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Optiquest V773 dead, no deguass at powerup

I have a 17" Optiquest V773 monitor (CRT display) that just spontaneously died tonight, and I'd like to figure out the fault and if it can be repaired.

What happened was I ran game (after setting the video resolution/depth options) and immediately when clicking to launch, the screen went black, I heard an unusually loud high pitched squeal and then video sync was lost. At this point, I could not get the On-Screen-Menu to appear which will normally report the monitor status (it should work without any video input source present).

The monitor is getting power, as the power LED lights up and turns green. However instead of hearing the tube degauss at power up, I just hear this faint high pitched buzzing that last approximately 6 seconds, then the power LED turns orange (to indicate no video sync). The On-Screen-Menu will not appear at this point. Opening the monitor I was able to trace the high pitch buzzing noise to the flyback transformer.

It would seem to me the flyback transformer is blown, or perhaps some component that allows it to feed voltage to the CRT (a blown capacitor?) is damaged.

I really like this particular display and would hate to have to give up on it. Before I do, I just like to know if this sounds like it could be repaired inexpensively.

Mitchell Spector

Reply to
Mitchell Spector
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That would be my best guess, from description. Used glass monitors (coming off lease and corporate surplus) are dirt cheap (< $50 for 21 inch models) .......

A good radio/TV repair shop (there are still a few around) could order the flyback for you.

gb

Reply to
gb

(coming

models)

Please, where can I find that deal?

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Reply to
Tom Del Rosso

I have one of those too. No-name version. It works well most of the time.

But once in a great while it makes a sound like an insect zapper and the picture blinks on and off in a split second.

And occasionally the horizontal size of the picture spontaneously changes to a slightly different size.

Mitchell Spector wrote:

Reply to
Richy

Open it up and look for signs of arcing around the flyback transformer, anode lead, and the suction cup anode cap on the tube, if you can't find any, run it with the cover off in a dark room and look for visible arcing when it makes that sound. If you're lucky it'll be something external to the flyback transformer that you can fix with silicone caulk.

Reply to
James Sweet

Hans Systems Westmont, IL

Sells on Internet as well as monthly at local computer show (College of DuPage) He has palettes of items coming "off lease" .. the school and education institutions usually visit him on regular basis. These type of companies exist throughout the US. Some disassemble the devices for repair parts they sell to repair shops (or even BACK to the OEM that built it !! .. that is how Ted Waitt (founder of Gateway) started in 1980s.

gb

Reply to
gb

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