matthew@sunpix.UUCP ( Sun NCAA) (04/22/89)
In article <23317@agate.BERKELEY.EDU}, laba-1hi@e260-2g.berkeley.edu (Mikey) writes: } } I've had a problem with my Apple //e that has gotten progressively worse. } Sometimes, when I turn on the power, all I hear is a low clicking sound, and } the power light on the keyboard remains dark. I used to think that the culprit } was a bad connection somewhere, so I just shut down and retried again. It } always worked the 2nd or 3rd time. } } Until now. Now, all I get is that mysterious buzzing/clicking sound. Also, } I noticed that the LED on the motherboard as well as the LED's on my Disk II's } (yes, I have antique disk drives) flicker as I hear this buzzing. Also, when } I shut off power, the motherboard LED just flickers and fades to black instead } of a crisp shutoff. } } I suspect my power supply, but I'm not sure. Can anyone diagnose these } problems and help me out? The life of my //e is crucial since I run a BBS on } it. Thanks! } -------------------------------------------------------------------------- } I'd appreciate it if you could reply via EMAIL. I'm not able to access the } net that often. Thanks a lot!! } laba-1hi@web.berkeley.edu............................................Mikey } *** Call Tanelorn III! (415) 540-1180. The Apple/Mac BBS of Berkeley. *** The Power supply in an Apple // is called a switching power supply. I won't go into details, but the symptoms you are describing, correspond to shorting cond- ition on the output of the power supply. (Power supply detects shorted output and shutsdown, waits a little while and tries restarting. If the output is still shorted it shutsdown again. This cycle continues until the short is removed.) You described your Disk ][ as still being attached. As with any troubleshooting of this type, remove the cards from all slots. If the problem is still present, you've got a short on the motherboard. If the problem goes away, test each card in its slot until the problem reappears. If you can recreate the problem by trying one card at a time, and you have a lot of cards, you're drawing to much power from your power supply, get a heavier one (they are available). Hope this helps. -- Matthew Lee Stier | Sun Microsystems --- RTP, NC 27709-3447 | "Wisconsin Escapee" uucp: { sun, mcnc!rti }!sunpix!matthew | phone: (919) 469-8300 fax: (919) 460-8355 |
jla@hogbbs.Fidonet.Org (Slartibartfast) (04/27/89)
-> Until now. Now, all I get is that mysterious
-> buzzing/clicking sound. Also,
-> I noticed that the LED on the motherboard as well as the
-> LED's on my Disk II's
An apple //e at my high school had the same problem. We replaced the Power
Supply and every thing was fine. Although as matther@sunpix said, you
should check the cards first before you go out and replace the PS. Now I
have a question about Apple PS's. I run (actually used to) a BBS. I left
my computer on straight for about 2 years (you got it. NO down time!!!)
and now i have this problem when the power goes out I have to play for
approx. 30 mins. to an hour to get the thing to turn on. It doesn't seem
to be a switch problem, but an internal problem with the PS. Can anyone
shed any light on my problem (short of buying a new Supply).
Thanks,
Jim Anderson
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