Both plus and minus 12V? You do need both.
I didn't check for -12V. I'll do that before I go to the effort of pulling
the chip and replacing it.
If there's no change in the LED indicator, and
the input that drives it is
changing, then yeah, it's probably toast.
Thanks!
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.