At 12:03 PM 4/28/98 -0500, Steve Dias wrote:
>
>I have a Princeton EO70 monitor that worked fine for 10 months, then in
>the last two months it has failed to power up. Turning on the power
>switch, the LED will flicker on and off about twice per second, with a
>clicking sound, but the monitor will not power up at all. Sent the
>monitor back to be repaired under warranty (twice). Both times, they
>repaired or replaced "transistor Q411", and it worked, but only for a
>short while. After the first repair it died in one hour, the second
>repair lasted 5 days.
>    The last time it failed I was able to see that it occurred when I
>moved the mouse to "wake up" the monitor. The only power management I
>use is the screen saver one in Win98Beta 1650. I might add that all this
>started happening sometime after installing Win98 over Win95. My old 14"
>monitor works fine with the same system, and I'm using it right now.
>    My question is has anyone heard of this type of failure with a
>monitor? Is it possible that Win98 is sending a "bad" wake up signal
>that is frying the monitor start up circuit?, or do I just have a bad
>monitor?

Steve,

From my limited knowledge of monitor repairs, this sounds as if you
have a secondary issue with the monitor that the repair shop is not
finding.  Usually Princton monitors are very good units.  But, it could
be a bad solder joint or other component that is creating an
environment that is compromising the transistor.

The monitor tech that I use here in Boise told me about an odd case
where they had a customer who complained his monitor would just
go black.  He put it in his car and drove to the shop and it would
work fine.  The repair guy could not find a problem.   The customer
put it back in his car and drove home..  and as you guessed, it
did not work at home.   When he returned with the monitor and
it worked fine in the shop, the now irate customer was beside himself.

It turned out that their was a bad solder joint in the monitor.  The
ride down a gravel road from the customers home to the shop
would cause it to make contact and the unit would work, making
it near impossible to find the problem.  The repair guy, with the
customer out of view, gave the monitor a 'wack' and it stopped
working.  Now it was easy for him to trace down the problem.

Your tale reminded me of this story...    sorry I can not add any
more than this second hand  tale.  Maybe it will help  your
repair guy to start thinking in a new direction, (though I do not
recommend 'whacking' a monitor).....  *grin*



BOB WRIGHT  -   [log in to unmask]  - http://nospin.com
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