LCD - half blank

[JohnPC]

I've had my projector assembled and in use for about a week now. It's been working fine for hours at a time, never seemed to have any problems.

The other day I left it on and went to the other room for a bit. When I came back the whole right half of the screen had become vertical lines. I turned the panel off and on, which seeemed to fix it. Minutes later the whole right side of the screen had become pure white.

I took the panel out of the projector, took out and replaced all the cables, and it worked. Then I put it back in and... the right half was white again.

As far as I can tell all the cables are correctly inserted (I'll try again later tho). I hadn't connected the ground points since it worked fine as is, but today I *did* connect the points, which didn't help any.

I'm not sure what to do right now. The projector didn't seem to be overheating when the problem started. Any suggestions?

Monitor is a Polyview PT-518A btw.

 

[cbm5]

Sounds like you've got a connection issue with the thin plastic connectors going to the very edge of the LCD glass. Those are stuck on with glue, if your projector is too warm and there is any tension on the connectors, they can slowy pull away. That's what I'd check.

 

[JohnPC]

Hmm, what could I do to check those? I've tried to push the board they're connected to towards the panel. Maybe I'm not giving it enough force (trying to be gentle) but there didn't seem to be any effect. No glimpses of a working screen or anything.

What really puzzles me is that it's only the right half of the screen. Wouldn't a connection problem affect the whole screen?

 

[cbm5]

Nope, my current display has one cracked connector and there is a white bar up one edge, but the rest of the screen works fine. And another dead one I've seen only had the bottom third working. I know that was LCD-to-flmsy connector problem too, the plastic had come unstuck from the glass. Very, VERY fragile stuff.