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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: guru-666 on July 09, 2007, 06:18:37 PM
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I think my power supply has gone bad. Simply can't get any action to happen. Do I need to check with a volt meter or are there any other ways to test?
I hear regular at supplies work, but do they fit? anybody find a good brand or have a good source?
I was running a full house, toaster/flyer, par, tbc, Picasso IV and mkII060 with 2 hard drives, so I'm sure that puts a strain on the PS.
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The 4000T is probably the easiest Amiga for which to source a new PSU. Mine died a few months back; replaced it with a standard 300W Antec. Strangely, I had to file down some plastic on the new P8/P9 connectors, but otherwise it's working fine.
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where did you get it?
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Micro Center (http://www.microcenter.com), a few years ago - was keeping it around as a spare.
I know AT supplies are getting harder to find, but there's probably still a few online shops that have them.
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so the general size, form factor is not an issue? are all AT PS the same size?
ALSO how did it work out with the power switch?
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No problem with the physical fit. The power switch was a moderate effort as it required dismantling the whole LED assembly. I didn't need to cut or solder anything if that's what you're worried about.
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how did you connect the power switch? not sure how that part will work think I found a suitable PSU
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You should just be able to unmount the old switch and put in the new one. It's a standard mounting.
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thanks, let you know once I get it working!
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Well, I still have not fixed this. The problem is odd to me. -when I disconnect p8/p9 connectors the power supply turns on
-once I connect the p8/p9 connectors to the MB the power supply does nothing (the fan does not come on)
-if plug in only one of the p8/p9 the power sully fan spins.
-if I plug in only hd ans such, they get power.
-I am not sure I am measuring the power the right way, but I think I get 5 volts.
HELP
I got another PS off ebay, but it was not working....
-I have removed the battery on the MB because it was not working.
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hum, sounds like a short circuit, or a dead "leaking" cap
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What do you have inside the A4000?
My advice: strip the machine to the bare motherboard, test the PSU. Add the CPU board, test again. Add the Floppy drive, etc.
A bad cap in the motherboard can make a short-circuit who simply prevents the PSU to start (they have a "crowbar sensor" to avoid destroying everything when a short is detected).
Also a bad floppy or bad keyboard can make funny things to circuit.
Simply test one thing after another. Boring, yes, but the only way to discover where the problem lies.
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I am finally taking a look at this issue again....
How do I find "A bad cap" on the mb? I have striped the machine down to the bare bones.....
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FIXED IT!!!!!
Oh man it was not even a power supply issue! I had the audio video module on the wrong way.... DOH!
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Glad to hear you're back up and running.
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I'm replying on the 4000(t).... I'm even back online! :lol:
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Taking the threads topic, I remember some time ago reading about the 4000T psu's harming the motherboard, even making it brown in some places. Was this due to the original PSU or it's a design problem with the motherboard ?
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Hi,
So does any AT Powersupply work fine on Amiga 4000T?
No need to check voltages on connectors? I mean was it a simple swap, plug & play for amiga 4000T owners? anyone consider getting the elbox adapters for atx powersupplies???
thanks.
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Yes standard AT power supplies can be used in the 4000(t) they have the same form factor.
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Can anybody answer my question above ? :pint: