Dell OptiPlex 790 (Early 2011) - Manual (Page 75)

Code 4–3–3
Cause Timer-chip counter 2 failure
Code 4–3–4
Cause Time-of-day clock stopped
Code 4–4–1
Cause Serial or parallel port test failure
Code 4–4–2
Cause Failure to decompress code to shadowed memory
Code 4–4–3
Cause Math coprocessor test failure
Code 4–4–4
Cause Cache test failure
Error Messages
Address mark not found
Description The BIOS found a faulty disk sector or could not find a particular disk
sector.
Alert! Previous attempts at booting this system have failed at
checkpoint [nnnn]. For help in resolving this problem, please note
this checkpoint and contact Dell Technical Support.
Description The computer failed to complete the boot routine three consecutive times
for the same error. Contact Dell and report the checkpoint code (nnnn) to
the support technician
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