omarale
Member
Hi everybody!, looking for schem of Wells gardner LCD model WGF3299-SIAS82G, 32 inch, DVI and VGA input, I´d really appreciate any help, thanks in advance
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I'm just curious as to how old this LCD is ?
Capacitor plague? Yeah, that's a very real possibility.
I'm just curious as to how old this LCD is ?
Capacitor plague? Yeah, that's a very real possibility. He ordered a new logic board though, by the sounds of it.
omarale: If you get the new logic board and it's still fritzing out, replace all the electrolytic capacitors on the power board. You're probably getting ripple in your 12V, which a multimeter won't pick up.
I ´ll see the part price first, if they ask much, I ´ll rather build a PIC logic to restart power if that 5 volt aren´t present...
Got a picture of the boards in question?
I have more Fault Finding Techniques.
Things to watch for are:
How the power led reacts to things.
like is it always green never goes to orange red etc?
Disconnect the lnverter power and ribbon to inverters
then use a flashlite to see if any video on screen
i would agree if no video then its proably not a lamp or inverter problem.
more towards a bad t-con or scaler board,panel. you can't assume you need to check!
When you disconnect the lvds cable to the t-con board
the board at the top of panel, the cable from the scaler to the t-con..
remove it from the t-con then power up does the back lights stay on?
I understand the lamps stay up and video when you force it,but is the picture perfect
when you do this????? Got a picture of the image on screen with video and OSD??
is the brightness bright enough?
independent circuit troubleshooting can lead you towards a defective board or part
rather then TS a group of boards and parts at the same time.
There are tools to check inverters and lamps search the web for tools.
If needed,if you like send me the t-con and or scaler board and i will put it
in a working monitor to check it.Just pm me.