Television and Home Theater

HI

I have a philips 23pf9956/79 television/monitor the problem being that when you switch it on it comes up with a 19" screen it should come to a 23" and after 5 minutes center top of screen it starts to quiver then 1 minute later a black line 2" wide from top to bottom of screen then after a few minutes black bar goes away then lines running down from top of screen  to the botton of screen.

when you switch off then waite 5 minutes then switch on and same problem again can sombody please tell me what could be the problem

The other day I had to replace a light switch in my family room.  I turned off the power to room to replace the switch.  After turning the power back on, the timer light on our Mitsubishi WS 55 511 keeps flashing a green light.  I try to power on the TV and it doesn't power up and continues to blink the green light.  I have been reading about many who had a similar problem and fixed it by replacing the capicitors on the DM board.  Does anyone have the instructions on how to do this and what capacitors I would need to replace the existing ones?  I appreciate you

When I turn it on only Audio works but no picture then it automaticaly shuts down after a couple of seconds. I counted how many times the red light blinks next to "Stand By/Timer" it blinked "SIX" tiimes

I have no idea what to do can someone please help me :(