the touch screen with a dry cloth. The touch screen can easily be scratched, it is very important to not to use excessive force or sharp objects.

Inspections: Quarterly inspections are recommended to ensure that vent holes on the back of the enclosure are unobstructed.

Troubleshooting

Power-up

Symptom	Possible Causes	Solution
Computer does not power up.	Power not on (PWR indicator is	Make sure that computer is
	not lit or display completely	plugged in. Make sure that
	dark).	power source is functioning
		properly.
Display is blank (PWR indicator	See “Display” topic in this	See “Display” topic in this
is lighted).	Section	Section
Non-System disk or disk	Disk in floppy disk drive.	Remove floppy disk and then
error message displayed.		reboot or cycle power .
Safe Recovery Error message	Occurs on initial power up if the	The computer will power up
displayed.	unit is accidentally turned off	normally.
	without first shutting down the
	Windows software.
Memory count during power-up	Optional DIMM is installed	Make sure that the appropriate
self-test is incorrect.	incorrectly or is incompatible	memory is installed correctly.
	with the DP027010 military
	computer CPU.
CMOS checksum error —	CMOS battery failure.	This battery has a lifetime of up
Defaults loaded		to 10 years under normal
CMOS battery failed		operating conditions. For more
message displayed.		information, see “CMOS
		Checksum Error” topic in this
		section.
A screen appears just after	The F2 key has been	Cycle power again. The
power-up, or just after reset,	accidentally pressed.	computer will power up
which has the title “CMOS		normally.
Setup Utility.”
The computer has reset even	The CTRL-ALT-DELkeys were	This should never be done,
though the power was not	pressed twice at the same	unless you are attempting to
interrupted.	time.	reset the computer.
A:> appears instead of	A system floppy disk is	Remove disk and cycle power.
software.	inserted.

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Copyright March 2003, Computer Dynamics, Inc.

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MPAC-18 Manual