I have a customers Ambika back on my bench after about 6 months with a strange problem.
All of the voice card LEDs have stopped working. What is odd is this:
the voice cards themselves are working fine
if I connect the AVR programmer to them, the data light comes on and the MIDI activity LED starts working again
if I then disconnect the AVR, the LEDs stay on but the voice card no longer works
if I then turn the Ambika off and on again, the LEDs stop working and the voice card starts working again
This happens with all six 4P voice cards in the unit. I’ve tried re-programming the voice cards which works, and the LEDs start working but as before: working LEDS = not working voice card, not working LEDs = working voice card
Help - it’s insane!