Hardware Maintenance Manual
Page 95
... read-write error 1-2-2-3 ROM BIOS check error 1-2-1 Programmable Interval Timer failed 1-2-2 DMA Initialization failed 1-2-3 DMA page register write/read failed 1-2-4 RAM refresh verification failed 1-3-3-1 1st 64K RAM test failed 1-3-2 1st 64K RAM parity test failed 2-2-3-1 Interrupt vector loading test failed 2-1-1 Secondary DMA register failed 2-1-2 Primary DMA register failed 2-1-3 Primary interrupt mask register failed...
... read-write error 1-2-2-3 ROM BIOS check error 1-2-1 Programmable Interval Timer failed 1-2-2 DMA Initialization failed 1-2-3 DMA page register write/read failed 1-2-4 RAM refresh verification failed 1-3-3-1 1st 64K RAM test failed 1-3-2 1st 64K RAM parity test failed 2-2-3-1 Interrupt vector loading test failed 2-1-1 Secondary DMA register failed 2-1-2 Primary DMA register failed 2-1-3 Primary interrupt mask register failed...
Hardware Maintenance Manual
Page 115
... system board (see "Power supply connectors" on the computer to re-test the system. 4. Extended video memory g. External Cache RAM i. Repeat steps 1 through 3 until you isolate the failing device or adapter. a. Non-IBM devices b. If the voltages are not within tolerance, continue with the next step. Memory modules f. External devices (modem, printer...
... system board (see "Power supply connectors" on the computer to re-test the system. 4. Extended video memory g. External Cache RAM i. Repeat steps 1 through 3 until you isolate the failing device or adapter. a. Non-IBM devices b. If the voltages are not within tolerance, continue with the next step. Memory modules f. External devices (modem, printer...