I found the article I'd read but on reviewing it there was no real useful thought in it. Blow (air blast) dust out of the switches or ring the manufacturers Agents and ask to speak to one of their technical staff.
Starting and Stopping does not sound like a component fault, it's an intermittant fault, either caused by dust/shavings where you don't want it or more likely something warming up and flexing slightly with heat, breaking the electrical contact, removing the power, cooling down, making contact, working for a while as it heats up, bending ...
...you get the picture.
If the PEC can be removed I'd suggest looking at all the solder joints especially around any transformers or coils. These things buzz/vibrate in use and can cause such effects, I've fixed many a TV just by resoldering the bad joint at one of these.