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So I checked the transistor and no legs clipped or anything visibly wrong. Will check to see if it is shorting and if that is the source of the problem.    Meanwhile I’ve been investigating the widget drive I have with the Lisa and have attached an audio recording of the drive when in use. It...

That sounds like a fantastic suggestion! Thank you so much for looking into this. I shall check this in the morning! 

It just won’t event attempt to power on. When the button is pressed there is no life. No audible clicks when the CPU and memory etc are being tested. No high pitch whine for the fly back. It just doesn’t do anything with a known working card cage. 

Thanks again for your help. The motherboard and CPU card have already been treated and cleaned with white vinegar and then IPA to wash off any vinegar left behind. I did that about 4 years ago. So, since the functioning state hasn't changed since then I would like to think the vinegar has...

Thanks for your message. So I swapped everything out and identified something interesting. With a working 2/10 board in the computer it would no longer immediately switch on. That points towards the COP421 chip being to blame on the 2/5. So I tried to start up the 2/10 board but it wouldn’t turn...

Thank you for your advice and I will indeed check out the I/O board although when I did the inspection a few years back it looked fine. The corrosion whilst bad isn’t as bad as some and many of the traces I tested around the COP421 chip are amazingly still working.    Before I do that I want...

I believe it’s an equivalent 1.2A power supply. It’s actually a UK 0.7A power supply. Which as previously mentioned I believe outputs a similar power to the American 1.2A power supply.

Hello everyone, I hope during this period of global uncertainty and crisis that this message finds you well. I have made some interesting progress with the Lisa that may be of interest to some. I am also posting to request some help in the hope of getting it up and running fully.    So...

Hi, thanks for your response!    I opened the drive up and the platter looks fine as does the actuator. It also moves freely as I gently respositioned it to check it hadn’t seized. I also verified that the actuator does move after the brake is released but it basically jiggles backwards and...

So I bought a Lisa and it came with a ProFile and a Widget drive. Both of which seem to not be working anymore. The ProFile didn't spin so I rotated the bearings counterclockwise until the drive started to spin again. However it doesn't seek, I hear the brake release and then nothing. So...

Okay so I plugged the board into a 110V step down transformer and it gurgled and popped. I thought okay the paper capacitors have blown which I should have replaced first anyway. However there was no smoke and no pungent smell. So I opened it up and nothing was wrong. The paper capacitors were...

Amazing thank you!

I have a compact Mac with an analog board which I believe is a US model however the rear casing has 240V written on it. When I got the Mac the fuse had blown most likely because the wrong voltage was pushed through it. Replaced the fuse but I was wondering if there are any distinct differences...

Hi Everyone, I bought a 2/5 ages ago and made progress neutralising the battery corrosion on the motherboard and giving it a good clean. I got the system working and verified components were functional however I got stuck at a I/O error 52. Naturally I assumed this error was to do with the I/O...

Hello everyone,  A quick update to this old post... I have now managed to get this Lisa to boot. Although there are still problems... So I lubricated the floppy disk head assembly and then immediately it started reading some disks. This drive is highly selective when it comes to which floppy...

Yes, however I believe it can do this because the program doesn't take up that much memory. I don't know if the IIGS accesses the expansion card first or the memory on its motherboard. My IIGS can only boot software that doesn't take up too much memory (maybe this is because the program tries to...

The card is fully populated (1MB) and has worked great until today. The internal self test doesn't look at the card as the IIGS is a ROM 1. It comes back saying that the system is good. I have additional diagnostic software that says the card is faulty but it doesn't give any error codes...

Does anyone have any idea how to fix this error. Ive isolated the problem to the memory expansion card inside my IIGS. My IIGS is ROM 1 and won't boot with this card present as it gives this error. I had a look on the web but no-one explains how to fix the issue. I feel from what Ive read online...

The ProFile is seen as it begins to boot but it then fails and lists an error (I can't remeber which one though, I think it was error 38). The ProFile boots perfectly on another Lisa so I dont understand what is going wrong. The memory boards have been tested and work fine in both Lisa's. This...

Yesterday I made some progress with the Lisa and it now powers up and passes all the hardware self-tests. Unfortunately, the Lisa is still having some issues. The power button still doesn't work and neither does the keyboard, but oddly enough the keyboard works in another Lisa. Since the power...