Dell OptiPlex GL Service Manual - Page 36

Table 3-1. POST Beep Codes (continued) Beep Code Error Probable Causes 1-3-1 Main-memory refresh verifi- Faulty or improperly seated cation failure DIMMs or defective system board 1-3-3 Chip or data line failure in the Faulty or improperly seated first 64 KB of main memory DIMMs 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 through 2-4-4 3-1-1 Bit failure in the first 64 KB of main memory Slave DMA-register failure Defective system board 3-1-2 Master DMA-register failure 3-1-3 Master interrupt-mask register failure 3-1-4 3-2-4 3-3-4 3-4-1 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 video expansion card) 3-4-2 4-2-1 Search for video ROM failure No timer tick Defective system board 4-2-2 Shutdown failure 4-2-3 Gate A20 failure 4-2-4 4-3-1 Unexpected interrupt in protected mode Memory failure above address 0FFFFh Faulty or improperly seated DIMMs 3-2 Dell OptiPlex GXpro Systems Service Manual