This is a cheap 19" with a 1994 date code. It has recently become
unreliable when turning it on. Sometimes, it comes on just fine.
Sometimes, there is no picture, no sound, no HV crackling, and no
power-on thump (from the flyback?), but there is a relay clicking
repetitively at about once per second. It produces the same symptoms
with both the remote control and the power switch. Once it starts
clicking, it can take many attempts to stop it with either the remote
control or the power switch. I would have guessed it was a problem in
part of the power supply. Does anyone have the schematic for this TV,
particularly the power supply and the remote control? Samsung says
they no longer have it available. Is this the right area to be
looking? Are there any other likely common problem areas to check?