Table 3-1. Post Beep Codes - Dell OptiPlex N Service Manual

3-2 Dell OptiPlex N Systems Service Manual

Table 3-1. POST Beep Codes

Beep Code Error
1-2 Video controller failure
1-3 Monitor not detected
1-1-3 NVRAM write/read failure
1-1-4 BIOS checksum failure
1-2-1 Programmable interval-timer
failure
1-2-2 DMA initialization failure
1-2-3 DMA page register write/
read failure
1-3-1 Main-memory refresh verifi-
cation failure
1-3-2 No memory installed
1-3-3 Chip or data line failure in the
first 64 KB of main memory
1-3-4 Odd/even logic failure in the
first 64 KB of main memory
1-4-1 Address line failure in the
first 64 KB of main memory
1-4-2 Parity failure in the first
64 KB of main memory
2-1-1 Bit failure in the first 64 KB
through of main memory
2-4-4
3-1-1 Slave DMA-register failure
3-1-2 Master DMA-register failure
3-1-3 Master interrupt-mask regis-
ter failure
3-1-4 Slave interrupt-mask register
failure
Probable Causes
Defective system board
Disconnected or faulty
monitor
Defective system board
Faulty BIOS or defective
system board
Defective system board
Faulty or improperly seated
DIMM or defective system
board
No memory installed or faulty
or improperly seated DIMM
Faulty or improperly seated
DIMM
Defective system board