No to the line conditioner, nor an extension cord did not do anything, but I did try it. Another thread did school me on how that was not going to work.
But what I did find is that VGA2HDMI product I bought is extremely touchy. I found if you get it near other things, this will get the TV flashing, more and more.
It operates by 1) USB out - which I plugged into the TVs USB power 5watt. 2) I had a short 1.5ft HDMI cable. - 3) I had my 75ft run VGA cable
For short periods of time, it would run ok. I tried moving the cable contraption around. I had it working, and I thought it was good, and I went to bed. I woke up in the morning... and guess what--- Flashing.
So on to trying more things:
So I above I tried sheild the cable above with tape, but that didn't work. The next thing I did was:
1) I found a longer HDMI cable - 10ft. - 2) I plugged the USB power into the wall via a USB adapter I had laying around that almost matches the power requirements exactly (mentioned in a earlier thread).
--- Now I can get the whole contraption away from any power sources... and now no flashes.
Brilliant picture!! Crisp! woohoo! Edit: if anybody does buy the VGA2HDMI product - make sure you get the version with the USB power. I've seen versions of the same product that don't come with that.)
Edit: here is the actual link to the product I bought... http://www.ebay.com/itm/261119834299?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649