Resurrecting Amiga 2000

I got this A2000HD from a very nice guy that used it for video production back in the old times. The machine wasn’t in the best shape, it came partly disassembled and very dirty.

A2000HD motherboard

I proceeded to remove the power supply and give the motherboard a good cleaning with a brush, compressed air, contact cleaner and isopropyl alcohol.

Years of dust

Cleaned A2000 motherboard!

Luckily somebody removed the NiCad battery, although it did some damage to the motherboard as seen in the following picture.

A2000 battery leak damage

The machine came equipped with a bunch of cards, accelerators, drive controllers, video, etc. Before testing the machine I removed all these upgrades except for the Mini Megi chip.

Upon firing it up, it didn’t show any signs of life, so first thing to check was the power supply. And in fact the PSU was dead, no voltages on any of the lines. Most easy fix for this was replacing the entire PSU with a new ATX one. A generic cheap one will work, luckily I have several of these lying around, so I took one and made some modifications to fit it inside the Amiga PSU case. I’ve also used the original Amiga PSU power cables.

Original Amiga 2000 PSU and fan stripped from its case

The PSU metal case

Amiga original PSU cables

ATX Power Supply

As I say before, you need an ATX power supply, but check that it has the -5 volts rail, the later ones don’t have this and the Amiga 2000 requires it. If you don’t find a PSU with -5v, you can make and easy modification and add a voltage regulator like the 7905 connected to the -12v rail. The PSU shown in the picture had the -5v line, so things were easier.

ATX PSU inside the Amiga PSU case

After some hours of soldering, I had a working Amiga 2000 PSU again! But before you can power up the Amiga, you need to change a jumper setting on the motherboard. Look for jumper J300 and close pins 2-3. This is due to a TICK signal, the original Amiga PSU provided this signal, but the new ATX doesn’t. With this setting the machine will take the signal from V-SYNC.

So let’s fire the machine up!

Amiga 2000 3.1 boot screen

WOW! the Workbench 3.1 boot screen! The Amiga was alive!

After this, I cleaned the computer case and dissasembled the floppy drive, as it must had years of dust inside.

Amiga 2000 case

A2000 Floppy drive test

After cleaning and lubricating the floppy drive, I tested it. It was in working order. Time to assemble things again and try the expansions cards.

SYSINFO

I’ve tried the accelerator cards, in the image above you can see the speed compared to other Amiga models. This card was the Apollo 2030/50mhz with 8mb RAM.

Amiga RTG

This is an RTG video card, it makes the Amiga capable of showing more colors and bigger resolutions. It outputs VGA.

Working A2000HD

I even installed a CD drive, one of the cards (Catweasel ZII – S Class) added support for IDE drives. I still have a couple of cards to test, but so far they all seems to work fine. With the CD drive installed I was able to upgrade the machine to OS 3.9.

I’ll be playing with this machine for a bit.

 

Dario

 

2 thoughts on “Resurrecting Amiga 2000

  1. Awesome work Dario!!!!!!!!!!!!
    My Amiga 2000 are sadly out of order the psu are dead 🙁
    I hope to make the ATX change as you do.
    Anyway great job!

  2. The Amiga has a rich history and a very active community—there are still games being made for these amazing machines. Aquabyss is a new game released in 2019, and demos are still being developed.

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