AT&T 2.1.1 manual Screen Item, Cause of Failure, Bad controller Motherboard problem

Configuration Testing and Troubleshooting

Screen Item

CPU

CMOS RAM

ROM Checksum

Memory Refresh

DMA Controllers

Interrupt Controller

Keyboard

Dedicated memory

Base memory

Extended memory

Total memory

Clock/Calendar

Floppy disks

Hard disks

Cause of Failure

Motherboard problem

a. Battery backup problem b. Motherboard problem

a. ROM failure --replace ROM b. Motherboard problem

Motherboard problem

Motherboard problem

Motherboard problem

a. Pressed key while booting - reboot system b. Keyboard not plugged in

c. Keyboard bad - replace keyboard d. Motherboard problem

If not 0384 kB,

a. Memory problem - replace memory b. Motherboard problem

If not 0640 kB,

a. Memory problem - replace memory b. Motherboard problem

If not 3072 kB or more,

a. Memory problem - replace memory b. Motherboard problem

a. Memory problem - replace memory b. Motherboard problem

Motherboard problem

a. Poor connection b. Bad drive

c. Bad controller

d. Motherboard problem

a. Poor connection b. Bad drive

c. Bad controller

d. Motherboard problem

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