Maker Pro
Maker Pro

IBM computer monitor G70

B

Bob

Jan 1, 1970
0
This is also model number 6544-403.

I get no display but there appears to be high voltage present.

Any help with a schematic diagram or service manual would be appreciated.

Bob
 
This is also model number 6544-403.

I get no display but there appears to be high voltage present.

Any help with a schematic diagram or service manual would be appreciated.

Just repaired one of these with the same symptom. Check the heater
voltage on the neck board (very well marked). This one had an open
zero ohm resistor near the flyback.
 
B

Bob

Jan 1, 1970
0
Thanks for the advice, but the CRT heater lights nicely. In fact, I was
looking at the monitor when it died; the display simply clicked off rather
than fading or blooming.

So I think it's something in the logic or drivers. I am not suspecting the
power supply, since the high voltage is still there. However, one thing -
when I push the button to degauss, it does nothing. Is that a clue?
 
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