My Sony Trinatron has suddenly displayed a dark screen on all channels. You can see the picture but looks like it's nightime. I've tried ajusting the brightness but no result.

Hello, I'm sorry to yell you that the lcd display (screen) is bad. Usually one side looks close to normal, and the other is dark and the picture drags and looks smeared. The cost to replace the lcd display is more than you can buy another set for, sorry. thanks, Terry

Change input device to some other which you know works for sure. If problem persists, try changing the channel. If you notice same problem, this may need attention by a qualified service technician.

hi sounds like the av sender inside the ps could be getting dodgy, have you tried it on another tv?

I WOULD SAY NO ! THE PICTURE TUBE IS PROBABLY AS MUCH AS THE TV IS WORTH. i had a very nice sony trinatron tv. the picture tube whent on it at about 5 years so I CALLED FOR REPAIR AND THE PICTURE TUBE WAS 2-300 DOLLARS. good-day !

Your CRT's getting old. Plus dust on lenses don't help much. You have to open front frill (below screen) and back of the TV. Clean up lenses using dry paper towels, do not wet.
In front of the TV after grill remove center cover and locate "black box" that have 6 potentiometers on it that looks like plastic adjustment screws for philips #2 screwdriver slots. 3 of them should read "Focus" These you don't touch. Another 3 reads "Screen". Put some still image on your screen (like paused DVD movie frame). Carefully add brightness in all 3 colors trying to avoid horizontal lines appearance. If lines show up, just turn it back a little. Try to keep color balance looking at the picture.
This procedure will brighten up image but further reduce CRT's life.

In case that you posted wrong model here and you have DLP Projection TV - just replace the lamp.

Fuzzy,blury picture in CRT tv tube.Tv in long use not repairable.Tv tube is dying,it junk.

YOU NEED TO GET INTO THE CONSUMER MENU AND ACTIVATE THE AUTO PROGRAMM MODE. I BELIEVE WALMART CARRIES A UNIVERSAL SONY REMOTE WHICH WILL ALLOW YOU INTO THE MENU.
APGONZO
30 YR SERVICER

Press Display / Info button on "TV original remote", such display will disappear.

I have the same issue...help!