IBM 3151 Manual To Operations page 103

Solving Problems
6
Press and hold the
Ctrl
and
Shift
keys, then press the
Hold
key.
Does the test pattern appear on the screen as shown on page 5-17?
Yes Report this problem to your supervisor.
No Go to step 7.
7
Set the power switch to 0 (Off).
8
Disconnect the keyboard cable.
9
Set the power switch to
I
(On); wait ten seconds.
Does
IlpROBLEM
IN
KEYBOARD"
appear?
Yes The keyboard is failing. Replace the keyboard. See page 5-20 for
instructions.
No Go to step 10.
10
Look at the back side of the video element.
Is a cartridge inserted? (See Figure 5-1 on page 5-1 for location.)
Yes Set the power switch to 0 (Off); remove the cartridge; insert the
keyboard cable into the
v~deo
element, then go to step 11 on
page 5-11.
No Set the power switch to 0 (Off); insert keyboard cable into the ,video
element, then go to step 13 on page 5-11.
5-10
IBM3151 'Guide to Operations