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51
Amiga Hardware Issues and discussion / Re: A600 glitches after recap
« Last post by Jacksoft on December 19, 2025, 02:34:08 PM »
Hi! Thanks for the fast reply.
About the ceramic caps I noticed that one under the board was very hot. I removed and tested it in Ohm and returned me about 33Ohm. But one ceramic cap in short or nearly can happens. The strange fact is that other two caps on that line where also like this (60ohm, 100ohm, etc). Also the one on the Paula alimentation (after the big 1R resistor) had trouble so he messed with the tension partitor for the 2.4V.
I removed them all and tested and about 4-5 of them where faulty (this is REALLY strange).

I'll check where you suggested and report you asap. Thanks!
52
New User Introductions / Re: Hi all from Italy!
« Last post by F0LLETT on December 19, 2025, 09:05:16 AM »
Hi,

Welcome.
53
Amiga Hardware Issues and discussion / Re: A600 glitches after recap
« Last post by F0LLETT on December 19, 2025, 09:03:00 AM »
How do you know, the ceramics were nearly short?
Did you remove them and read them, as in circuit they may well have some signs of resistance. Unless they are dead short, they are proberly fine.
Only way to check 100% is to remove them and test them.
I certainly would not be messing with paula. Its a video fault, so if leakage, check DAC, BT101 and Denise areas.
Bypassing things is not a great idea, did you actually solve that issue, as you do not say exactly.

PCB Explorer is anawesome tool, to help see where damaged track goes.
http://amigapcb.org/
54
Amiga Hardware Issues and discussion / A600 glitches after recap
« Last post by Jacksoft on December 19, 2025, 12:47:34 AM »
Hi all,
I encountered a strange issue during/after a recap on A600 rev. 1.5.
I've not repaired so many Amigas but fixed some 500's with minor problems.
This machine had floppy drive issue and no video on composite.
No video was caused by Z222 and I bypassed it just to make sure it works, floppy drive was recapped and now looks working' (not fully tested yet), so there's the main A600 plague, bad caps and some corroded traces.
Initially the machine worked ok, after I replaced all the capacitors (found about 4-5 ceramic caps on the 5V line in nearly short too and replaced them!) and removed Paula to check traces under the chip (some of them were "blacky") I putted all back and powered on the A600 with some ugly glitches on the half-down screen like in attached pictures.
For older machines like A500/500+ I used the Test Disk floppy but in this case, after loading the Test Disk, I could only see garbages on the screen, so I bought a DiagROM and did some tests. Most of all seems working ok, except option 1, 2, 3 in Graphics tests: it causes glitches, empty screen or no video at all. RAM, CIA, IRQ are ok, sound tests are ok.
I also tried disabling and removing Paula again (thinking about some wrong soldering or other) but nothing changed.

I've seen around that this kind of problems is caused by a bad Agnus, but I don't understand how it could be correlated the work I did.
Before starting messing anymore around and buying replacements there is some others checks and tests I can do?

Thanks in advance.
55
New User Introductions / Hi all from Italy!
« Last post by Jacksoft on December 19, 2025, 12:17:35 AM »
Hi all!
I'm new here and nearly about Amiga stuff. I'm searching overall infos on hardware related issues and how Amiga Computers works to better understand them!
56
General chat about Amiga topics / Re: Amiga still surprises me! Skypix - did anyone use it?
« Last post by Metalguy66 on December 18, 2025, 10:14:22 PM »
Hey Coyote!

ACME was the best board in Houston, and one of the best AMIGA boards in the world..

Back in the 90s, If you had to choose between a dial-up internet connection (by the hour back in those days) or an elite-user subscription to ACME, you chose ACME hands down.

Everyone, Drew also ran the local AMIGA User group in Clear Lake City (just south of Houston). He's a Houston area Amiga legend!


 
57
Amiga Hardware Issues and discussion / Re: fastata and 4gb devices?
« Last post by Boing-ball on December 18, 2025, 06:08:16 PM »
Quote from: lorddef on December 18, 2025, 10:52:11 AM
Good call, I will check the preferences.

It's the oldest version, a MK-I EIDIE as I recall, Yes I agree, they can be a PITA, however going from it not working when I first resurrected the Amiga to now the speedup is impressive, even if it does hog the CPU.

I do have a blizzard scsi too, just a shame I've nothing to plug into it at the moment.

Yeah, MK 1 adapter software is very problematic. Have read the split option in the prefs won’t save. You have to play with use and save.

Personally would go Blizz SCSI as it has the advantages of DMA and less CPU overhead. But your choice.
58
Amiga Software Issues and Discussion / Help Pricing This Game - Supaplex - Dream Factory
« Last post by bermuda on December 18, 2025, 02:25:02 PM »
Hi everyone. Can somone help me pricing this Amiga game?
Supaplex by Dream Factory
Pal Version

Can find only one sold on ebay
https://www.ebay.co.uk/itm/167879354633

Thx
59
Amiga Hardware Issues and discussion / Re: fastata and 4gb devices?
« Last post by lorddef on December 18, 2025, 10:52:11 AM »
Good call, I will check the preferences.

It's the oldest version, a MK-I EIDIE as I recall, Yes I agree, they can be a PITA, however going from it not working when I first resurrected the Amiga to now the speedup is impressive, even if it does hog the CPU.

I do have a blizzard scsi too, just a shame I've nothing to plug into it at the moment.
60
General chat about Amiga topics / Re: Just saying hi.
« Last post by AndyFC on December 18, 2025, 10:40:05 AM »
Hi Dew,
Welcome to Amiga.org and thanks for posting and sharing your background. Hopefully there are some members of this forum who were involved with your previous work.

Just on your A4000, check the battery hasn't leaked.
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