Have a toshiba 40RV525R LCD tv, sometimes when you turn on get perfect picture/sound, turn it off then on then no picture/sound but have green light & toshiba lit up.

Sounds like main board fault. Contact any service technician to confirm. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/

I have a Toshiba 52HM95 the red light and the green light keep coming on but I get no picture but I can hear the sound very good what could it be please help

Do you have sound? What you are describing sounds like a fault in the back light circuit

Check its back light inverter board for the fault. This is a skilled work. Contact any experienced service technician to get this set repaired.

I have the same problem with the black screen and no sound. Also the green light turns on and off while hitting the power button. Although if i turn it on then off multiple times it eventually turns on and works perfect... Could you do the same thing before it finally quit all together or did yours just happen over night?
-Kenny

did you change it

Hi Gordon,

Did you fix this problem? I have exactly the same model with exactly the same problem. I've checked the capacitors on the PSU board (as suggested in one of the responses above) and they all seem OK. If you fixed the problem, I'ld really like to know the solution. Many thanks.

Regards,
Harry.

Looks like video problem. Contact authorized service center.

Sorry, I donʻt have solution, but I do have this exact same problem, same model of TV! Iʻm wondering if youʻve had it fixed yet and if so, how did you do it?

I had the same exact problem.
I removed the bulb and cleaned it. There is a small screen at the top of the bulb and it was covered with dust. Once it was cleaned I replaced the bulb and it solved the problem.
Thanks to those who posted the solutions