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I'm aware. I just wanted to see the result on the screen. When I did take this apart originally, the two left pins were touching. Pin one was bent over onto pin two - similar to a jumper being installed. Maybe a previous owner had bent the pin to touch. This isn't a Mac I have previously used...

I had to wait until today when I received a different set of 30 pin RAM chips. These are 30 pin 9 chip Parity 70ns FMP SIMMs stated to work with MacSE and Plus. I removed and cleaned the two ROM chips and the and used Deoxit on the sockets and the RAM sockets. I bought four 1mb RAM chips (My...

I have a problematic Mac SE FDHD with lines going across the screen. I recently recapped the analog board and the (Sony) power supply. I also tried a second analog board and a (Apple/Hitachi) power supply and had the same screens. I am getting proper voltages on the power supplies and I have...

I just recently worked on my 512k and had an issue with the eject mechanism being stuck. I cleaned it up and applied new lithium grease, but it still wouldn't move. I watched this short YouTube video over and over just to watch how the disk is ejected. I found my issue and placed a few drops of...

Nice work. I have two Maxell battery bombed Mac IIfx boards. I've been able to repair the startup/shutdown circuit. I also repaired many of the broken traces, but weird thing is when BOTH are powered on, I instantly get the death chime and no video. It's been frustrating. I haven't looked at...

I definitely agree with soldering one side first technique. Also for some odd reason the traces around C4 are weak. I've had two boards have the pad come up on me at that capacitor. No where else. Luckily it's an easy repair, but just odd.

Here's the matching inserts https://www.amazon.com/Products-Inc-Fitting-Injection-Molding/dp/B07NBQ6NHL/ref=sr_1_10?crid=2DY83PSGBMI87&keywords=m2.5+inserts&qid=1681346152&s=industrial&sprefix=m2.5+inserts%2Cindustrial%2C116&sr=1-10

I recently purchased some M2.5 x 5mm screws on Amazon for mounting BlueSCSI devices to a 3D mount. I tried the screw on the PowerBook screen back case. It fit. Here's the Amazon link for the screws I purchased...

Still no luck. I changed two of the Resistor Packs RP5 and RP6 and still no boot. I'm placing this board on the shelf to take a break.

I think I am going to check the IC RP5 which is near the two PRAM batteries. I did have some corrosion near there from the batteries. RP IC chips lead to the ROM socket according to the bomarc Mac II schematic. (image is of another Mac IIx board of mine).

There appears to be an issue with my ROM. I checked voltages on my good working Mac IIx and the non booting one. I had steady voltages on the working one and many of the ROM pins on the non working unit were jumping. Not too much, just a couple of tenths of volts - like 1.8v to 2.2v. They just...

Yes. I have attached an external speaker and do not get a chime at boot. I do get a crackling sound as I plug in the speaker, so there is sound being produced. When I also check the sound chips for voltage, I get the similar crackling sound from the internal speaker when I touch one of the pins...

I have been working on a Mac IIx motherboard that will not boot. I have repaired the startup/ shutdown circuit and it will turn on by pressing the power button. However, I do not get a boot chime nor video. There was slight battery corrosion and slight capacitor corrosion near C9. Nothing major...

I have a similar issue that is mentioned in the PowerBook 140 Display Blue posted by Powerbook27364 recently. I've successfully recapped several PB screens, but this one is bugging me. At first I got a full display but the top half was broken and dithered. I went back cleaned everything...

My first soldering station was the Weller WE1010NA. It's a nice entry level station. I've purchased a much better Weller unit, but I still have it handy as a secondary station...

True or actually very were old. I searched Digikey and Mouser for that value of capacitor. Mouser has them now. They don't match the small through hole currently on the board. All of them are tall axial versions, which is why I had to bend them into place. The ones I purchased on eBay were from...

There are only two caps that need to be replaced on the inverter board. They are 8.2uf 80v. They are kind of hard to find at that size and measurement. I found some on eBay that were much taller. I ended up bending them to fit. It worked out okay. Clean the contrast and brightness switches as well.

Pretty cool. I have a 512k. Nice to have some documentation.

There are a couple of 3D print files of battery cases that could work if you have issues with your original case. I haven't printed any yet, but plan on rebuilding a couple of batteries soon and it's nice to know there is an option just in case. https://www.thingiverse.com/thing:5231825

The This Does Not Compute video was very helpful. I printed up the same files to repair my PB145b and used the Loctite glue. You need to make sure the case is sanded down flat because the glue works quickly. The pieces will need to to be slightly trimmed to fit or sand the area to fit. These...