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It does run so I wonder if that is part of the charging circuit. I wish I had schematics so I can figure out the values of the three big resistors that were there.

Got a couple of board photos. I am trying to reassemble after cleaning. It's not easy with this one. The plastic tab came odd the video cable.

From the way it reads, it sounds like it, although the letters D/LT386SX Plus don't appear anywhere on it. I will post some photos and what information I find soon after I get it cleaned up. It does function but has some burned out resistors on one side of the power supply. I assume that was...

I just acquired one of these in operational condition. Does anyone have any information about it? I tried googling it, but all I get is sales history sites. Also, mine is missing the battery door on the top back and the modem door on the left rear. If anyone has a line on these, I would...

Awesome. I plan on making this the best PS/1 2011 I can with this, Gotek, XT to IDE, RAM and maybe a bit of an overclock.

Will that fit without the case extension?

I found some info here, looking more into it: https://forum.vcfed.org/index.php?threads/ps-1-2011-acu-project.80370/

Has anyone reverse engineered the expansion connector in this PC? I did check and it's the same pin pitch as a PCI connector, minus about four pins. I was wondering if anyone has already tried to make an ISA adapter to fit like one 8 bit card in this machine.

Update: So far, I have checked voltages at the floppy port and all are within spec. I have checked the clock at the CPU and I am getting one. I have checked the address and data busses and there appears to be activity. I reflowed the entire analog board. I have NOT noted any startup chime. I do...

I suspect it wouldn't be too difficult to interface, but to keep the external working as a drive 2, that will need research.

I have acquired a 520st recently and I am wondering if an internal gotek would be possible? I was thinking about adding an interposer to the floppy controller IC to give an internal floppy connector, then remove the serial connector and bypass caps and make a custom bracket for the Gotek and...

I recently recapped an SE analog board and power supply after the video on it failed. I checked the voltages at the logic board and all look good. What else do I need to check? I also built an SE Reloaded board with all new caps and resistors and have just tried another CPU in it but it...

I am trying to get my SE up and running from being battery bombed. I actually went the way of buying the new PCB and I rebuilt it. While I was testing before rebuilding the board, I lost video. I recapped the power supply and analog board with no changes. I reflowed all the solder joints on...

I bought an SE that was battery bombed so I worked and cleaned the board up and repaired what bad traces I found. I powered the Mac up and it had garbage on the screen in the form of faint checkers, but you could see a sad mac with some garbled error under it. I posted on the Low End Mac page...

I wonder if it would be possible to modify a RaSCSI to operate as an IDE/ATAPI drive. Having that with a display and a jog wheel for easy image selection. Could possibly design companion software so you could have it go to the next image for multi disc software with hot keys. The only quirk...