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Author Topic: Dying A3000D?  (Read 1426 times)

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Offline AmidufferTopic starter

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Dying A3000D?
« on: May 03, 2009, 07:36:40 PM »
Hiya all.

I've developed a problem with the old A3k. Hope you can help me fix it.

Its developed a problem in the video signal after I got some Zip ram from Redrumola and installed them. The dreaded green boot screen, a workbench that looks as if you're having a bad acid trip, and bad flickering that prevents you from moving the pointer icon anywhere much. The FAQ I looked up said that Green indicates Chip Ram.

This morning, I switched the socketed DIP ram from my spare A3k and removed the new Zip chips (just in case they were the problem), but still looks horrible.

I don't know if its related, but, its not recognizing the external CD drive, even though I haven't changed anything.

Got any idea anyone?  :-?
Amiga 3000D UP and running! Hear that clicking. 8)
Amiga 3000D & 4000D in storage sadly.
 

Offline Lemonty

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Re: Dying A3000D?
« Reply #1 on: May 03, 2009, 09:33:00 PM »
Maybe some other component may have become unstuck while you were placing the zips. Try reseating them?
Take anti-static measures first of course.
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Offline amigean

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Re: Dying A3000D?
« Reply #2 on: May 03, 2009, 11:16:17 PM »
I have only just been reading this (following a link to another user's signature):

http://amiga.erkan.se/index.php/my-broken-amiga-3000-is-fixed-and-fully-working/

could this be the cause of your trouble? It could be that changing the memory might have precipitated the problem elsewhere (just a thought!), or then again maybe not...
 

Offline AmidufferTopic starter

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Re: Dying A3000D?
« Reply #3 on: May 03, 2009, 11:18:04 PM »
Yes, as soon as I got the Zip chips in, I made sure that all other socketed chips were pushed down on just in case.  :-(
Amiga 3000D UP and running! Hear that clicking. 8)
Amiga 3000D & 4000D in storage sadly.
 

Offline AmidufferTopic starter

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Re: Dying A3000D?
« Reply #4 on: May 04, 2009, 02:38:49 AM »
Hmm. Sounds exactly like his problem. Think I'll transfer the U202 & U203 chips from the spare A3000 and see.
Amiga 3000D UP and running! Hear that clicking. 8)
Amiga 3000D & 4000D in storage sadly.
 

Offline Castellen

Re: Dying A3000D?
« Reply #5 on: May 04, 2009, 06:53:56 AM »
I've written more information on the same subject here if that helps.
 

Offline AmidufferTopic starter

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Re: Dying A3000D?
« Reply #6 on: May 04, 2009, 07:36:14 AM »
Thanks Anthony. Forgot about your excellent tech website.

I changed both U202 & U203 from the spare A3k and there wasn't any change.  :-(

Wanting to see what would happen. I transfered all my Zip ram and the 3.1 Roms to the spare A3k and just moved the harddrive/floppy/PSU tray over. However, it won't boot. The power LED just keeps blinking.

Another idea, would a failing 3640 be the cause perhaps? I'm not certain, but I think one of the capacitors has blown. There's some crap on the pins of the chip next to it, but you can't really tell if the capacitor is bad. I think its one of the few that had the two that were placed on wrong. It looks different than the 3640 in my A4000.
Amiga 3000D UP and running! Hear that clicking. 8)
Amiga 3000D & 4000D in storage sadly.
 

Offline countzero

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Re: Dying A3000D?
« Reply #7 on: May 04, 2009, 07:55:10 AM »
of course it can be. switch to on board 030 to be sure. don't forget to change clk jumper settings.
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Offline AmidufferTopic starter

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Re: Dying A3000D?
« Reply #8 on: May 06, 2009, 07:18:04 AM »
Everythings been moved to the spare, but its refusing to boot. Only get the black screen, & 1 blink on the power led. Can't see that referenced anywhere.
Amiga 3000D UP and running! Hear that clicking. 8)
Amiga 3000D & 4000D in storage sadly.
 

Offline terminator4

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Re: Dying A3000D?
« Reply #9 on: May 06, 2009, 08:28:37 AM »
This is why you should get the same type of RAM or similar.  Never mix values or different zip ram types.  
Make sure that zip are in their proper banks (its obvious but some people don't understand this still 19 years later).  
http://www.amiga.org/forums/showthread.php?t=40992
Did you check for that before installing them?  What do your ZIP rams say on them as far as "labels"?  Not all ZIP Rams are compatible with A3000.  

Bad or damaged zip rams may cause no boot on A3000.  And green color is it.  I'd try removing all (or one bank at a time) zips and booting off the internal cpu (68030).  Actually, i'd first try disconnecting the powersupply and connecting it back in.  Your A3000 can still boot with 0 memory.  Press down all chips.  Check crystal clock is ok.  Cleaning daughterboard slot perhaps for your 040 cpu?  If this won't work then...  Sigh, now only a qualified tech person might fix your A3000.  Still, it's kind of hard to kill any amiga.
 

Offline AmidufferTopic starter

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Re: Dying A3000D?
« Reply #10 on: May 06, 2009, 08:10:27 PM »
I got the Zips from Redrumola, and he vouched for them. Yes, I put them in proper order, and I did take them out and the problem remained.

Now that I've put drive tray in the spare A3k, does anyone know why it the screen stays black with just a blink on the power led?
Amiga 3000D UP and running! Hear that clicking. 8)
Amiga 3000D & 4000D in storage sadly.
 

Offline chiark

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Re: Dying A3000D?
« Reply #11 on: May 06, 2009, 08:56:29 PM »
3.1 ROMS + ZIP Ram = random crashes in my machine...

2.04ROMS+ZIP RAM = stable as a stable thing being very stable
2.04ROMS+ZIP RAM+softkicked 3.1 = stable...

Might be worth trying the old kickstart?
Celebrating 21... no, make that 27... years of Amiga use
 

Offline AmidufferTopic starter

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Re: Dying A3000D?
« Reply #12 on: May 07, 2009, 03:28:04 AM »
Sure?

I had 8 megs of Zip ram with 3.1 Roms before all this mess, and it was quite stable.
Amiga 3000D UP and running! Hear that clicking. 8)
Amiga 3000D & 4000D in storage sadly.
 

Offline AmidufferTopic starter

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Almost there!
« Reply #13 on: May 17, 2009, 09:29:01 PM »
Yay!

I've been trying different combinations of jumper settings and I'm at least getting into WB (somewhat). I took out the 3640, and changed the jumper which was for 1x4 chip ram and moving it to the other jumper seems to help (I think). The cybergraphic program is crashing before WB loads up, and it can't see the CD drive, which I think might be dying too.
Amiga 3000D UP and running! Hear that clicking. 8)
Amiga 3000D & 4000D in storage sadly.