I picked up the unit today after a thirty day waiting period(they're required to do this with used equipment to insure it's not stolen). I've got three days to check it out for any problems. All ins/outs, channels, levels, leds, pots seem to be working fine. Recording and playback heads look fine. I'm going to leave it powered up and be doing lots of recording and playback for the next three days.
Any other important tests I should run?
Thanks for any suggestions.