No picture no sound loud humming sound for a short period when you turn it on than a orange light flashing at bottom where the blue light is when you turn it on.

There is some short circuit at the main circuit board. Seek help of any experienced service technician.

One of the power supply voltages is bad... either a short or the regulator is blown. Follow my instructions for a previous poster:

http://www.fixya.com/support/t10013559-mackie_1604_vlz

Since it sounds like an issue with the Power first try to release flea power.Disconnect the charger,remove battery,press and hold down the power button for 30 seconds.Reconnect the battery and charger.Turn on system and check if it turns on. For further help please check Dell Inspiron 1525 Manual. Also confirm if the light on the charger stays on,when connected to the system.

I have the exact TV and had the exact same problems. It is the light engine with color wheel that needs to be replaced, and they are VERY hard to come by for this model. Our repairman has had our TV for 5 months and still cannot locate a vendor that carries the part. He said according to Toshiba, the part has been discontinued. If you happen to find one, please post. I'll do the same.

replaced the light engine. yhis set is probably not cost affective to fix.

Hi, your color wheel needs to be replaced, the bearings fail causing the grinding noise, the new ones use "air bearings" so they are supposed to last much longer, video-tek

That was my problem.

http://www.fixya.com/support/t293971-37_polaroid_lcd_tv_turn

http://fixyourdlp.com/blog/2007/02/15/resetting-your-samsung-dlp-lamp-hour-meter-counter/

My LG TV
switch on no picture but short period of sound then nothing

i also have the same problem with the flashing green light for a while then a different red light starts blinking on and off around 5 times....and i replaced my burnt bulb with a new one...still no picture.