What is the problem when the screen shows a red screen

Sony TVs has an Optical Block issue. If there is an issue with the optical block, then there will be green, blue patches or tint on the TV display. Try resetting the TV to the factory settings and try Power resetting the TV. Turn Off the TV and remove the power plug from the wall outlet for 1 minute and reconnect it and check the operation. If the issue still persists, then TV may require service. You can contact the Customer relations team and check for the available options. Sony had repaired free of cost for such issues. Hence, contact the customer relations.

CRT bias tracking off kilter.

It is rear projection TV that use 3 picture tubes of red-green-blue to show color picture on tv front screen.
Do you see standby red light blinking when TV shuts off after showing blue image for a while?
If red standby light is blinking, please count it how many times it blinks, there would be 3 seconds pause between blinks so count pause to pause and post it here to find out possible solution.
Thanks.

I have sound but my tv screen is black. Sometimes when I turn on the tv I get a picture but after 15 minutes or so the screen goes black again.
It's a 4 year old LCD.

If you take off the front bottom panel of the tv wich is easy. Then you will see 6 tuning knobs at the bottom middle of the tv .the top 6 control contrast for the lights dont mess with those. the bottom 3 are the power to each light.red is bottom left if your screen went blue it makes sense that the red is starting to go but if you turn down the power to it left 1/8 turn it should fix it for awhile .Its easy.

Good Day, msteaz;
Not sure what the light is doing but try to reset the TV by unplugging from the A/C outlet for 5 to 10 minutes. If no fix come back with Model & brand.
Good Luck, big Irish.

Hi,
sounds like a picture tube problem its a problem that probably cant be fixed only by a professional

it helps , if you can tell me how many times the red led blinks , but for that model usually the hi voltage splitter cause that problem,

Sounds like the red color tube is goeing bad you wil hafto call in a tech to conferm it Sony is noted for tubes goeing bad, in the future leave sony alone

I just got a 42" komodo by Sceptre, same problem, except "SCEPTRE" showed on the screen. I was sent a USB key program to insert in the service slot in the back and it reflashes the bios. This is old news for you but maybe new for someone?