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Everything posted by Nathanplus

  1. Just this christmas I got a macintosh se/30. I did a recap on it to bring back the sound and to bring back the occasional boot issues with the internal scsi. The internal scsi boots fine now no matter what, but neither my external scsi or external floppy ports boot. The machine starts up and when any external sources is in it gives the flashing floppy. Now I know its not the floppy since Its a emu and it works on my se and my plus. And I know its not my external scsi because It works fine when I use it on my other machines and it works when I put it in the machine. And yes there isn't the slightest of corrosion on the board, I was so surprised to see it in such good condition inside. I have cleaned both the ram slots and the ram. I also cleaned the slot for the rom and the rom itself. It boots fine with an internal but not external. It sees its there because it freezes at boot up to try and boot from the sources but it just wont from either.
  2. Nathanplus

    Macintosh se/30 wont boot from external sources

    Ok thanks I should change the forum but I just realised that it does boot to floppy but I didnt know that the hd/20 feature of the floppy emu wasn't supported by the mac se/30. Thats my bad but the external scsi still wont work so maybe thats another reason why It wont boot from the emu as the hdd setting.
  3. Nathanplus

    Fan replacement for a Mac SE/30

    They used the same sized box fans in the powersupply of the powermac g4 quick silvers. You can probably pick one of those up for cheap or see if a family member has one.
  4. Hi I have owned this macintosh plus for over a year now and have gotten very close to fixing it but now I have a problem. My mac has no picture and has a quiet humming from LF1 I think due to me putting a higher capasitance for replacing the rifa caps. What really changes is the short between Q3 and C2 both were replaced but still get hot. No the flyback doesn't get hot and no its not cold solder joints or cable I check the continuity and reflowed it all. When turned on heat flows out of the grounding trace between the two. Idk whats up with it here is a pic. Maximum amount of degrees is about 230 Fahrenheit. I think CR5 is shorted.
  5. Did you make sure to check that you have the ram configured correctly as in using a jumper for the correct same amount of ram you had put in? also check to see if your computer accepts that type of ram. For EXAMPLE my Macintosh se doesn't aloud the 2 chip sims, in my machine they arn't compatible like the se/30 is. And that board to me Idk if I'm right to be some sort of accelerator card for high powered graphic work thats why it adds the extra ram, I would also try reseating the chip and ram and cleaning all contacts with alcohol as usual.
  6. Nathanplus

    Mac Plus Flyback Compatibility

    yeah I did a crt swap you just have to switch the yokes carefully, but yes it works great in the SE I put it in
  7. Hi I have recently had some sad knew that one of my once good flybacks has been killed in my Macintosh plus due to a bad Q3 transistor, after replacing it both the once good and the bad flybacks make a humming noise and there is no picture. Also the new Q3 get really hot and there is a short across the 4700 capacitor. I was thinking that because I have a good Macintosh classic II analog board just sitting in a empty case in its original box, I could maybe find a way to use it on my Macintosh plus by re wiring it. I know that it has no clock battery insert but if its not needed I'll leave it our of the question. But I know unlike the se; the Macintosh plus and classics have the outside speaker. If this is possible and someone has done it before I would be so grateful if someone could walk me through. I still have the yolk for the classic two so that wont be a problem to switch, I just one my other Macintosh plus to work without having to pay $100 for a stupid coil. I will be looking into the schematics but I have been very tired and busy lately to come up with a diagram made.
  8. Nathanplus

    Macintosh Plus reboot in a loop or vertical bars

    I did have them once but it not always the case. Its only the roms when there is a short to ground. The first time I tried to put a scsi connector in my plus I fried the roms but other than that I haven't seen a computer with normal config do that unless there is corrosion.
  9. Nathanplus

    SCSI drive won't spin up! Ideas?

    Real quick if you start to have the same problem again but its not the psu. The likely reason that i have come across is bed caps so look into replacing them while you can
  10. Nathanplus

    This Does Not Compute SE/30

    Really quick I know this is an SE/30 but I was scrolling though Dead Mac Scrolls and one looked similar to The Programmer switch maybe being stuck. It sometimes also has out comes like this one.
  11. Nathanplus

    SE/30 with graphics issue

    oh so it does it without the ram ok so it has to be roms or a connection issue
  12. Nathanplus

    Mac SE - checkerboard and repeated chimes

    Oh crap sorry let me think... It hast to be a resistor or a cap some analog part that takes a while to heat up right along the video out pin. It could be an voltage rectifier. I know a conman issue is the connector to the motherboard and it could need a cleaning use some metal polish I'll look into the situation you are experiencing.
  13. Nathanplus

