Memory Tests Terminated By Keystroke; No Boot Device Available; No Timer Tick Interrupt; Not A Boot Diskette - Dell OptiPlex 990 Mini-Tower Service Manual

Memory tests terminated by keystroke

Description

No boot device available

Description The computer cannot find the floppy disk or hard drive.
No boot sector on hard-disk drive
Description The computer configuration information in System Setup may be
incorrect.

No timer tick interrupt

Description A chip on the system board might be malfunctioning.
Non-system disk or disk error
Description The floppy disk in drive A does not have a bootable operating system
installed on it. Either replace the floppy disk with one that has a bootable
operating system, or remove the floppy disk from drive A and restart the
computer.

Not a boot diskette

Description The operating system is trying to boot to a floppy disk that does not have a
bootable operating system installed on it. Insert a bootable floppy disk.

Plug and play configuration error

Description The computer encountered a problem while trying to configure one or
more cards.
82
A keystroke interrupted the memory test.