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3-2 Dell Dimension XPS H233 and XPS H266 Systems Service Manual
Table 3-1. POST Beep Codes
Beep Code Error Probable Causes
1 Memory refresh failure. Defective system board.
2 Memory parity error. A SIMM is faulty. Replace
all of the SIMMs.
Defective system board.
3 Memory failure occurred in
first 64 KB of main memory.
A SIMM is faulty. Replace
all of the SIMMs.
4 Timer failure. A SIMM is faulty. Replace
all of the SIMMs.
Defective system board.
5 Microprocessor error. Defective microprocessor.
6 Gate A20 failure. Defective system board.
7 Microprocessor-exception
interrupt error.
Defective microprocessor.
8 Video memory read/write
error.
System’s video adapter is
missing or faulty.
9 ROM checksum value does
not match value encoded in
system BIOS.
Corrupted system BIOS
program.
Defective system BIOS
chip.
10 NVRAM shutdown register
read/write error.
Defective system board.
11 Cache memory error. Defective microprocessor.
1–2 No video adapter detected. Defective or missing video
adapter.
1–3 No monitor detected. Defective or missing
monitor.