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Flicker problem from HTPC via VGA to Panasonic PT-M1085

 
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digitalsdc



Joined: 29 May 2008
Posts: 2
Location: Utah


PostLink    Posted: Thu May 29, 2008 6:52 am    Post subject: Flicker problem from HTPC via VGA to Panasonic PT-M1085 Reply with quote


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Hello All,

After having read some of the comments on this board, I'm certain that someone can help me with my new HTPC problem. By the way, I just joined this forum, so please forgive any protocol missteps.

For years I have fed various S-Video sources through a DVDO line doubler into my Panasonic PT-M1085 and have had no problems - loved the picture. The DVDO used a standard VGA out (the only option) which connected directly to the VGA port on the projector.

Last week, the DVDO died and I wasn't going back to 480 so I ordered parts and built an NVidia based HTPC. The video board is GeForce 7150/nForce630i and has full capability for custom resolutions. My connection to the projector is straight VGA with nothing else between the HTPC and projector.

Now the problem: I can setup a number of pictures, requiring full convergence etc. but after a few minutes the picture will start to flicker occasionally. Then after about 30 minutes to an hour the flicker will get so bad I can't watch at all and eventually I'll get the "no signal detected" message and I'm done. I'm not sure if this behavior is due to my cabling, but I assumed that VGA carried the sync signals properly since the DVDO line doubler had no problems. Or, is it due to timing and/or resolution?

Any help would be greatly appreciated!

Thanks in advance.

Scott
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David_Web



Joined: 02 May 2007
Posts: 418
Location: Sweden


PostLink    Posted: Thu May 29, 2008 8:09 pm    Post subject: Reply with quote

The graphics card could be overheating. But that would usually show artifacts like snow or block in different color or black things jumping around etc.
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digitalsdc



Joined: 29 May 2008
Posts: 2
Location: Utah


PostLink    Posted: Fri May 30, 2008 5:23 pm    Post subject: Reply with quote

Thanks for your reply David. I had thought too about something overheating, otherwise why would the image be stable at first? However, I don't think it's the graphics card since it's a brand new machine and the graphics card is actually built into the motherboard.

Perhaps I'll try to run a fan directly into the projector and see if keeping it cooler might help.

Are there any other ideas?
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