As a service tech, intermittents are almost as nice a problem as a root
canal procedure.
There are service procedures that the techs can perform when they return
short of transferring the set to their shop. It may be prudent to have the
set in operation for an extended period of time so it is acting up when they
arrive.
"RichK" wrote in message
. ..

"Art" wrote in message

Video tape the sypmtom with a video camera and play it back for the tech.

Done that. Seems to be heat related, as it happens when set warms up.

The parts and service for the visit were over $1000. Lucky there is an
extended warranty.

RichK