Acer TravelMate 4750 - Manual (Page 69)

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Troubleshooting
This chapter shows you how to deal with common system problems. 
Read it before calling a technician if a problem occurs. Solutions to more 
serious problems require opening up the computer. Do not attempt to open 
the computer yourself; contact your dealer or authorized service center 
for assistance.
Troubleshooting tips
This notebook PC incorporates an advanced design that delivers onscreen error
message reports to help you solve problems.
If the system reports an error message or an error symptom occurs, see "Error
messages" below. If the problem cannot be resolved, contact your dealer. See
"Requesting service" on page 48.
Error messages
If you receive an error message, note the message and take the corrective
action. The following table lists the error messages in alphabetical order
together with the recommended course of action.
Error messages Corrective action
CMOS battery bad Contact your dealer or an authorized service center.
CMOS checksum error Contact your dealer or an authorized service center.
Disk boot failure Insert a system (bootable) disk, then press
to reboot.
Equipment
configuration error Press (during POST) to enter the BIOS utility,
then press Exit in the BIOS utility to reboot.
Hard disk 0 error Contact your dealer or an authorized service center.
Hard disk 0 extended
type error Contact your dealer or an authorized service center.
I/O parity error Contact your dealer or an authorized service center.
Keyboard error or no
keyboard connected Contact your dealer or an authorized service center.