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HEEELP!! I restored my Powerbook 190 cs it 2 years ago, it was working perfectly until yesterday. Only problem was the PRAM battery to be replaced. After I replaced the battery (identical to the original) it worked for a while then stopped to boot. No way to restart. After several trials I...

No, you are not alone..... I've resurected another one after that one. :ROFLMAO:

Finally !!!!

Hello same problem here! Did you fix it?

Hi! Is there anyone who has a high resolution photo of bottom side (not component side) of original StyleWriter logic board? Note: there are 2 version of original SW, I'm looking for version 1 - the one in the pic. More over, anyone knows if a schematic of such logical board is available...

Exactly as mine. I disassembled the engine and carefully cleaned it with acid and oiled it, now it is fine. PSU: interesting point, i has only a capacitor or two and are not leaked, but I measured about 13V while in label reports 9V .....

I'm using a cartridge from ebay that was sealed. I think cartridge is good, does not seems clogged, the ink is not dry. Unfortunately I don't have another working printer to test the cartridge.... but it seems to me like the board does not drive the cartridge. I just mapped and checked...

Exactly! As suspected leaky caps have caused some more damage to the logic board. I just found 2 more corrosion under one stepper motor. Once fixed it paper management and printing movements behave correctly but unfortunately no ink is brushed on paper. Need more investigation to understand...

Hi all! I'm restoring an original StyleWriter V1. Using original power supply and a BC-01 cartdrige, after first turn-on, I've tried the 2 auto-test modes: (form-feed+power-on and ready+form-feed+power-on) but it behaves strangely, lot of noise, error light and so on..... I've opened it...

Hi all! Is the apple peripheral-8 cable equivalent to the mini-din 8 pin cable ? Thanks!

Yes, the picture is before recap, I replaced it with same type/value and 275V instead 250V. Anyway I decided to recap all electrolytics with others having equal/greater voltage, a part the one in le left of the coil that was 3.9uF unpolarized that I did not found but it is in good conditions...

Hello, just restored a nice 512k. All electrolitics in the analog board have been recaped. Every thing works nicely, the only thing I noted is the coil (in the analog board - check image) named L2 that get hot, about 80 °C. Is this temperature normal or there is something I have to check...

Hi! I have the same problem :( could you please give me coordinates/link where to find the connector? Thanks a lot

That's it! I didn't think about it! Many thanks!!

Hi, I just got a mac 512k from '85 in very good conditions. It boots regularly from floppy but no any chime at startup (non keyboard nor mouse). I decided to recap the analog board and the logic board, but no change, it boots but no chime at all. Any Ideas? Thanks a lot.

After some work i got this behaviour when turning on the mac: Quick checkerboard -> Sad Mac with stripes --(after a while)-> Vertical patterns. Any suggestion about the cause or about what to check?

Hi all, what are the differences between 820-0390-A and 820-0390-B models of Mac Classic Logic Board? Are they interchangeable? Thanks

Any other suggestions? Would it be worth buying an inexpensive logical analyzer to check what is going on on the board?

Hi marcelv, yes, I removed the battery holder at least twice to check the board, no problems. Recently I've also checked frequencies of CPU 7.8Mhz and 32.768 on RTC crystal and they are there.....

Hi @marcelv, yes, I removed the battery holder at least twice to check the board, no problems. Recently I've also checked frequencies of CPU 7.8Mhz and 32.768 on RTC crystal and they are there.....