Richard, Kiwamu, Dave:

Following Richard's suggestion, Kiwamu powered down the IO Chassis and removed the lid. After about 10 minutes the IO Chassis and then the CPU were powered up. I had removed h1seih45 from the rtsystab file to prevent any models auto starting. After several minutes I verified the Gen Std cards were still visible on the bus. I then started the IOP model. It came up with a minor IRIG-B excursion, which came back down in a few minutes. The Gen Std cards were still with us. I then started the user models, one at a time, with no problems.

Kiwamu and Evan are now untripping the watchdogs and starting isolation. Hopefully this will get us through to tomorrow.

I've put h1seih45 back into rtsystab. Kiwamu noted that the ADC and DAC Gen Std cards have LEDs which are on when powered up, and the DAC cards LEDs go out when the IOP is started. We should see what these LEDs mean.