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For those wondering, I found the issue - it was the adapter. The PB 100 boots great from my PB 150's "low power" adapter. Guess one of the ICs in my recapped adapter went bad - this PB has an additional fuse fix from the factory so it could be drawing more power.

Nice work! Do you mind pointing where DZ6 is? (Sorry, I can’t seem to see it in the pic) I have a 210 with the exact same gray screen issue right now...

I sold that 575 to another MLA member actually! This is another one that I never had the motherboard with. I kept my own LC 575 :)

Yay, it's looking great!! Happy that it went to a great home  :smiley:

Made a major purchase that I wanted ever since I first heard about the 550c from the Cult of Mac book years ago - I picked up a Powerbook 550c with the box and manuals for a grayscale 520 for $350 shipped from Japan. It had some minor cosmetic damage to the screen from a leaking PRAM battery...

So I was getting ready to set up my SCSI2SD with my 540c, only to realize that the 540c's HD cable is keyed in a certain way so that nothing can go in pin 17 and the SCSI2SD is not (it doesn't have the missing pin 17 that the CF PowerMonster and other SCSI drives have) For those using SCSI2SDs...

It really is a cool upgrade! I'd love to get the CPU/FPU working, I hope I just missed an additional jumper setting or something of the like.

Thank you @PB145B! The person who I got it from picked it up several years ago from an estate sale local to me. It can be upgraded to 4MB indeed - I think theoretically you could go further if you wanted more RAM for a RAM disk!  It also has a custom drive bracket that holds the FDD/HDD and an...

Hi all, I picked up a 512k with the MacMemory Turbo Max upgrade (16 MHz 68000 + internal/external scsi + ram slots + FPU). After some fiddling with it I got it working with the exception of the CPU/FPU - it just detects the original CPU/no FPU. Does anybody know if there's an additional driver...

Part 2 of the same conquest: 512k with internal SCSI HD/external SCSI port/upgraded RAM/ROMs (not 100% working atm) Performa 575 (no MB) Performa 575 Some internal/external SCSI HDs 12" RGB monitor - very yellowed and with cut off cable - hope to resplice a new cable soon Paid $150 for...

I got a fixer CCII as a bday gift from my sister from Buyee - unfortunately the CRT got wrecked in shipping.  Thankfully, someone who I purchased my Portrait monitor from hooked me up with a good deal. For $100 I picked up the following: CC - bad analog board - was recapped and still has...

I have since acquired this particular Classic II and this isn't a issue with the AB, it's an issue with the logic as the screen pictured happens with my working analog boards. I'm working on figuring out the issue now.

Personally, I wouldn't worry too much - I've never personally broken a plastic SIMM slot. I've always bent them to the bare minimum that they need to be bent in order to release the SIMM and they've always been intact after. 

Also on another note... I bought a "dead" PB Duo 270c for $25 shipped BIN on eBay. Tried it with my yoyo adapter and it booted up ;) Another nice bonus was in store for me as well: It only had a 8MB module installed, but not complaining at all considering I got a working 270c and a 1.2gb...

I also am having the same issue with my backup SE/30 board (no sound whatsoever except a slight crackle through the headphone port at boot). Mine had several missing pads when I got it but I think I’ve patched all of the obviously broken traces.

That's awesome! I'm hoping that I just didn't clean the EGRET enough... but I'll report back. 

Picked up a bunch of things as of lately: @rushfan82 very kindly gifted me a Classic II and a rough B&W G3 for free - thank you so much and it was great meeting you! The Classic needs a lot of work but I'll give it my best shot. Also picked up some more items through Buyee: Macintosh...

Hey, sounds good. I will re-remove/clean again. But I did originally clean both the logic board and chip itself on both sides, as well as add fresh solder on both legs. If the small chip you are talking about is U11, I removed/cleaned that. Voltages seemed to be very slightly under but I'll...

I was thinking I may have introduced additional contamination to the EGRET (thereby causing the weird static noise-I used chipquik and flux to remove it and hot air to reattach) - if so what would be the best way to clean it? Would immersing + scrubbing with IPA/DI water work?