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Hi all, I used ADTPro on my Apple III to transfer a complete image of a Lisa ProFile drive to my modern Mac. I'd like to use this drive image as a boot device in LisaEm, but the program doesn't seem to recognize it as a valid image. Has anyone successfully done what I'm trying to do here, or...

Do your PSU output voltages look to be within spec?

You're braver than I am - I'd be too nervous to poke around the high voltages in the CRT cavity when the system is running.  :lisa2: I don't have a video board handy right now, but the large square plastic connector near the video board card edge has given me a lot of trouble in the past in...

Have the original capacitors on the video board been replaced? I had the horizontal line issue on my 2/5 until I bit the bullet and replaced all electrolytics on the video board. Even if it's not the entire problem, it's a good thing to do preventatively to keep things working reliably...

There's some COPS-relevant documentation in the Lisa Hardware Reference Manual, sections 6.6.2 - 6.6.3: http://www.bitsavers.org/pdf/apple/lisa/hardware/Lisa_Hardware_Manual_Sep82.pdf

You may find it useful to look at the boot ROM source on page 70: https://www.applefritter.com/content/lisa-boot-rom-listing

Some of us have had the same issue after recapping and were discussing it on another thread - check this post out:

I've encountered the "missing keyboard" error plenty of times (error beeps "high, high, low"), but I've never encountered the missing mouse error. What pattern of beeps does the Lisa make when showing that message?

Based on the schematics and help from an electrical engineer (thanks, ZFM), here's our analysis of what's going on: On the Lisa video board, the horizontal phase potentiometer controls the amount of feedback to the input of the circuit that amplifies the horizontal drive pulse. A +5V line is...

Hey blusnowkitty - I may have found a solution to our shared problem... can you please post the link/datasheet of the capacitors you ordered to replace C14, 15, 18, 19, 20, and 21? (16V 2200uf)

This should be the schematic for your I/O board: http://bitsavers.trailing-edge.com/pdf/apple/lisa/hardware/050-4008-H_IO.pdf

blusnowkitty, here's a link to a video of my Lisa's screen: https://www.dropbox.com/s/n29hdnv4xckbivr/LisaScreen.mp4?dl=0 For reference, here are the capacitors I ordered: Lisa 1.2A PSU x1 250V 0.1uf X https://www.mouser.com/ProductDetail/539-158X104K x1 250V 0.22uf...

That does look very similar to what I'm seeing! I'll try to take a video later and post it for comparison. I've found this to be normal for the 1.2A PSU regardless of load. I'm running my machine right now with no extra loads (no Sony drive, internal hard drive, or expansion cards), and I hear...

I might invest in one of those meters! It does seem pretty useful for this sort of "debugging"  :lisa2: I performed the same re-cap job on two PSUs (with trusted-brand capacitors from the same Mouser order), and they both have developed this same problem, which leads me to believe that...

I just used some rubbing alcohol to clean the board after each old component was taken off and after each new component was added.

Thanks for your reply and the link, sunder! I've cleaned the edge connector and made sure the Lisa is plugged into a power strip with no improvement.  This power supply definitely didn't have this problem before I replaced the capacitors. Also, I have another 1.2A PSU that I haven't recapped -...

Since I recapped my Lisa power supply (1.2 amp), I've noticed that vertical lines on the screen that should be sharp are "squiggly" (like a sine wave, almost), and moving up and down seemingly at random. This interference will change when I turn on a ProFile drive nearby, or even when I turn on...

Hi Max, I have an idea about your power supply with the non-functioning interlocks. If the schematics for the UK 0.7A and the US 1.2A PSUs are the same, I would recommend checking transistor Q5 for damage (shown here in the bottom left): ...

If you unplug everything in the floppy card cage (lite adapter, drives, etc.), you should be able to swap motherboard assemblies between the 2/5 and the 2/10 with no issue.

Hi Max, Are you using the 1.2A or the 1.8A PSU? I find it very odd that the back interlock switch was not working as expected, since it's internal to the power supply.