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I've removed all the "new" caps to inspect the traces under a magnifying glass. I checked almost all of them for continuity and found no broken traces. I was a bit sloppy when removing old caps, so I scratched the board one or two times near the caps, but even these nearby traces are intact. I...

It is an Enhanced Audio revision Logic board. I checked the traces around the caps and found no breaks. I also ran a diode meter through the ceramic caps at the bottom, and found two that are shorted to ground. These are C18 and C40. They are both connected to the ground plane at the one side. I...

I just acquired a mint condition Classic II. It was described that it shows only checkerboard pattern. When I got it, it powered on and it showed checkerboard without chime. The HD also starts. Then I recapped it, but now the screen remains blank, also without chime. The logic board was in...

Ok, I replaced the capacitors (100uF 250V) and diodes (used the 1N4007s).I used the brake fluid on the case and the old paint is starting to peel off easily :) After that, I tested it. It chimed, but the screen remained dark. Also the cathode heater in the CRT was glowing quite strong. Next...

I got a 512k from a friend. He got it from someone, and that one completely took it apart. Also the case is painted with some ugly beige Apple Snow White wannabe color, that needs removing. Brake fluid prehaps? The logic board is modded, there is a MagicSCSI card installed. Analog board has...

I'd like to know where to get a TiBook adjustment kit... I have two TiBooks both with quite stiff hinges

I changed the SCSI chip, but it still doesn't work. So I guess I would need a new motherboard. However, this PB 230 also has a dead keyboard, a LCD with delamination problems and a broken LCD latch. So I guess it's more or less just for parts...

Hmm, if you smashed the CRT neck and let the vacuum out, you're really out of luck on that SE/30 :( . You would need a new tube, but you'll also need to replace it and then do an adjustment. I also been there, done that. You probably left the CRT board on? I did that, so it was really easy to...

You are bang on. I get a chime. The HDD won't spin. I do have a dead LC III board (battery leakage). Perhaps are chips interchangeable with Duo?

Grey screen. The one that usually shows pointer and the happy mac/insert disk icon. Sadly, I don't get either of these.

I drew the line too soon. It actually doesn't work correctly. It will chime, but I only get a white screen with no pointer (even in the Duo Dock, so it isn't the LCD cable), and the hard drive won't spin. The PRAM battery is missing, but I doubt that this will cause these symptoms. So I am out...

Y1 something? Sorry, but you have a bad case of a battery leakage. You definitely should clean this board AASP and then look for damaged components. Also the picture is too blurred to be any good. If the board is not too damaged, you can then proceed with recap. Clean the board first with soapy...

Yup, I also believe that the motor control circuitry might be acting up. Perhaps is there someone on the forum that knows something about these three phase motor controllers, as they were used on pretty much every floppy drive. It might be a dried-up capacitor on the PCB, however, I checked them...

I swapped the drives, but it does the same if connected to the internal port. I played with the drive some more and found out that the motor will start by its own if it is rotated in some positions. I took some voltage measurements that confirmed this, as sometimes there is 12V present on the...

I just finished fixing up a Mac 512K. It works like new, including the internal floppy drive. But the external 400K drive is making me mad. It is a SONY OA-D34V-22. At first, the mechanism was stuck. This was easy to remedy. I also noticed that the pressure pad was missing. But then, when I...

I replaced the IC with a new one, and now it works correctly. It still whines for a second or so, but I believe that this is normal. But, now I discovered that the display flat cable is broken, as I can't adjust the contrast (it goes only up, but not down). Is there a way to repair the cable...

I solved the problem. The picture came at different screen angles, so I figured that it must be the connection issue. I took the whole PB apart, cleaned all the connections with the contact cleaner and then put it all back together. I also checked the LCD screen, and it has some electrolytics...

I just bought myself a nice condition PB 520c which was said to be working. When I powered it on, it only showed white picture, so I guessed that the contrast must be off or something. I perhaps saw a very very faint picture in the background of the Mac OS loading screen. The contrast control...

Yup, I recently recapped two PowerBook 230 Duos which both of them had major capacitor leakage. One of them sadly decided to quit working shortly afterwards, I believe that it was probably because of capacitor leakage. You can quickly check for the leakage by simply lifting the keyboard. If the...

Thanks. So apparently my PB 170 is just fine. I always thought that every 1xx PB supported SCSI disk mode...