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| Need Macintosh LC help! (giving no startup bong) |
Posted by: JRL on 2009-05-21 16:37:28
Alright, I was using my Macintosh LC when suddenly the monitor's image stretched and it immediately showed a grey screen. I had no choice but to turn on and off again.
When I restarted, there was no startup bong/HD activity and no image. :'(
can somebody help?
BTW: the PSU powered on the Macintosh LC; it didn't click. Also, the the battery isn't too old; maybe several years or so.
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Posted by: QuadSix50 on 2009-05-21 17:37:12
Have you tried on another monitor? What about the caps in the LC? Do they look OK?
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Posted by: Byrd on 2009-05-21 19:18:51
Have you tried the old "jumpstart" on-off-on in quick succession?
JB
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Posted by: JRL on 2009-05-21 19:27:32
Thanks everybody for the suggestions; I'll try them later after I let the Macintosh LC sit for a while.
However, I'm suspecting it's the PSU. D: It can't be the monitor, as the hard drive doesn't spin up.
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Posted by: QuadSix50 on 2009-05-22 06:43:49
Thanks everybody for the suggestions; I'll try them later after I let the Macintosh LC sit for a while.
However, I'm suspecting it's the PSU. D: It can't be the monitor, as the hard drive doesn't spin up. Sounds like you might have to try what Byrd said. I tried that once with the LC II we've talked about, but it didn't work. I just left it on and plugged in for a while until it actually booted up on its own. It seems that it doesn't like to be out of power for very long periods of time (I'm talking like months).
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Posted by: JRL on 2009-05-22 07:40:30
Also, this would help, right?
My Macintosh LC is the same apparent pre-production Macintosh LC as shown here;
http://www.fenestrated.net/~macman/
There is also a giant surface mount cap that has been leaking cap fluid on one of the chips. D: (not all over; just at one area)
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Posted by: Franklinstein on 2009-05-22 14:00:50
In my experience, the LC doesn't respond to bumping; the LC II doesn't require it, either. On that note, the Classic and Classic II don't use it, either. I don't remember about any of the Mac II series, but they were soft-power so they either wouldn't boot period without a good PRAM battery, or would work without issue.
If an LC won't show signs of life, it could have a bad power supply. The voltages may be listed on the power supply's casing, so with a voltmeter it could be tested.
My Macintosh LC is the same apparent pre-production Macintosh LC as shown here;
http://www.fenestrated.net/~macman/ I've got a preproduction model, myself. Mine has a very large radial-lead capacitor soldered to the board (as opposed to surface-mounted) and then hot-glued to the top of the SCSI chip; it also has windowed EEPROMs marked "Apple Confidential" in place of the normal ROM chips. I bought it at a thrift store in Oregon maybe six years ago, along with an FDHD-upgraded Mac II. Too bad I didn't also buy that boxed Laser 128 (which, I found out later, was an Apple II clone) that I saw there later on... I'll upload a picture of the LC's logic board when I find it.
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Posted by: JRL on 2009-05-22 14:17:01
Whoops; I thought that the hot glue was cap leakage. xD It is hot glue on mine too.
There is also a red CUDA button (unlike the normal LC's, as you might know); would that help?
I will definetly replace the PSU. It does turn on; it's just that it won't spin up a HD/give off a display/startup chime.
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Posted by: JRL on 2009-08-04 19:49:45
After working for a bit, it isn't again. 🙁
It seems like it's the logic board's fault. Does anybody have a cheap Macintosh LC motherboard they can sell me for cheap?
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Posted by: Unknown_K on 2009-08-05 01:16:01
Why not just recap the motherboard? I can do it for $20 plus parts and you play shipping both ways. Any replacement boards you get are going to do the same thing because of age. I have a recapped LC3 on the shelf but you need a LC2 correct?
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Posted by: JRL on 2009-08-05 07:13:54
Well, I really don't have any time, as much as I'd like to do it myself. 😛
I need a Macintosh LC board but if I can't find one, a Macintosh LC II or even maybe a LC III board would work, I guess. Still want to keep it stock though.
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