Amiga1200 and BLIZZARD 123050mhz broker!? Help

[Boing-ball]

Yes! It doesn't start without BLIZZARD.... but I've described how the A1200 behaves without BLIZZARD 3. I wanted some information to understand what it could depend on and what the problem could be.

Without witnessing the magic smoke (Will be a quick white smoke). Then it could be anything that’s gone wrong. Possibly one of the Capictors? Have a look around for any burn damage. Apart from that couldn’t say.
I would purchase a new Blizz 1230 mark IV. It’s better than the MK3. Had both and the very rare SCSI addon for the MK3 was not very good. The ScSI MKIV for the MKIV 1230 was very good 👍🏻

[Boing-ball]

I own a BLIZZARD 123050MHZ IV non-SCSI. There are no signs of burning and no integrated circuits get hot. The Blizzard costs €400, buying it again is not an acceptable solution; I would like to repair both.

So to do that. You will need some sort of Electronics knowledge. An Oscilloscope and Multimetre to check circuitry.
Or send it off to someone who maybe prepared to look and possibly repair this.

Good Luck 👍🏻

[Boing-ball]

Highly doubt it will be because of a cap. A1200 can run with no SMD (except 47mf power ones) caps.
If it were a cap, it would have popped. You know when one of them goes pop, white smoke, bad smell and top will be missing or loose.

I would say, remove board from everything and have a really good look around the board. As yellow screen is CPU exception.
Check entire board (forget about Blizzard for now), there has to be something burnt up, if you smelt it. As BB already said, you may have missed smoke.

Could also be PSU, you got another to test, with just the A1200 mainboard (no Blizzard).

Is the 030 CPU socketed? I know most are. Have you tried removing this and reseating? Does the card also come with the optional FPU? Try removing this. Have had faulty FPU chips before now stopping systems from working.

For anything like SMD, the. It’s a case of probing and possibly desoldering and removal.

All the best.