I'm working on a Philips 60P8342 (P916 chassis) that shuts down about
3 to 5 seconds after turn on. I have the electronic version of the
service manual and so far everything I've checked looks good. The low
voltage power supply is regulating correctly and it has horizontal and
vertical deflection. I tried pulling the convergence plugs in case a
convergence IC was shorted. I also pulled the CRT sockets in case one
of the CRTs was shorted. It has high voltage until shutdown.

The manual I have isn't very helpful in determining the cause of
shutdown. Does anyone with experience on this chassis have any
suggestions? At this point I would be happy to take the risk of
disabling the shutdown circuit to see what happens. If it can't be
repaired inexpensively and quickly it will be scrapped anyway.
Andy Cuffe