Stupid HDMI issue with new HDTV

I just received my first LCD TV today, a Toshiba 46XV645U. Plugged it into my PC using a DVI-HDMI converter on my EVGA GeForce 260 GTX FTW, while my computer was running no less- instantly recognized it and set it to 1920x1080, no problem.. Well, at least no problem until I went to reboot about 12 hours later.

Reboot, and the computer wouldn't even recognize the TV anymore. I tried forcing detection through the Device manager, and voila, it seemed to work! But then ANOTHER issue-- it's now telling me that the TV failed the HDMI check (and was now listed as non-plug and play) and was now being limited to 1024x768 resolution. For THREE HOURS I fucked around with it, to no avail.. Then suddenly I recalled reading something about somebody having a similar issue months ago, and it being heat related.. So I manually set my GPU fan to 80% and let it cool down to 40C.. EUREKA! I forced it again in Device Manager, it instantly detected it as a Toshiba HDTV and set it to 1080p.

So now, there is one big problem.. What the hell is the problem, exactly, and how am I going to solve this over the long term, without just jacking my video card fan up to 80-90% permanently? Is this just a problem with DVI-HDMI converters?

Just wondering if anybody here has run into a similar issue and solved it somehow, without just blasting the video card fan.

Testing it some more, the GPU going over 50C and doing anything that will cause the PC to do an HDCP handshake (like opening the nVidia control panel) will cause it to lose the TV display.. Turn up the fan and get the GPU temp down to about 40C, it'll restore it.

i didnt know temp actually causes such problems? 50C is well within the acceptable temp isn't it?

Install a new copy of windows on a spare hard drive and see if it still occurs on a vanilla install.
If it does then RMA the gfx card.
If it doesnt, you know there is a cure...

Originally Posted by Nenu

Install a new copy of windows on a spare hard drive and see if it still occurs on a vanilla install.
If it does then RMA the gfx card.
If it doesnt, you know there is a cure...

Wish I had one.. After getting the TV, I'm too broke to get one for a while, too. I'm going to get some compressed air and do a thorough cleaning, though.. Maybe it just got too dang dusty in there?

Originally Posted by CyberMew

i didnt know temp actually causes such problems? 50C is well within the acceptable temp isn't it?

I swear I read something like that months ago, can't find that particular thread at the moment, through.. But, yeah, 50C is usually cooler than my idle speed when the GPU doesn't power down from 666Mhz... And games will make it get as hot as 70C sometimes.. Which makes this issue a real pain in the ass.