Hi I have the 42 inch Sony Bravia in my bedroom.The picture upstairs in the bedroom is too big for the tv if that makes sense.

Check the LVDS connection cable for loose fittings at it sockets.
http://electronicshelponline.blogspot.com/

Yes. You can. Even though the number of prongs are different, there will be only 2 conductors connects the TV circuit.

usually the price of the screen replacement almost always out weighs the price of a new one.
unless you are a do it yourself kind of person.

The panel is defective.

is there a problem with the cable from sky to your tv test using another tv

The cheapest I have found is Videosecu Dual Arm TV Wall Mount Bracket for Sony Bravia 32 37 40 42 46 50... on amazon. I hope this was helpful. regards

Since the TV is still receiving power, the problem is going to be with the TV's mainboard.  After you unplugged the TV and plugged it back in, you said the power light went out again, so I assume the standby light wasn't flashing again?  The flashing standby light is indicating an error code so my suggestion is to contact Sony for service options regardless if there is a warranty or not because service is the only solution to this situation.  Don't forget to provide them the error code or 4 flashes repeating.

It appears that the problem of electromagnetic waves. Somewhere there are a source of radiation that the real problems ps3 and television

how old is this tv?

hi there, it may need some fine tune for the sony kv-27fs12 to be connected directly to cable jack wall. do some test. ty