Troubleshooting Charts - IBM Academic System 6152 Quick Reference

Troubleshooting Charts
DISPLAY ACTION
PROBLEMS
Blank screen Check to see if:
plus no beeps.
1.
The system unit power cord is plugged into a
Note: If you are working electrical outlet and into the system unit.
not sure about 2. The cables connected to the system unit are tight.
the beeps, turn To do this, power off the computer and disconnect
the computer off, aI/ cables. Then reseat the cables, making sure
then on again. that they are properly connected and tight. Power
on the computer. (For information on where
cables connect, see pages 8 and 9.)
3.
The system unit power switch is on.
4. A math coprocessor just installed is instal/ed
correctly (see page 38).
If the above items are correct and the screen remains
blank, have the system unit serviced.
Blank screen Check to see if:
plus 1 beep.
1. The display power cord is plugged into a working
electrical outlet and into the display.
2.
The display is turned on and the Brightness and
Contrast controls are turned up.
3. The display signal cable is plugged into the
correct connector on the system unit. The correct
connector depends upon the type of display.
Some displays plug into the display connector.
Other displays plug into an adapter that may be
installed in an expansion slot. (See the display
connector on pages 8 and 9.)
If the above items are correct and the screen remains
blank, run the display tests described in the
instructions supplied with the display. If the tests show
the display is OK, have the system unit serviced.
Blank screen Have the system unit serviced.
plus 2 or more
beeps.
Only the cursor Have the system unit serviced.
( _ ) appears.
Screen is Run the display tests described in the instructions
unreadable or supplied with the display. If the tests show the display
distorted. is OK, have the system unit serviced.
Wrong Have the system unit serviced.
characters
appear on the
screen.
Solving Computer Problems
43