Dell OptiPlex 990 Mini-Tower - Page 75

Code 1-1-2
Cause Microprocessor register failure
Code 1-1-3
Cause NVRAM
Code 1-1-4
Cause ROM BIOS checksum failure
Code 1-2-1
Cause Programmable interval timer
Code 1-2-2
Cause DMA initialization failure
Code 1-2-3
Cause DMA page register read/write failure
Code 1-3-1 through 2-4-4
Cause DIMMs not being properly identified or used
Code 3-1-1
Cause Slave DMA register failure
Code 3-1-2
Cause Master DMA register failure
Code 3-1-3
Cause Master interrupt mask register failure
Code 3-1-4
Cause Slave interrupt mask register failure
Code 3-2-2
Cause Interrupt vector loading failure
75