Dell OptiPlex GX1 Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net PC S - Page 66

Gate A20 failure

Page 66 highlights

1-3-1 1-3-2 1-3-3 1-3-4 1-4-1 1-4-2 2-1-1 through 2-4-4 3-1-1 3-1-2 3-1-3 3-1-4 3-2-4 3-3-4 3-4-1 3-4-2 4-2-1 4-2-2 4-2-3 4-2-4 4-3-1 4-3-3 Main-memory refresh verification failure No memory installed Chip or data line failure in the first 64 KB of main memory Faulty or improperly seated DIMM or defective system board No memory installed or faulty or improperly seated DIMM Faulty or improperly seated DIMM Odd/even logic failure in the first 64 KB of main memory Address line failure in the first 64 KB of main memory Parity failure in the first 64 KB of main memory Bit failure in the first 64 KB of main memory Slave DMA-register failure Defective system board Master DMA-register failure Master interrupt-mask register failure Slave interrupt-mask register failure Keyboard-controller test failure Screen initialization failure Screen-retrace test failure Faulty keyboard controller (defective system board) Faulty video subsystem (defective system board) Search for video ROM failure No timer tick Defective system board Shutdown failure Gate A20 failure Unexpected interrupt in protected mode Memory failure above address 0FFFFh Timer-chip counter 2 failure Faulty or improperly seated DIMM Defective system board 3-2

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3-2
’HOO±2SWL3OH[±*;²³*;²S±0DQDJHG±3&±DQG±2SWL3OH[±1;²±1HW±3&±6\VWHPV±6HUYLFH±0DQXDO
1-3-1
Main-memory refresh verifi-
cation failure
Faulty or improperly seated
DIMM or defective system
board
1-3-2
No memory installed
No memory installed or faulty
or improperly seated DIMM
1-3-3
1-3-4
1-4-1
1-4-2
2-1-1
through
2-4-4
Chip or data line failure in the
first 64 KB of main memory
Odd/even logic failure in the
first 64 KB of main memory
Address line failure in the
first 64 KB of main memory
Parity failure in the first
64 KB of main memory
Bit failure in the first 64 KB of
main memory
Faulty or improperly seated
DIMM
3-1-1
3-1-2
3-1-3
3-1-4
Slave DMA-register failure
Master DMA-register failure
Master interrupt-mask regis-
ter failure
Slave interrupt-mask register
failure
Defective system board
3-2-4
Keyboard-controller test
failure
Faulty keyboard controller
(defective system board)
3-3-4
3-4-1
3-4-2
Screen initialization failure
Screen-retrace test failure
Search for video ROM failure
Faulty video subsystem
(defective system board)
4-2-1
4-2-2
4-2-3
4-2-4
No timer tick
Shutdown failure
Gate A20 failure
Unexpected interrupt in
protected mode
Defective system board
4-3-1
Memory failure above
address 0FFFFh
Faulty or improperly seated
DIMM
4-3-3
Timer-chip counter 2 failure
Defective system board
7DEOH±¶´²³±±3267±%HHS±&RGHV
±²FRQWLQXHG³
±
%HHS²&RGH
(UURU
3UREDEOH²&DXVHV