HDMI connection off and on

SOURCE: Sony kv35s66: No picture, just sound and red blinking

The most common problem (I have fixed lots) is the Vertical amplifier has developed a loose connection. It probably just needs resoldering. As things expand it makes and looses connection you picture goes in and out. The vertical chip is a large black chip that gets hot, over time it degrades the solder until a connection is damaged. Most newer sets have a protection circuit that senses the lack of height, and shuts down the picture tube to save it. When the picture dropped to a line on older TVs and left that way too long it would burn a line into the face of the picture tube. You then had to have the picture tube replaced along with the vertical amp. it's kinda like a screensaver for your TV.

SOURCE: no picture but has sound

hello .this does sound like bad solder joints .all printed circuit boards do this after a while due to heating and cooling .is not advisable to try to repair yourself .possible electric shock and spiking .will do a lot of damage .take to a shop to have repaired

SOURCE: Sony FD Trinitron WEGA KV-24FS100 24" TV On/Off problems

I think I have the solution for you. I have the same tv and it does the same thing when you turn on the power button on the remote when the tv turns on you hear a click then the red light flashes about 5 to 6 times then the tv comes on. on the remote there should be two buttons on top of the remote one says power and the other one says system hit the power button to turn on the tv when you hear the click and see the red light flashing then hit the system button which will turn off the tv then hit the power button again and it will turn the tv on without the red light flashing it should work