Restoration of Amiga prototypes

Chucky · 07 August 2020, 08:28

Hi.

putting this same question in several sites.

I got some Amiga prototypes here. Amiga 4000Rev1 (also called Amiga 3400 boards), Amiga 1200 prototypes etc.

unfortunally none is working (drawback with prototypes is. WAS it ever working?

)

they have capacitorleakages etc etc. so this will be a long restore-project.
but. how should I do? either just clean it up and try to troubleshoot it.
OR as there is some corroded components etc. remove the components. clean the pcb in IPA and then slowly build it up with new logic and passives (using same chipset that was on ofcourse) by doing this. I can also clean up under all components etc.

I want input. what do you think would be the best restorationmethod of those rare boards?

Ordyne · 07 August 2020, 08:38

Please do not strip and renew, it would be better to replace leaking capacitors to stop further damage and keep them as display pieces rather than shotgun them. I have 2 rev1 a4000 (a3400) one I changed one logic chip to get it going, it took a lot longer to get to where where I thought I had reasonably done all options to pinpoint the problem before I changed it, if it was a regular a4000 pcb I would have tried replacing the suspect IC a lot sooner as it doesn’t have the same historical significance IMO.

Chucky · 07 August 2020, 08:41

this is why I ask..

want to have peoples opinions and will do what majority thinks

Matt_H · 07 August 2020, 19:22

At the very least we need photographs!

Chucky · 07 August 2020, 23:46

Pictures will come.. and you tube..

I think the solution will be: I will remove the ICs. clean up under. clean ICs, test them in a tester, and if working put the same chip in.
someline like a vintage car. when you remove parts, clean and put back

Chucky · 07 August 2020, 23:47

Overmann · 08 August 2020, 00:18

Send them to hese in finland. There is nothing he can't fix! If it ever worked he can get it working again

Chucky · 08 August 2020, 00:18

heheh. nahh i will do it..
but if this damn virusshit would not happen I WOULD be in finland not at assembly showing em off.. BAH!

lmimmfn · 08 August 2020, 00:34

I wouldnt change anything on them or try and get them working(unless its minor work without having to replace anything)
If i went to a computer museum i would prefer to see Amiga prototypes as is regardless of working or not.

Chucky · 08 August 2020, 00:37

I COULD display them "as is" but would be nice if I got them in their former glory..

I will howeer try to not replace with modern parts. if a chip is neded to be replaced I will try toget hold of a chip from that timeperiod.

07 August 2020, 08:28	#1
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	Restoration of Amiga prototypes Hi. putting this same question in several sites. I got some Amiga prototypes here. Amiga 4000Rev1 (also called Amiga 3400 boards), Amiga 1200 prototypes etc. unfortunally none is working (drawback with prototypes is. WAS it ever working? ) they have capacitorleakages etc etc. so this will be a long restore-project. but. how should I do? either just clean it up and try to troubleshoot it. OR as there is some corroded components etc. remove the components. clean the pcb in IPA and then slowly build it up with new logic and passives (using same chipset that was on ofcourse) by doing this. I can also clean up under all components etc. I want input. what do you think would be the best restorationmethod of those rare boards?

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07 August 2020, 08:38	#2
Ordyne Registered User Join Date: Jun 2014 Location: Newark Posts: 5	Please do not strip and renew, it would be better to replace leaking capacitors to stop further damage and keep them as display pieces rather than shotgun them. I have 2 rev1 a4000 (a3400) one I changed one logic chip to get it going, it took a lot longer to get to where where I thought I had reasonably done all options to pinpoint the problem before I changed it, if it was a regular a4000 pcb I would have tried replacing the suspect IC a lot sooner as it doesn’t have the same historical significance IMO.

07 August 2020, 08:41	#3
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	this is why I ask.. want to have peoples opinions and will do what majority thinks

07 August 2020, 19:22	#4
Matt_H Registered User Join Date: Jul 2008 Location: Boston, MA Posts: 945	At the very least we need photographs!

07 August 2020, 23:46	#5
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	Pictures will come.. and you tube.. I think the solution will be: I will remove the ICs. clean up under. clean ICs, test them in a tester, and if working put the same chip in. someline like a vintage car. when you remove parts, clean and put back

07 August 2020, 23:47	#6
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210

08 August 2020, 00:18	#7
Overmann Registered User Join Date: May 2014 Location: Norway Posts: 379	Send them to hese in finland. There is nothing he can't fix! If it ever worked he can get it working again

08 August 2020, 00:34	#9
lmimmfn Registered User Join Date: May 2018 Location: Ireland Posts: 674	I wouldnt change anything on them or try and get them working(unless its minor work without having to replace anything) If i went to a computer museum i would prefer to see Amiga prototypes as is regardless of working or not.

08 August 2020, 00:37	#10
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	I COULD display them "as is" but would be nice if I got them in their former glory.. I will howeer try to not replace with modern parts. if a chip is neded to be replaced I will try toget hold of a chip from that timeperiod.

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