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  1. Thread: Ti-99/4a issue

    by KenEG
    Replies
    3
    Views
    562

    Great. Glad you got it working. I hate coming...

    Great. Glad you got it working. I hate coming along behind someone who did a lousy repair. A lot of time undoing what they did is harder than doing the repair right.
  2. Thread: Ti-99/4a issue

    by KenEG
    Replies
    3
    Views
    562

    I am far from being an expert, but I have watched...

    I am far from being an expert, but I have watched lots of youtube repair videos. If you can get a known good video chip, that would be a reasonable plae to start, since it is the only socketed chip....
  3. Replies
    4
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    393

    jrconfig is changing the video mode. I just...

    jrconfig is changing the video mode. I just added BW80 early in my autoexec.bat to change it back.
  4. I don't know. Is there a way to tell without...

    I don't know. Is there a way to tell without disassembling the computer? I have the system stored right now but could hook it back up to check. I did check the SCSI ZIP. The termination switch is...
  5. I have a Mac 512 that was upgraded to a Plus. I...

    I have a Mac 512 that was upgraded to a Plus. I have two SCSI ZIP drives that work with it. I used a parallel port ZIP to on a Win XP computer to get images onto the disks and they work fine. It...
  6. Replies
    4
    Views
    566

    If anyone is interested, make me an offer. If I...

    If anyone is interested, make me an offer. If I don't have any takers in a few days, I will put it on eBay.
  7. Replies
    4
    Views
    566

    Yes, it has a place for the CDs behind the lower...

    Yes, it has a place for the CDs behind the lower front cover, but, unfortunately, not the CDs. I do like the style a lot.
  8. Replies
    4
    Views
    566

    Compaq "tweener" computer

    I have a Compaq Presario computer for sale. It has a fresh install of Windows ME on it via the restore partition. I think it would make a good "tweener", especially if the 32X CD-ROM drive was...
  9. Replies
    3
    Views
    571

    You can try it that way, but I think the power...

    You can try it that way, but I think the power supply went in the back left of the case. The narrow opening was where the power switch was and the one that is almost square is where the power cord...
  10. Replies
    3
    Views
    571

    The two connected PCBs are, I believe, a standard...

    The two connected PCBs are, I believe, a standard PCJR disk drive controller and an add on that enables it to controller a second drive. It is a different way to do the same thing the Quadram unit...
  11. You could probably do this, but it might be...

    You could probably do this, but it might be better to buy the IBM parallel port sidecar and do the bidirectional modification. That is what I have and it is much faster than a monodirectional port,...
  12. They are different scan frequencies, so that is...

    They are different scan frequencies, so that is what I would expect. You would need a multisync monitor to do both with one monitor.
  13. Replies
    15
    Views
    3,461

    I would try sealing the computer in a large...

    I would try sealing the computer in a large plastic bag with a few silica gel bags. If the issue is moisture, that should cure it.
  14. Replies
    47
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    4,984

    I realize it has been a while since my last...

    I realize it has been a while since my last update. I got the battery so it now holds the correct date, time, and control panel settings. The eject mechanism of the disk drive quit...broken gear. ...
  15. It could simply be a mismatch between the monitor...

    It could simply be a mismatch between the monitor and graphics mode. If you have another monitor, I would try that first. It could also be the video cable either picking up interference from...
  16. Replies
    7
    Views
    1,095

    Could also be for a Compact Mac like the Mac Plus.

    Could also be for a Compact Mac like the Mac Plus.
  17. First thing would be to replace the capacitors. ...

    First thing would be to replace the capacitors. They often short out when they get old and draw the voltages down too low for the drive to work. Next would be to swap chips between the working...
  18. Just a thought, but maybe there is a problem with...

    Just a thought, but maybe there is a problem with the interrupt controller or supporting circuitry? You might try another card like a sound card and use interrupts 3 and 4 to see if they work. I'm...
  19. Since the onboard serial port also doesn't work,...

    Since the onboard serial port also doesn't work, maybe you have a motherboard problem?
  20. Replies
    4
    Views
    727

    A lot of laptop power receptacles go bad or the...

    A lot of laptop power receptacles go bad or the solder connections crack due to the repeated plugging and unplugging. I would start there.
  21. Replies
    7
    Views
    900

    I just looked at the SDS and agree that it...

    I just looked at the SDS and agree that it shouldn't hurt anything. It may leave a residue that could attract dust, your IPA wash should remove that.
  22. Replies
    6
    Views
    745

    You can try “canned air” when the errors occur. ...

    You can try “canned air” when the errors occur. Spray it on each chip in the hot area. If the error goes away, you have found the bad chip.
  23. I just restored a Macintosh Plus. Finding...

    I just restored a Macintosh Plus. Finding affordable keyboard and mouse was a real challenge and cost me more than the computer. I think there would be more demand for converters that let you use...
  24. Replies
    47
    Views
    4,984

    Got a keyboard and mouse today. Soldered in RIFA...

    Got a keyboard and mouse today. Soldered in RIFA capacitor, adjusted the voltage, height, width and cutoff. Re-assembled the computer and hooked up the mouse and keyboard. Glad to report...
  25. Replies
    13
    Views
    1,331

    I often plug in my laptop when it is on and the...

    I often plug in my laptop when it is on and the battery gets low. I have done it both ways and don't think it makes a difference on modern equipment. I would think the battery would tend to even...
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