Silver Surfer wrote:

Ran a little experiment on the GE microwave oven that has been vexing me
per
my postings here a few days ago. As you may recall this GE oven will
perform flawlessly with its control panel tilted out at about a 45 degree
angle, but shuts off after only a few seconds with the panel in its normal
position.

Happened to notice that the display began to act weird as the board was
tilted upward to nearly vertical. Got some aluminum foil and cut a piece
that would fit inside a plastic sandwich bad. Carefully draped this
"shield" over the control board on the inside of the cabinet where it
mounts. Tried the oven. Worked perfectly. No more display problems. No
more shutting off early.

What do you think the shield is blocking? My intention is to permanently
mount this shield and resume using the oven.

You probably ought to check for RF leakage, perhaps microwaves are leaking
into the casing of the oven. (and if they are getting into the casing then
this increases the chances that microwaves would be leaking into the room
as well.)

If you don't have a leakage detector, perhaps a local repair shop would test
it for leakage.

Chris