mt@cleo.cs.wisc.edu (Manolis Tsangaris) (09/18/90)
Netters, Help!
My 2 year old Apple high resolution color monitor (really a Sony Trinitron
monitor) on a MAC-II is acting crazy (:-)
SYMPTOMS:
When first started (cold) it seems to work ok.Then after about 15-20 minutes
it turns itself off. The green power light is turned off and so the screen is.
The power supply seems to work ok, producing the indicated voltages of
+67 V and +120 V. Both unloaded or under load.
The +15 V return line (I guess the one that signals the power
supply that everything is ok) is at first ok. At the time the
Monitor dies, it drops to -0.5 V (approximately) and stays there.
If you turn the monitor power switch off and then on again,
it will momentarily turn on, stay on for a few seconds and then die again.
If you wait a few minutes and repeat this, it will stay on again for more
time.
And now the bad news. The University repair center here, wants $50 just
to look at it. And an estimated amount of $200-300 to fix it. Before I make
them rich, does anyone have any suggestions, or have experienced a similar
problem? Any clues, or even any pointers to books that might help? I have some
experience with monitors, but there is nothing much I can do without schematics.
Thanks much!
--mt (Manolis Tsangaris)
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