464 engine turns on automatically problem

[Yohann]

Hello everybody !

I have a small problem with my 464.

When I turn on the tascam, the engine automatically starts running !

Unable to press start, stop, or other.
When I touch the pitch or speed setting, I can see the variations, but the only way to stop the reading. It is to cut the power to the tascam.

I disassembled it to verify that a wire had no problem, but everything looked intact.

Any ideas ??

Thanks for reading !