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Type: Posts; User: bibilit

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  1. Replies
    2
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    593

    When you say is dead, what do you mean ? Not...

    When you say is dead, what do you mean ?

    Not responding at all, no LED, no sound, no spin ....
  2. Drive speed can also be an issue, speed should be...

    Drive speed can also be an issue, speed should be set just a bit under the 300 Rpm mark
  3. Replies
    5
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    533

    Something about the switches being pushed down or...

    Something about the switches being pushed down or the Joystick stuck to the left ?

    What kind of Joystick are you talking about, the original Apple or any suitable one ?

    The original Apple can...
  4. Replies
    91
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    11,975

    usual chips going wrong are the 74LS125 on the...

    usual chips going wrong are the 74LS125 on the Disk II Analog board (seen this a hundred times) usually the drive spins but does nothing and the ULN 2003 (the stepping motor won't move)

    Those can...
  5. Replies
    19
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    1,574

    I agree a 100%, always been able to sort out bad...

    I agree a 100%, always been able to sort out bad ram piggybacking, KC9UDX is right, sometimes a slight improvement is a sign a bad ram is located.

    When no change is found, ram is ok.
  6. The optoisolator is often faulty (CNY17 or...

    The optoisolator is often faulty (CNY17 or equivalent)
  7. Replies
    2
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    1,018

    You can have a try and remove not working keys. ...

    You can have a try and remove not working keys.

    Those are soldered and hold to the board by two plastic clips, keys can then cleaned on the inside (take care when opening the two halves, the...
  8. Replies
    6
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    846

    Classic and Classic II are using a very close...

    Classic and Classic II are using a very close setup, capacitors needed are the same.
  9. Replies
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    846

    Nope, The Classic and Classic II range should...

    Nope,

    The Classic and Classic II range should have AB boards recapped as well, very prone to failure.
  10. Two diodes are known to be bad on those AB...

    Two diodes are known to be bad on those AB boards, and cannot be detected (they are not shorted, just leaky) DP3 and DP4 (located near the IC : TDA4605) pretty common diodes 1N4148.

    You can...
  11. There is a lot of stuff, several Apple IIgs...

    There is a lot of stuff, several Apple IIgs units, IIcs, Apple IIs and what looks like a black Bell and Howell
  12. Replies
    14
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    1,358

    Depending on what you are looking for, you have...

    Depending on what you are looking for, you have got several options.

    If you are looking for an Apple II clone because is cheaper and compatible, well i have had a look at clone's prices, and some...
  13. Replies
    6
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    1,041

    If it"s a Flup Flup sound with nothing else on...

    If it"s a Flup Flup sound with nothing else on screen, probably the optoisolator U3.
  14. Replies
    16
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    2,255

    Not really, a small modification is required to...

    Not really, a small modification is required to upgrade the board (without, even with bigger ram, new memory won't be detected), the most difficult part is removing the old memory chips and upgrading...
  15. Most of those drives are fixable (more than the...

    Most of those drives are fixable (more than the average bigger, desktop unit)

    Not a 100% fix, but you can have a try:
    ...
  16. Replies
    22
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    3,582

    Very bad idea, except if you want say goodbye to...

    Very bad idea, except if you want say goodbye to your Portable... the Portable only needs 6 volts, other voltages are produced by the logic board.

    You need a good Main battery.

    Your Hybrid is...
  17. Replies
    22
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    3,582

    You should read those posts: ...

    You should read those posts:

    https://68kmla.org/forums/index.php?/topic/29975-yet-another-macintosh-portable-repair-thread/&page=2
    ...
  18. Replies
    22
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    3,582

    Not easy to see anything, pictures way too small....

    Not easy to see anything, pictures way too small.

    The power connector has four wires, two positive and two negatives, 6 volts should be present all the time in the two red wires, not 6,5 volts and...
  19. Replies
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    3,582

    Macintosh Portable is a fragile machine. First...

    Macintosh Portable is a fragile machine.

    First of all, every capacitor in the Logic board should be replaced (all of them) then the battery should be new and fully charged, if not, the Portable...
  20. Replies
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    2,043

    If i remember correctly, this chip goes bad when...

    If i remember correctly, this chip goes bad when disk drive connector is plugged incorrectly (in the Disk II drive at least)
  21. https://www.hardwaresecrets.com/inside-the-macinto...

    https://www.hardwaresecrets.com/inside-the-macintosh-plus/4/
  22. Probably, But keep in mind that a resistor...

    Probably,

    But keep in mind that a resistor should be cut in order to get 4 Mb
  23. Class codes 2 and 3 are related to bad memory. ...

    Class codes 2 and 3 are related to bad memory.

    Sad Mac Error Codes Description

    On the Original ROMs (Macintosh 128K 512k, Plus):

    When you press the interrupt button on the side of your...
  24. Replies
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    1,185

    Have you tried to hold the shift key to disable...

    Have you tried to hold the shift key to disable extensions ?

    Can be simply a bad file somewhere...
  25. Replies
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    1,296

    Won't work for long, the Analog board must been...

    Won't work for long, the Analog board must been touched up in several places, but once again pretty easy to do.

    https://www.applefritter.com/content/mac-plus-black-screen-after-inserting-floppy
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