Dell 4691901 Error Messages, Address mark not found, Code Cause Time-of-day clock stopped

Code	4–2–1
Cause	No time tick
Code	4–2–2
Cause	Shutdown failure
Code	4–2–3
Cause	Gate A20 failure
Code	4–2–4
Cause	Unexpected interrupt in protected mode
Code	4–3–1
Cause	Memory failure above address 0FFFFh
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.

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