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Everything posted by plb007

  1. Hi everybody, I'm currently restoring a few Mac II I have. One of them is working fine (when jump-started). I can't find any tantalum or radial electrolytic capacitors (those who generally leaks), but found only axial one (less subject to leaking). What would you recommend for putting them in storage ? Replacing them ?
  2. Hi, Yes, i tried with additional RAM (with properly configured jumper) and without (switching the jumper) with no chance to get it boot.
  3. Hi, I've got a similar problem, but without the second line (00000000) Did you fix your problem, and (if yes) how ? My recapped classic boots fine without the ram expansion in, but boot with this memory error when inside. Regards,
  4. Hi, I just recap a Macintosh Classic I bought (didn't try before recapping) The motherboard is in good condition before (and after) recapping. When memory expansion module is installed, I got a 00000005 sad mac error code. Without the expansion module, the unit boot fine (but can't finish the boot because system 7 needs more ram) . I tried swapping with a known working module without any luck. So, I guess the problem must be located on the motherboard. Where can I look first ? Thanks,
  5. Second cleaning, does it looks still bad ? I guess not that much but still too much !
  6. First clean .... How does it look ?
  7. Hi, I recently acquired a SE/30 with just a white horizontal line on the screen. When opening, I found the Maxwell battery has leak (usual). Is it worth repairing it ? Do you think it's possible to make it alive again ? I will clean the board and post pictures when it's clean.
  8. Hi everybody, During these "forced" holidays, I decide to dig into my Mac collection, especially Mac Mac II. I have 2 Mac II, the first one appears to be original. It won't boot but I doubt the battery are completely dead and it needs battery to start. Does it need both batteries to start or just one. What are the best replacement for those (convenient, mine are soldered). It doesn't seems to received damage from leaking battery or capacitors. Would you recommend to replace them even if they looks good ? The second one is a Mac IIx motherboard inside a Mac II case. But they ar
  9. For those who are interested, here's a picture of the screen from the TAM and from the 3400c, not the same supplier. It might be different from country (I live in Belgium !)
  10. Hi guys, I fixed the problem by replacing the screen with an old 3400 screen. Not a simple procedure, I broke two latches from the TAM, but everything went well. Thanks for the info.
  11. An 3400c screen is coming for the swap. I'll take you informed of the result. Regards
  12. I'll try to find a 3400 for spare. How can you explain the LCD failure ? The backlight is still working well. Which part of the LCD screen is subject to fail ? Thanks for the info.
  13. Hi, I just tried to reboot my 20th anniversary macintosh this sunday. It seems to boot right, but the screen stays white. I'm pretty sure it boots fine because it reacts to volume switch, birthness and power off. The last time it booted was less than 1 years ago. No changes (except powering down for this period). I tried the usual stuff (NVRAM, reset, battery check, ....) without any luck. I've made a video showing to process. Starting - waiting the TAM to boot, green light, actual booting, controls working, powering down. IMG_0991.MOV
  14. I still have the card, I can once try to replace the capacitors.
  15. Hi, I didn't try to replace capacitors on the processor card. I just swap with another one. They are very cheap on eBay ... But I wonder if the captors are the cause of the problem. They look clean but I guess they can leak too.
  16. Hi, Thanks for your replies. The issue was a bad processor card. Earlier 8600's can use 8500's processor (And the opposite too). It seems that processor card can also gone bad with time (like capacitors on older motherboard).
  17. Here's a pictures of both my LCIII's, one with the "fix", one without (REV D board). Those boards are european, so the problem with early/bad board production was worldwide.
  18. Thanks for your answer, I tried to dismantle everything today with no luck. I mean I think I can take it apart but with no idea how to reassemble it later. Some bolt and/or nuts will fall inside the computer and I have no idea how to put them together. For now it's on hold as I need some place in my desktop. There's no need to rush as nothing seems to leak everywhere in the main board. I'll try first to power it as if it is from stock and then add elements one by one.
  19. This might be an Megascreen I as there's a cooling fan in the setup. I'll try to take it apart. I can't remove the logic board as it seems to hold a cable to another board. I need to figure out the disassembly order first. I'm impressed how they packed all that stuff inside this small case. I guess there's no hard drive inside. What's the sad mac 02FFFF meaning ?
  20. Hi, I have a mac plus with an extra db9 cable going through the security hole and don't know what is it. The computer was heavier than the others. As I have a sad mac icon at startup, I decide to open the computer to have a look inside. The computer is very full of extra component. It looks that there's an extra power supply just under the screen, an extra card at the back of the computer, an extra card packed at the logic board and a extra fan (or a relocation) to cool everything. Does someone have information on this setup ? The back's card has "Micro
  21. Hi, Following my "classic" and "IIci" failure due to capacitor and battery leak, I went to check my 128k & 512k. As they powers as usual, with sound, bright and crisp screen, is it necessary or recommended to change the caps ? Are they subject to leak as classic and SE30's ? Does analog board and logic board needs recapping ? Is there a "list" of more leaking mac. I see a lot of classic (1&2 + color) and SE30's, but less of the others compact mac. Regards
  22. Hi, If needed, here's a copy of the PSU pinout .... Regards
  23. Hi, I have a working 8500 and a WS8550 that wasn't booting. No chime, just fan and hard disc spin. I thought it was the motherboard because of the battery leak, I found a new MB in perfect condition. No luck, same symptoms. It turns to be the processor card. I put the 8500's processor card and it started. I found 2 cheap processors card and one of them was defective. When processor card is defective, there's no boot chime, just the fan and disc spinning, nothing on screen. I really don't know how to check the processor card outside the computer. I can also assure you that the 8500
  24. Hi, I have a lot of old Mac computer here at home, I usually remove the 1/2 AA battery before putting them on storage, but It seems that I forgot this one. It looks in very bad shape. I start cleaning as much as I can and it start to look better. Can you guys help me resurrecting this computer ? I need to source some new replacement component. But which one ? Can the MMU and the Roms be saved ? (Dishwasher ? ) I need to find the little round component that goes off near there Y5 - 32.768 Khz. Is a clock (quartz ?) I'm waiting for your comments. Have a look at the pictures ...
  25. Hi, As part of resurrecting an old PM8500, can I use the processor card from a 8600/9600 series ? I have one that can act as a donor but it's a 350 Mhz processor. I know the internal bus speed won't go faster, but I wonder if the computer will/must be able to boot with that processor card. Regards,
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