    Macintosh Plus Internal Hard Drive *Mod*

    wait why is RST on the wrong side of NRC 5380
  14. Nathanplus

    Mac SE - checkerboard and repeated chimes

    Have you ruled out if its a bad ram card because if one chip on one card fails the whole machine wont boot and having issues that are rare to find a solution for online. What you want to do is check each ram card by pulling them out and testing them 1 by 1 in a 512 configuration. If that dont work try testing the cable connecting the AB to the MB it could need to be cleaned. And if all fails it could be ROM's.
  15. Nathanplus

    This Does Not Compute SE/30

    Um sorry but I don't know If you have not covered this yet but, I have two suggestions. I have had many compaq macs end up having corrupted screens. If I were you I would look up ram configurations and manual test each ram card in the SE/30 and another mac that excepts the ram cards. To me that board looks fantastic and should not be to tough to get working. Another suggestion is checking the cable from the AB to MB board to check if the pins need to be metal polished. With any SE I've seen it has not been a problem but with Macintosh plus's its a common occurrence so I would just check incase that its that simple. I have not ever seen a macintosh SE need a big recap unless it was completely cooked due to over voltage but due to the air cooling fan and good parts even the worse one's I've seen could be fixed. If you acquire some big problem it like every one else says would be the ROM's but I rarely see that and again the Macintosh would probable looked like it had been cooked over an oven the board probably would have battery acid all over it and would be screwed. In summary I would check the obvious before going strait to hard stuff thats my advice it will save you alot of time and work. BTW: when I mean clean the pins I mean the pins directly on the two boards and the connector I know you have already checked the voltages but its always good to see if your getting the best connection
  16. Nathanplus

    Macintosh Plus reboot in a loop or vertical bars

    I had the same vertical bars so I thought I messed my plus up but when I turned the cut off down it booted so I dont know what thats about probably I have a crap cable
  17. Nathanplus

    Macintosh SE with horizontal lines, no chime

    Always start by re inserting the ram after cleaning each one with isopropyl alcohol. If that doesn't work try configuring the SE with 512k and check each ram stick by swaping them untill you get the machine working.
  18. Nathanplus

    Help screen shrinking mac plus

    So I have come across a problem with my macintosh plus and that over time the screen horizontally starts to shrink. I dont know what could cause this and im not home to do research. It might be the flyback but idk.
  19. Nathanplus

    Macintosh Plus reboot in a loop or vertical bars

    Another problem that could cause this is that your 12 volt line is low and that to test this just unplug your floppy drive and see if it boots. If it does there are alot of forums about how to fix the problem online.
  20. Nathanplus

    Macintosh Plus reboot in a loop or vertical bars

    I would turn down the voltage cut off and it should fix the problem which I think is a easy fix. Its good that its not your mother board I can assure you its not. I think the other AB just needs a recap and a little ajustment.
  21. So I purchased a macintosh plus to fix my other macintosh (Which finaly after 4 months I figured out that the 1000 uf capasitors tolerance made them off set and didnt work correctly and that the tsm chips on both of my MBs are dead) so this new mac has started to have issues with the screen and voltage settings. The screen started to move to the bottlem left of the crt and the voltage was tripping the power and I would have to constantly change the voltage pot. So I ended up replacing the 2200 and 1000 uf caps. It fixed the voltage but not the screen issues. Even trying the horrisontal setting and vertical it would not move the screen back to the center. Im pretty sure its the fly back or the 3uf cap in next to the horizontal setting. But I want to know if anyone else has had this issue. The boot sound also sometimes drifts away too. Its sometimes quiet then sometimes loud. I cant upload a pic at the moment becuse my service is bad right now.
  22. Nathanplus

    Macintosh plus screen centering issue

    Ok so thats fixed but I still am haveing another problem I should have mentioned. The brightness knob does not work what so ever and there is no cracks in the solider, the sound issues, and the focus ajustment barely works either.
  23. Nathanplus

    Macintosh plus screen centering issue

    Ok ill try it now
  24. Nathanplus

    Mac Plus Ticking Noise...

    I would first replace the 1000uf and 2200uf caps then check to see if your connector needs cleaning. If non of that works I would check the MB to see if your tsm chip has fried I have 2 boards with dead chips. I would also check to see if your flyback is good and if any other caps are cracked ot leaky. I have.had many macs that died during working on them. The mac plus I think is by far the worst and not fun either because they are so random even in perfect condition.
  25. Nathanplus

    Macintosh Plus reboot in a loop or vertical bars

    Check the voltage pot i had that issue multiple times I would do a full recap after ajusting it to see if its your problem. You would want to turn it to the positive side a little it looks like your putting a little too much power into the MB