Wells Gardner D9800 beep with blank screen

[cedde]

Hello,

I have a WG D9800, and the screen went blank (while switching resolution from 640×240 to 640×480, coincidence i guess?) and the only thing the monitor does now it’s a 1 sec high pitch noise every ~30s,

any idea what can be the faulty part or problem?

I’m in novi michigan and my cabinet after 3 years in a storage was back home and run less than an hour :/ (so technically, the monitor is new).

[qrz]

Hout xistor might have shorted . could have a shorted diode in smps as well..

grab a meter and check

[MonMotha]

This seems to happen a lot on digital multisyncs when there's a resolution change.  The monitor has to react fast to switch out all the necessary circuitry, and I don't think it can always react fast enough.  Results in distorted waveforms and blown components.  WG will insist this isn't a problem, but evidence suggests otherwise.

Personally, I like to avoid excessive mode changes (e.g. run your frontend and what games you can at the same scanrate if you're doing a MAME setup).

Then again, these things also seem to have a tendency to blow up out of the box like yours did.  A friend lost a Sanwa 29PFX with less than 24 hours on it.  Seller was nice enough to swap it out, at least.

But yeah, check the components qrz listed.  They're usually the culprits.  Sometimes there's a relay on an s-correction cap that dies which causes the more visible failure.

[cedde]

Thanks for helping,

My skills are very limited for that problem. I found in my area few tv (crt) repair, Just wondering now if they will able to fix an arcade monitor.
I also have the schematics, if someone could point me the component to check that would be awesome d9800