I acually have two televisions that are having this problem. One(panasonic) sometimes wont shut off until I have clicked the on/off button many times ( both on the tv and the remote).
My other Television (magnavox) just started this problem but it won't shut off at all, I have to unplug the tv every time not to turn off. But when I plug it back in I can turn it on either by remote or the on/off on the set. What part do I need to fix.

Michael Peak, November 2004

The on/off switch is a complete interuption to the mains input to the TV. If the TV doesn't switch off within a few seconds of using it, then there must either be a faulty on/off switch or the button you are pressing is not hitting the shaft of the switch to depress it fully.

Note: If you switch the TV to standby before pressing the on/off switch, then when you switch it back on at the switch, you also have to switch it back out of standby too.

There is a problem with one of the recent Panasonic models (PL range, I believe), where it may not switch out off standby every time. There is a modification to these sets to cure that problem.

Cobweb, November 2004