General Category > Lisa Troubleshooting and Repair

Apple Lisa 2/10 starting up with Profile only; red light stays on

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mactjaap:
Will try to record. In my remembrance it sounded terrible. But maybe my ears are over sensitive if it is about my precious device.

blusnowkitty:

--- Quote from: stepleton on February 14, 2021, 05:44:55 pm ---All right, I tried both of my ProFiles on parallel cards on my 2/10 and on my Lisa 1, and they both behave the way that's described in the original post. The READY light remains on until you power up the Lisa, and then it starts the surface scan.

Two ProFiles, two Lisas, two parallel port cards. (Same cable though.) It could be this is just standard behaviour.

--- End quote ---

I just got a 5MB ProFile last night and I too am seeing this on my 2/5 - if I connect the disk to the built-in parallel port, I can turn the disk on and it will self-test no problem. But if I connect it to either port of my parallel card, the READY light immediately goes solid as long as the Lisa is off. When I turn on my Lisa, then the self-test starts and runs for about 3 seconds and then I assume the Lisa's self-test sends a RESET to the parallel card causing the self-test to instantly stop.

The difference for me seems to be that once the self-test gets interrupted, the ProFile logic seems unable to recover and it leaves the head assembly only a few steps away from the end stop where the light sensor is, and never goes back to the beginning of the disk on its own which means I have to shut the disk off, pull it apart and manually rotate the heads back to the beginning of the disk. My X/ProFile doesn't seem to have this issue, but then again it's a solid state emulator...

compu_85:
You should never, ever have to move the head stepper manually on a Profile*. Also, it's a bad idea to move the heads across the disk while it's stopped! \

I recall seeing something like that on my systems.... I ether wait to turn the disk on until the self test is underway, or hit space and wait for the startup from menu, let the profile finish doing its thing, then continue.

*If the profile has been sitting for a very long time and the grease has gummed up, you can unplug the electronics from the drive and power the spindle motor. Once the drive is up to speed then you can move the heads by hand and get the grease flowing again in the stepper bearings. When done, move the arm to the furthest spot from the LEDs, and power down.

-J

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