What is wrong with my 32" Sony Trinitron? Screen goes black?

another thing could be the tube is on its way out. the AKB circuit is kicking in - very common on sonys. But do get it looked at by a tech, this sort of thing cannot be diagnosed accurately with internet guesswork.

romko
January 2007

Sounds like a tuner related problem. I have repaired several Sony's (amongst others!) with bad solder joints on the tuner.

My fix has been to de-solder the tuner from the mainboard, then remove the shields and inspect for cracked solder joints. This issue has been quite common on tube-type TV's from the 90's; poor soldering quality from the tuner vendors.

If you have electronic experience, this is a simple fix, but not for novices - televisions can maintain a lethal charge in the tube even when unplugged.

Feel free to contact me through electricalrepairlinks.com if you need any additional information.

Tim
January 2007

It sounds to me like a badly soldered joint , I had same problem on an older tv... it would be no pic until things warmed up and expanded enough to make the joint connect.
I found that when the pic went blank if I gave a sharp thump on the cabinet it would bring the pic back.

Pete.
January 2007