Re: IIc keeps tripping the circuit breaker

[mjmahon@aol.com (Michael J. Mahon)]

MN wrote:

>Thanks.  Re-tested it.  Its the monitor!  Tried plugging the monitor
>alone, the brick alone, and (brick + CPU) together.  The monitor trips
>it 100% of the time.
>
>Guess its time to search for a replacement monitor.  The funny thing
>is that the monitor still runs for a good 5-10 mins before tripping
>the breaker... although it is making some hissing sounds.
>
>Not very optimistic about repairing the monitor though... 

Interesting.  I thought that all monitor power supplies had
fuses that would blow long before any external breaker.
This is a fire prevention requirement.

It's possible that there is a line filter before the fuse, and that
one of the ceramic capacitors in the line filter is shorting and
popping the breaker.  But it must be one heck of a short very
near the line cord (or even _in_ the line cord--perhaps near
the strain relief?) to be able to pass enough current to produce
the symptom--repeatedly.

Yes, I'd bet that it is an intermittent short in the line cord.

-michael

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