SY-41CL lock up current drain

[aurelio]

I had the same behaviour, plugging a non existent ROM image a few weeks ago, twice
the first time was locked with all @ a whole day, without batteries, the second time two.
I was scared and I took it apart several times before to ask Monte for help, thinking to a bad contact problem
He suggested me the step two, it works

It happened again just two times after that and the restoring time was, then, just a whole hour.