Thanks Dan.
Good idea. I'm an experienced electronics hobbyist and have the proper
soldering tools and I should have known that... I will disassemble the
board where the power switch together with the microcontroller is
located and inspect it. Maybe there is a cold solder joint that worked
for the first 3 years and is now getting worse by the permanent
mechanical
stress of pushing the power switch.
If anyone else has experienced the same error, please post your
solution.

Bernhard (backs*mailandnews.com)

Dan wrote:

The symptom you are describing is indicative of cold solder joints. If you
have proper soldering tools, and experience,you should be able to complete
the repair, if not, i'd advise that you take you take your receiver to a
repair shop, where you can at least get an estimate. Which most shops offer
for free.

Dan
"Bernhard" wrote in message
...
My Yamaha RX-V795 receiver shows a strange behaviour.
After switching the device on, it shuts down immediately
or after some seconds or after a longer period of time,
sometimes after 1 or 2 hours.

This often happens when I inadvertently bump against the
rack on which the receiver is located - but it also happens
when absolutely no mechanical vibrations are present.

I already opened the case and tried to force a shutdown by
knocking on all boards, connectors, switches and everything
inside. I could not find any connection with my actions and
the intermittend shutdowns.

Before I buy the service manual and disassemble the unit,
I would like to ask, if anyone else had this error and could
help me.

Thank you very much.

Bernhard (backs*mailandnews.com)