Hi,
I got an SONY KV-M1421D Trinitron color TV. It has a strange fault. If I turn on the TV it works great. Everything works perfect. But after about 1 hour the picture gets darker and the sound gets weaker. I can adjust it for a few minutes. But its get darker and darker.
Can anybody point me in the right direction for reparing my TV. I have got electronic experiance but I can't find the fault.
Greetings Richard