A4000T PSU - should I replace it?

[X-ray]

Your current AT PSU has a switch from the PSU to the front bezel of the Tower.
You'll need a converter that retains that switch or at least has the leads that you can connect to your existing switch. I replaced the whole lot (a bit more work because the switch panel on the bezel must come off).

[X-ray]

Here is one where they don't sell the switch:

http://www.power-on.com/images/product/accessories/atxtoat2.jpg

[Everblue]

Ok, now it makes sense. I still have to find an ATX PSU that fits now.

[Everblue]

Here is one where they don't sell the switch:

http://www.power-on.com/images/product/accessories/atxtoat2.jpg

Hmmm, so if I get one of those, I assume I can leave the switch in the ON/OFF button on the front or I have to cut cables/reconnect? I really dont want to do any DIY modjobs.

Basically I want to replace the CPU without modding.

THanks!

[X-ray]

You won't have to cut: the cable ends clip on to the switch tabs. There is no cutting or modding at all, the only thing you have to be sure of is securing the cables properly.

[Everblue]

Ah great...  So now, I have two options:

1. Get an AT PSU

2. Find an ATX PSU which fits the holes + Adapter

I would go for option 2 but I have no idea where I can find an ATX PSU that fits as they seem that the screws are completely different, at least on the 2 i got.

[X-ray]

I'll have a look at mine and see what gives.

[Everblue]

Thanks please

[X-ray]

OK see here:

http://www.amiga.org/gallery/index.php?n=2737&page=1#comment14648

No problem, all 4 screws aligned.
By the way, ignore the little bracket inside the Amiga case which rests on the upper surface of the PSU.

[Moto]

The position of the PSU in the A4000T is not really clever at all. It is mounted so that you lose a good amount of space above it. That and the difficulty accessing the innards makes the A4000T case not such a great design functionally. I don't think that installing a smaller PSU will help.

AT PSU: I got mine from a local computer fair a while back, for £6. That vendor isn't there anymore, so online will have to be the next step. But....I would go the ATX route instead. Get rid of the AT, and then open up your options considerably.

What would be the advantage of using an ATX PSU over an AT one in the 4000T?

[Everblue]

OK see here:

http://www.amiga.org/gallery/index.php?n=2737&page=1#comment14648

No problem, all 4 screws aligned.
By the way, ignore the little bracket inside the Amiga case which rests on the upper surface of the PSU.

Thanks for the photos

Is this one upside down?

http://i55.photobucket.com/albums/g154/Odd_Job/Photo059.jpg

[X-ray]

Oops it is upside down, yes.

[X-ray]

"....What would be the advantage of using an ATX PSU over an AT one in the 4000T..."
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For me it is about sticking with newer technology. Might get better cable management, a quieter PSU, that sort of thing.

[rkauer]

ATX PSU have all the rails regulated independently.

 AT had only the main rail regulated (5V). Some AT even regulated itself from the 12V rail!!!