I have a Flat screen TV Proton 42'' only 1 year 1/2 old

I have a proton 42' on the power ligth signal, when I turned on the ligth goes green and then yellow and finally red never , the screen turns blue for a sec then black

if you dont find an answer i would buy the screen for you, i cracked mine

Protron PLTV 4250- wont turn on-
Had the same problem with one here- The 110v end of the power supply board was found damaged, The following items may need to be replaced:
Fuse F1 (soldered in) . 6.5a @250v time delay
Mouser 576- 021506.3HXP – note this style is for a fuse holder instead of solder in- I added a fuse holder on the board
RT4 & RT5 inrush surge suppressors - I used shintron 8d-18 power suppressing thermistors
BD1 bridge rectifier - Mouser 627-D15 XB 60H Shindengen

If you want a little more protection modify the board as follows:

1.replace only RT5 in its original location & move RT4 into the other ac input line in front of the bridge rectifier. (cut trace & drill solder holes)

2. Add: MOV (metal oxide varistor) across ac inputs of bridge rectifier.
Maida mdc-z481-8oul or D69 ZOV 481 RA 105
This arrangment is copied from a samsung power supply.

Be careful when plugging in the I/O box on the outside cover, if any pins are inadvertantly bend loss of picture will result.

I have pics if anyone needs them .