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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: knimp on January 23, 2019, 10:40:58 PM

Title: Indivision ECS V1 random lines mystery "fix"?
Post by: knimp on January 23, 2019, 10:40:58 PM

Hi Everyone,

A new post about an old issue.

I have an Indivision ECS V1 installed on an A500 rev8A.1 which suffers from the 'random horizontal lines' issue.
See https://forum.amiga.org/index.php?topic=61869

The problem dates back to 2012 (!!) I never could resolve this (vendor support stopped answering emails and I got discouraged).
After seeing too much of these random lines, I feel ready for some soldering! (and if it fails I'll just take some more drastic action involving a hammer ;D).

My Indivision ECS is apparently missing a 'fix'. I was told back then by support that <quote>a ferrite bead needs to be replaced with a 10 ohm resistor</quote>. But which one? This remained a mystery.

It would be absolutely great if someone could post a picture of this infamous 'fix'. It is most likely under the Denise chip as I was asked by support to send a picture without it initially. I looked at every possible image of ECS Indivision on Google but could not see any one involving this second fix -- the first one I have already (see towards the end of http://www.amibay.com/showthread.php?31249-2-months-delay-for-DOA-replacement-(resolved)/page5 )

Thanks!!!

Title: Re: Indivision ECS V1 random lines mystery "fix"?
Post by: brostenen on January 24, 2019, 11:20:38 PM

I saw something about a fix on the individual computers forum the other day. This is the only place that I have come across something that sounds a bit like your issue. Might be the same things, yet I really do not know. Anyway... Have a look, it might be what you are looking for.

https://forum.icomp.de/index.php?thread/96-problems-with-display-and-indivision-ecs/ (https://forum.icomp.de/index.php?thread/96-problems-with-display-and-indivision-ecs/)

Title: Re: Indivision ECS V1 random lines mystery "fix"?
Post by: knimp on January 25, 2019, 11:02:21 PM

Thanks! I had not seen that one yet! Mine has a slightly different fix on the leftmost part, and it seems there is something different as well in the middle (for some reason cannot post a picture). Interesting.

Meanwhile I just got hold of another PSU (which happens to be of the 'heavy' / transformer type), so I'll give it a try as well.