"Arfa Daily" wrote in message ...

I've had one or two failed micros over the years, but compared to faulty
switches, the relative proportion is vanishingly small.

As soon as I find the service manual (which I will be looking for this
morning), I will let you guys know. (I'm sure you're waiting with bated
breath.)

Practical servicing question, Arfa... If I'm soldering in a CMOS-based device
that's battery-operated, would it make sense to leave the batteries in, on the
(likely faulty) assumption they would supply a low-impedance path for errant
voltages?

Of course not! I shouldn't have written that! I'm making a fool of myself!