IBM X.25 manual Data, Problem Determination Procedures4-5

Blank	Screen, Blinking Cursor, or Non-Decipherable
Data

If your screen is completely blank or has a blinking cursor or non-decipherable data, do the following:

1. Set the Power switch on the system unit to Off.

2.If only one co-processor adapter is installed, repeat the diagnostics for your personal computer system to verify that your system is functioning correctly. If your system is functioning correctly, stop the procedures and replace the co-processor adapter that is installed.

Note: For instructions on removing (and replacing) a co-processor adapter, see the “Removal and Replacement Procedures” on page 4-17.

If more than one co-processor adapter is installed, remove all the adapters; then continue with the following step.

3.Insert your copyIBMof Realtimethe Interface Co-Processor: Advanced Diagnosticsinto diskette drive A, if previously removed.

4. Set the Power switch on the system unit to On.

The	screen	that appears	should	look similar to the screen on page
4-4.
DOES	THE SCREEN	LOOK SIMILAR TO THE	ONE SHOWN	ON
PAGE	4-4?

NO Repeat the diagnostics for your personal computer system to verify that your system unit is functioning correctly. If your system unit is functioning correctly,IBM Realtimeyour

Interface Co-Processor: Advanced Diagnosticsdiskette may be defective.

YES Press 0 (RUN	DIAGNOSTIC ROUTINES); then press Enter
and continue	to the next page.

A screen similar to the following may appear.

Problem Determination Procedures4-5