Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

 
 
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Default Gateway (blech) plasma "displays offscreen"

Hi,

I rescued a Gateway GTW-P46M103 plasma TV. Apparently,
these were "dogs" (?). But, for free, the price was just
too hard to resist! ;-)

[I haven't powered it up in a while so I am recalling
symptoms from memory -- essentially, looking for ideas
to test NEXT time I drag it out]

The unit powers up. Before the DTV switch (yes, that
is how long it has been neglected, here), it would
receive analog broadcasts but display them "offscreen".
I.e., imagine dragging the image (the entire rectangle
that surrounds it) up and to the left so that only
the right side and bottom remain visible on the
physical screen. (!)

Note that the annunciators/indicators that the TV would
normally display "on screen" (volume level, channel, etc.)
still appear where they were supposed to -- often in those
parts of the screen that the video image seems to be avoiding!
(i.e., the panel appears operative "everywhere"; its just
trying to get the video to fit onto the screen where it is
*intended* that is the problem).

At the very least, I figured I could try alternate inputs
(PC, VCR, etc.) to see if the problem is related to a particular
portion of the circuit (e.g., if the tuner is putting out bad
sync information).

Of course, any sort of documentation is unobtainable.
It also appears that replacement parts may be an issue
with these. From the posts I have seen related to
Gateways products, it almost appears that there was
a *feud* between the maker of the TV and Gateway just
prior to Gateway's demise and the manufacturer almost seems
delighted NOT to support the product (?)

Any pointers on where to start? Otherwise I can probably just
part it out on eBay (since parts seem to be so difficult to
obtain, I imagine there must be a market for them!)

Thanks!
--don
 
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