Sony trinitron kvm2101d

Eventually im having trouble with my sony television, when I switch it on it initialy switches back

Until now if you need to ask what's wrong than no-1 can say you how to repair it.

Check for obnvious things, such as connections, aerial, wether it affects all channels,etc. If it is connected through another piece of equipment such as a video recorder or satellite/cable reciever, try connecting the TV directly to the aerial to eliminate them as the source of the symptoms.

Failing wich, get a repair estimate from a qualified technician.

I found this on the 'net and will try on my set tonite:
Sony has a default override that disables the video whenever something is not 100%, that's why the video shuts down; acting like the Picture tube is bad. I was told to look for the G2 adjustment and turn it. He said it was a black plastic screw adjustment located on the picture tube yoke or on the high voltage?? That can be found by following the big red lead that goes from the Tube, to it. I found it on mine and there are 2 screws, the top one (if you look closely) says focus the other one (the one you want) says screen. As the set was on (audio fine as usual but no video) I just turned that stupid screw a hair clockwise and waa laa Picture on! I played with it to see what it does and if I turned it full counterclockwise the screen went black, as I slowly nudged it clockwise I got a line at the top off the screen, then a good picture, then all the way up, a sort of bluish picture with faint lines. I backed off the screw and turned it to where the picture came on and then just a hair to keep it on, but not so far to get the lines and left it there. Another thing this wonderful TV tech told me was .Sony has a chip that automatically sets the red, blue, and green every single time the set is turned on. I'm glad I remembered that because there was lower right green cast, and an upper right blue cast after messing with this screw. I shut the set off and turned it back on and that was corrected : ) I turned the set on this morning and it was perfect and stayed on unlike the last two weeks of banging, plugging and unplugging, and shutting off and on numerous times to get it to stay on for the night. It seems that all my set needed was that tiny turn of that screw that fixed my!

Hi mam646, welcome to the forum. I hope you will like it here

Thank you for that information. Weird how big problems can sometimes be solved by small changing some small details