User`s guide

Error tone codes for fatal errors (continued)

Error tone code Description

2-4-3

First 64KB RAM failure-bit E

2-4-4

First 64KB RAM failure-bit F

3-1-1

3-1-2

3-1-3

Slave DMA register failure

Master DMA register failure

Master interrupt mask register failure

3-1-4

Slave interrupt mask register failure

3-2-4

Keyboard/mouse controller test failure

Error tone codes for non-fatal errors

Error tone code

Description

3-3-4

Screen memory test failure

3-4-1

Screen initialization test failure

3-4-2 Screen retrace test failure

Power or lock-up Problems

If you are having trouble with the computer’s power or the

system locks up, see the suggestions below.

The computer does not start when you turn it on.

Turn off the power and check the following:

Be sure all cables are securely connected to the computer.

Check that the computer and monitor power cords are

plugged completely into their electrical outlets,

Test the outlet to see if it supplies power.

A-14 Troubleshooting