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XG75 won't sync / display menus after power failure

 
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acrawley



Joined: 20 Jun 2006
Posts: 18
Location: Redmond, WA

Posted: Fri Oct 29, 2010 9:09 am    Post subject: XG75 won't sync / display menus after power failure

I lost power for a few minutes a day or two ago. I didn't think anything of it until tonight, when I tried to use the projector for the first time since the power loss. When I turned it on, it just sat there displaying nothing for much longer than usual, before briefly flashing up an out-of-convergence image, then returning to black for a while, etc. Trying to bring up a menu during the brief interludes where the picture was present just resulted in a bunch of static-y noise, but the "unregistered signal" text is fine.

I found that if I switched inputs back and forth a few times, I would sometimes luck out and get a stable (but still wavy and out of convergence) picture and working menus, but trying to do anything that writes to memory (creating a new input, etc) would "crash" the projector - once the menu remained visible, but all the letters were replaced with symbols and patterns, another time it just sat there refusing to respond to input, once the video parameters or something went completely out of whack and the projector started making a strange noise (I shut it down in a hurry! Shocked)

I captured the following video of the symptoms:
http://www.youtube.com/watch?v=1DnorBXqQi0

Sorry about the video quality. My old camera has also decided it hates me, and the new camera doesn't record video, so I had to use my phone.

At 0:04, I turn on the projector
At 0:21, the input appears (badly out of alignment, etc) It almost immediately "loses sync", and the screen would be going black except that I disabled "picture mute on input change" one of the times that the menu worked briefly.
At ~0:34, it tries to resync, and I try to bring up the "info" window, which just results in dark static near the top
At 0:40, I switch to a disconnected input
At 0:53, the "no input" / "unregistered signal" text is briefly visible before it goes back into the resync loop

I've tried using my HTPC (720p), the Wii (480p), and an old VCR (480i / NTSC) as input, and all sources have done the same thing. I've reseated all the cards in the card cage, too.

Any ideas, or am I completely boned here?
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Curt Palme
CRT Tech


Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC

TV/Projector: All of them!

Posted: Fri Oct 29, 2010 12:54 pm    Post subject:

Usually this is a bad system board. Let me know if you want to send it in and I"ll test it in a unit here.
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acrawley



Joined: 20 Jun 2006
Posts: 18
Location: Redmond, WA

Posted: Fri Oct 29, 2010 5:28 pm    Post subject:

Ugh, that's what I was afraid of. Are those boards repairable yet, or is it still wholesale replacement from an ever-dwindling stock?

Where should I send it?
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Curt Palme
CRT Tech


Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC

TV/Projector: All of them!

Posted: Fri Oct 29, 2010 6:24 pm    Post subject:

Yes and yes. Shoot me an email to curtpalme@shaw.ca

Cheers!
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