The 'Red button Relay' energizes when the Red button is pressed.
It is located at A-10. It stays on because the relay sw. B( at D-10) locks ON, which enables the coil
to latch ON.
*** See manual page 18.
**** If your relay is ON when you Power On..........the above relay switch B may be making
contact. It s/b 'Normally OPEN' not Closed or
Red Button sw.#1 ( at C-10) may be Closed. Both contacts s/b N/O.

Try this...........
http://bingo.cdyn.com/techno/commonproblems/locks/rails.html

NO...........

I had the same problem with one of my Bingos; I don't think it was my 'ShowTime'
though. I think I was able to get it from the Backcase though...... don't remember!
You need to get access from the Front; its much easier when you can lower the Backcase
and work on it that way. You may have to work on that 'Magic Squares' assy. You will probably find out that
assy. can be a royal 'PITA"....... be careful with that assy. , it has 115volts on it.
"ShowTime' is a great Bingo............ one of my favorites!