Racal 1992 counter fails initialization

[Chris]

This counter comes up with all the LEDs lit up and no
buttons are responsive.

Another one of these appears to have
an initial display showing firmware version.

So, I think this broken one is not initializing properly.

Any ideas?

 

[Chris]

Figured it out.
There was a small surface mount resistor on the bottom of the
main board, on the power switch side, hanging between C125 and
Q29. It was completely open and looked physically cracked.

According to the BAMA copy of the manual, it has something to
do with resetting the microprocessor.

When that was replaced it booted up fine and appears to work.


On Feb 4, 3:22 pm, Chris <ch...@yipyap.com> wrote:

This counter comes up with all the LEDs lit up and no
buttons are responsive.

Another one of these appears to have
an initial display showing firmware version.

So, I think this broken one is not initializing properly.

Any ideas?