NetNews Usenet Archive 1992 #16/NN_1992_16.iso/spool/sci/electron/13133

Internet Message Format | 1992-07-22 | 1.7 KB

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From: [e-mail] (Bill Dorsey)
Newsgroups: sci.electronics
Subject: Diagnosing Monitor
Message-ID: <[e-mail]>
Date: 22 Jul 92 21:40:26 GMT
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I transported a pc-clone computer (386) and what used to be a $550 color monitor
3000 miles in a van a month or so back.  I packed the monitor in the original
shipping container, so figured it would be safe from shipping damage.

Well, I just recently got around to hooking the thing up.  It has developed a most
annoying problem since I last used it.  An intermittent, non-periodical horizontal
flicker is now manifesting itself often enough to make me not want to use the
computer.  The flicker only affects a portion of the screen when it occurs
(typically 5-20% of the vertical size of the screen), and seems to perturb the
left and right edges of the screen (and everything in between) equally, and in a
sinusoidal pattern.

The problem occurs independently of the video mode the PC is in, and the video card
passes the manufacturer-supplied diagnostics.  I've checked all connections
carefully, and can find no problem with them.

The monitor is a TVM Supersync monitor (model 5A).  Could this be a problem I might
be able to track down with the aid of an oscilloscope but without a service manual?
Failing that, where would I take something like this to have it repaired?  If
the repair costs exceed $100, then I may as well junk the thing since I can buy
a better monitor than the TVM used for as low as $150.

Thanks.

- Bill Dorsey