My Second Non-working A1500

[Bamiga2002]

Maybe your PSU doesn't provide enough juice, what kind of PSU are you using?

[J-Golden]

Sounds like you've tried almost everything, but this YouTube clip migh give you some other ideas on how to deal with troublesome hardware:
http://www.youtube.com/watch?v=mv0onXhyLlE

:nervous: OH NO!  Don't do that, protective services will come and take your Amigas away!!!

[LordSpunky]

Sounds like you've tried almost everything, but this YouTube clip migh give you some other ideas on how to deal with troublesome hardware:
http://www.youtube.com/watch?v=mv0onXhyLlE

Hahaha! Yes very funny! It has crossed my mind!

Maybe your PSU doesn't provide enough juice, what kind of PSU are you using?

I'm using the standard 250W A2000 PSU.

Last night I lemon juiced and cleaned it with propyl just incase of battery damage.

[scuzzb494]

Some times you just have to accept that the thing is busted and short of tracing all the circuits and checking all the chips you probably will never really get to the bottom of it. I had a batch of 2000s once and some displayed this problem and I just swapped out the motherboard and salvaged the good stuff. Better still use the case for a 1200... See below.

On the pages from my site there are some useful jumper settings and circuit diagrams which may be of use. But I have struggled with a grey screen as it generally means no life in the girl really. Think you said you had changed the ROM. Have you checked the underside of the motherboard for cracks.

Anyway a few pics from the website of some of my kit. I had 3 bits of good luck with 1500s. The first I bought I was also given an A3000T as the guy wanted to get rid of it. The second was mint in its original box... just needed to replace the battery. And the third had an Amiga 1200 inside. I call the machine Graham. Lost count how many 1500s I now have, probably around five. But then I have like about a dozen 2000s.

Anyway I have picked up stuff from Yeovil in the past. Just trying to remember what it was. We don't actually live that far away from each other. Anyway... good luck

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz222.htm

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz20.htm

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz109.htm

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz276.htm

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz171.htm

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz92.htm

[Bamiga2002]

I just love the A2000 keyboard! Very nice

[rkidd7952]

Hi,

I recently picked up an A2000 that had been sitting for several years.  It showed similar symptoms to yours when I first powered it up.  If you haven't already, try removing and reseating the 68000.  While the CPU is out, check the socket for battery corrosion.

In my case, the corrosion had spread to about half the pins on the CPU socket, and most of the legs on the CPU were oxidized all the way to the plastic case.  I ended up following the steps in this thread (http://www.amiga.org/forums/showthread.php?t=40875) to replace the socket.  I cleaned the oxidation from the legs on the CPU, reinstalled it, and the system booted to the insert floppy screen.

As part of the work, I checked the continuity for each pin on the CPU socket, then rechecked from each CPU pin once I reinstalled the cleaned processor.  Most of the pins are available on the CPU slot or a nearby via.  Pages 2 and 13 in the A2000 schematic (http://amiga.serveftp.net/schematics.html) were very helpful here.

Robert

[LordSpunky]

Hi,

I recently picked up an A2000 that had been sitting for several years.  It showed similar symptoms to yours when I first powered it up.  If you haven't already, try removing and reseating the 68000.  While the CPU is out, check the socket for battery corrosion.

In my case, the corrosion had spread to about half the pins on the CPU socket, and most of the legs on the CPU were oxidized all the way to the plastic case.  I ended up following the steps in this thread (http://www.amiga.org/forums/showthread.php?t=40875) to replace the socket.  I cleaned the oxidation from the legs on the CPU, reinstalled it, and the system booted to the insert floppy screen.

As part of the work, I checked the continuity for each pin on the CPU socket, then rechecked from each CPU pin once I reinstalled the cleaned processor.  Most of the pins are available on the CPU slot or a nearby via.  Pages 2 and 13 in the A2000 schematic (http://amiga.serveftp.net/schematics.html) were very helpful here.

Robert

Thanks for the schematic link, I will have a look at the sockets more closely.

Some times you just have to accept that the thing is busted and short of tracing all the circuits and checking all the chips you probably will never really get to the bottom of it. I had a batch of 2000s once and some displayed this problem and I just swapped out the motherboard and salvaged the good stuff. Better still use the case for a 1200... See below.

On the pages from my site there are some useful jumper settings and circuit diagrams which may be of use. But I have struggled with a grey screen as it generally means no life in the girl really. Think you said you had changed the ROM. Have you checked the underside of the motherboard for cracks.

Anyway a few pics from the website of some of my kit. I had 3 bits of good luck with 1500s. The first I bought I was also given an A3000T as the guy wanted to get rid of it. The second was mint in its original box... just needed to replace the battery. And the third had an Amiga 1200 inside. I call the machine Graham. Lost count how many 1500s I now have, probably around five. But then I have like about a dozen 2000s.

Anyway I have picked up stuff from Yeovil in the past. Just trying to remember what it was. We don't actually live that far away from each other. Anyway... good luck

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz222.htm

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz20.htm

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz109.htm

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz276.htm

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz171.htm

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz92.htm

Hi Scuzz, thanks for the advice, even my wife suggest I give in and admit defeat, but I don't want to just yet

I've been a fan of your pages for quite some time - not that far from Yeovil? That's interesting, how far?

[amigakid]

I would firstly remove the barrel battery.  It looks like it has corrosion damage.  I finished restoring a A2500HD this summer that had battery damage to it.  Try to cleanup around the that area as good as you can.  Next remove everything extra in it such as expansion boards, drives, extra memory.  Reseat all the chips and power it on.  Take note of the power light flashing if it does and the sequence.  If no flashing start adding back peripherals one at a time.  Also look for corrosion around caps, resisters and such and if any are in question use a voltage meter to see if they are still good or need replacing.  One other thing is to look at the underside of the motherboard.  This is often overlooked.