I just skimmed through your post, but I have a couple of thoughts
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Where did you get your PM3 from?
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what size is it?
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512kB or the 256kB.
If it is 256kB, you will need to clean out some unnecessary files.
Let me know if it is, I can direct you to a guide. -
Have you tried changing the USB cable?
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Is it plugged into the short end?
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What guide did you use to install?
I tend to not fuck around chasing my tail, I prefer to delete and a clean install.
I have installed now on a few computers, all but one (Linux) was windows.
My first time was using an online guide it worked fine.
- Then I followed Amals guide here
- After that, the next time I used Amals guide again, but documented as I went, to make a (hopefully easier to follow, just the necessary bare minimum to get a successful install)
I shared that here
https://forum.dangerousthings.com/t/handy-dandy-tips-and-tricks/13041/14?u=pilgrimsmaster
AND then I did this one, and managed to thin it out even more, but this is probably better as a refresher than an actual “guide”
- Also, it could be a Button pressing error, which is mentioned in the guides, but also here
Hopefully amongst that lot, lies your answer / solution
Good Luck