----- Original Message ----- From: "Clark Martin" <[EMAIL PROTECTED]> To: "1st PowerMacs" <[EMAIL PROTECTED]> Sent: Sunday, March 28, 2004 9:17 AM Subject: Re: Performa 6200CD power-up problem
At 7:53 PM -0800 3/27/04, [EMAIL PROTECTED] wrote:
Check the voltage from the disk drive power connect for +5 and +12
OK, testing power supply output is the next step.
It may be starting up and then shutting down which would still produce the click.
The fuse body is ceramic. Try doing a resistance check on the fuse, it should read 0 ohms.
Many components in the power supply can fail with no visible sign.
What would cause it to start up, and then shut down? A faulty circuit somewhere on the power supply board?
Either a problem in the power supply (the over current protection is trigger at too low a current) or the logic board (something is shorted or overloading)
A ceramic fuse body... That makes more sense.
That's the Cuda button. It is something of a Super PRAM Zap.
How is it used? Is what I did the correct procedure: hold it down for about 30 seconds?
Yes, that will do.
It is quite reasonable to test a new battery, one never knows how long they may have sat on a shelf. Also try testing it a few days after putting it in the computer. If there is a fault in the PRAM circuitry it could drain the battery down.
OK.
The next step in testing would be to find another logic board and/or power supply to test with. I recently bought a used Beige G3 which wouldn't start up. I was able to test it with another identical model and it turned out to be the logic board.
Unfortunately, I am not going to spend a lot of money to get this thing fixed. I get older PowerMacs and vintage/compact Macs free from school systems and universities in western Washington. I just happened to come across a 6200 that otherwise looks to be in *PRISTINE* condition that I thought would make a good testing machine for my sister's web development. As I get these things for free, I am not looking to put a lot of money into them to get them running. The new 4.5 volt alkaline battery itself already ran me $18.50 (the an expensive damn battery) and a new power supply or logic board would be along the same lines, after shipping charges. If not more. That's easily $40 or more right there when I could spend less than half that to simply buy a whole new *even faster* Mac. And as I get them for free, there is no need to spend money on a new system at all.
AFAIK the all of the models with a slide out logic board can take the same logic board. These models include 5200, 5300, 5400, 6200, 6300, 6400 and 6500.
All the systems I get from schools and whatnot have all been claimed to *work* up until the time they got rid of them (gave them to me), which is why this situation puzzles me. I have acquired nearly 100 Mac's of different vintages (though none newer than a first generation PowerMac) in this manner, and this is the *only one* I have had any problems with to date. Philip Storz suggested that the power supplies are very volatile on these, and can be rendered useless simply from a move of locations. In this situation, this scenario sounds the most feasible since the machine was claimed to work before I got hold of it.
I've never known one to fail from being moved and I've moved a lot of computers around. Any computer can at anytime fail but the probability one WILL fail at any given time is quite low. Thus some computers will fail the first time they are powered up after being moved.
Anyway, I will take the voltometer to the disk drive power connector next to make sure the power supply is doing what it's supposed to. If it looks like the power supply is bad, I will try to get a hold of one through a trade (I have an entire room full of older Macintosh parts) rather than buying one. If it looks like the logic board is at fault, I will attempt to do the same for that. If nobody is interested in trading either of these for something I've got, well.... I've got a PowerMac 6360 on the way that I will donate to my sister, instead, and simply part-out the 6200. Though I had *hoped* to be able to keep the 6360 for my own collection.
You can use the PS and logic board of the 6360 to test the logic board and PS of the 6200 (respectively).
-- Clark Martin Redwood City, CA, USA Macintosh / Internet Consulting
"I'm a designated driver on the Information Super Highway"
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