Dell OptiPlex 990 (Early 2011) - Manual (Page 80)

Hard-disk drive controller failure
Description The hard drive failed initialization.
Hard-disk drive failure
Description The hard drive failed initialization.
Hard-disk drive read failure
Description The hard drive failed initialization.
Invalid configuration information-please run SETUP program
Description The computer configuration information does not match the hardware
configuration.
Invalid Memory configuration, please populate DIMM1
Description DIMM1 slot does not recognize a memory module. The module should be
re-seated or installed.
Keyboard failure
Description A cable or connector may be loose, or the keyboard or keyboard/mouse
controller may be faulty.
Memory address line failure at address, read value expecting
value
Description A memory module may be faulty or improperly seated. Reinstall the
memory modules and, if necessary, replace them.
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