HTPC HDMI Handshake Issue?

I have a persistent issue that just doesn't want to get solved. First a little background:

I've had an HTPC attached to a Sony STR-DN1000 AVR connected to an old Samsung Plasma Display for a couple years with no troubles at all. I decided to upgrade last year to a much newer and nicer Samsung LED LCD UN55H6203AF. At first there wasn't much of an issue, but for the past couple months I have been having complete drop outs of the signal, the picture would be fine and then all of a sudden the TV shows a no signal display and the screen goes black. The only way to bring it back is to restart the computer. Sometimes it happens multipe times in a row, sometimes i can watch a couple shows at night (either WMC, netflix, or VLC player) and there is no trouble at all. I got frustrated so I purchased at ConnectPro TMDS-EDID box and that doesn't seem to fix any sort of handshake issue at all (if that is the issue). They weren't helpful with their customer support and just said to ask on forums to see if anybody knows a fix.. So.. anybody know of what i could do to fix? here are the specs below



Mainboard:
MSI FM2-A55M-E33
- Radeon HD 7660d

TV:
Samsung UN55H6203AF

AVR:
Sony STR-DN1000

Also running:
ConnectPRO TMDS-EDID


Thanks for your help!