MITSUBISHI ELECTRIC MS540 - Manual (Page 49)

T R O U B L E S H O O T I N G
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Check also that the front window is not obscured on either the
system unit or the handset. Periodic cleaning with a soft lint-free
cloth is advised.
System BIOS
Check the system BIOS to ensure that it has not been disturbed from
the original settings. If the settings appear to have altered, there may
be a fault with the BIOS battery. See Appendix B, ‘System
Motherboard’ and Appendix C ‘System BIOS and set-up’.
The system’s disk drives
Refer also to the chapter on using the ‘system drives’.
Floppy disk drives
If you have problems accessing a diskette or floppy disk, check that
it is inserted correctly, that it has been correctly formatted, that is not
write-protected, and that the permissions assigned by the BIOS
allow the intended access. Some application software may not allow
you to read or write to floppy disks while performing certain other
tasks, or waits until you are about to exit the programme.
CD-ROM drives
If you have problems accessing a CD, check that you have allowed a
few seconds for the disk to spin up to full speed, that the disk is the
correct way up in the drive and that it is a data CD. Remember that
you cannot save your data onto a CD with a conventional CD drive
and disk.
Hard disk drives
If you have problems accessing your hard disk drive, check that the
controller to which the drive is connected is enabled, that the disk
has been correctly formatted, and that the permissions assigned by
the BIOS or the software that you are using allow the intended
access.