Dead TV (TEAC CTM685)

I pick up this tv when somebody else warning me it’s broken, since repairing is not too bad for me;)

However, this is just the beginning of my nightmare.

This tv is easy to be identified as psu failure since no picture, no sound, just dead. When I open the shell, a capacitor in psu was clearly exploded. However, I can not confirm the reason of breaking. After researching on the circuits for couples’ weeks (no schematics available), there should be the high esr of other capacitor in psu oscillator cause this problem. After replacing all these capacitors, wow, the psu HT and line rail are all ok again (cheers!). When I push the power switch in (and hold on!!!), the screen display noises as well as the speaker, all are fine. But when I release the power switch, the set just turn to standby automatically. It seems something wrong about the cpu or some protection are triggered.

Hope to be solved later.