RAM Check

The computer now begins to check the RAM installed on the main system board and any option cards. During the check, you see this message:

nnnKB OK

where nnn indicates the amount of memory in which no malfunction is found. This value increases continuously by 64KB up to the amount of RAM installed on the main board, which is 640KB. If the computer detects an error in the first 64KB area, it displays an error message and halts with no further information.

If there are faulty RAM chips in your system, you see this message:

nnnn0 201-Memory error

Give the error message and number to your Customer Care Center.

Keyboard Controller and Keyboard Check

Next, the computer checks the keyboard controller and keyboard for problems such as failure of one of the keys to release. If there are any errors in the connection between the keyboard and the computer, you see this error message:

301-Keyboard error

When a number precedes this message, the number represents the key (in hexadecimal) that is causing the error. This message may occur after you have used Ctrl Alt Del to reset the computer, and does not necessarily indicate a problem.

Power-On Diagnostics B-3