Quote from: TGP39 on February 09, 2021, 01:27:54 AM
Those Belton Bricks are really voltage sensitive with an operating range of 4.5 to 5.5 volts.
If your 5 volt regulator broke down, I'm guessing you had -9v directly to pin 1 on the BTDR-3H.
I think this would cause the Belton Brick to fail.
Maybe others who have experience with this brick could chime in.
Sounds very plausible!