JC8080
Well-known member
I have a recapped PSU in my IIsi and it has been working fine since the recap - it's been a few months, but probably only 10 hours of run time. The machine has a NuBus adapter and 8*24 video card. Yesterday while I was using it the machine restarted and then went into a restart loop where it would chime, and about 2 seconds later reset and chime again, and so on. I removed the NuBus adapter and video card and it seemed fine, I thought the video card may have failed, but then after a few minutes of running without the video card the restart loop started again. I replaced the PSU with another recapped unit and everything seems to be working fine. I assume the additional load from the adapter and video card was causing the failure to happen sooner.
I am going to open the bad PSU and take a look around in the next few days, but before I do that I wanted to see if these symptoms sound like any particular failure state people have experienced with the IIsi PSUs. When I did the recap I recapped the daughter board, and I am 99% sure I replaced the two large 220uf caps. I'm guessing there may be a questionable trace I missed that is finally failing, I just thought I would see if anyone has thoughts before I dive in.
I am going to open the bad PSU and take a look around in the next few days, but before I do that I wanted to see if these symptoms sound like any particular failure state people have experienced with the IIsi PSUs. When I did the recap I recapped the daughter board, and I am 99% sure I replaced the two large 220uf caps. I'm guessing there may be a questionable trace I missed that is finally failing, I just thought I would see if anyone has thoughts before I dive in.
