no power to motherboard

[rvo_nl]

Hi guys, could use some help. Foe years I've had a nice working a1200t. With a lot of expansions, all working in harmony. But for some reason, my motherboard stopped working. After finally finding a new (recapped!) one, I was installing my expansions one by one. This all went perfectly fine. Until I plugged in my PPC + Bvision and hit the power button.

Nothing. Just the HD spinning up. Basically no power to the motherboard. No keyboard led. No output to my television (was still using RF output at this point). Removed PPC, and all expansions one by one. Same result.

What is wrong here? tried with another PSU, same result. It is driving me mad. I've waited for months and now still have no working Amiga I'm an electronics n00b, can not do any measurement. How can I proceed? Does anyone have a similar experience? Name anything you can think of, because this one is not so straight forward I'm afraid.

[rvo_nl]

Thanks all for replying.

I've tried without IDE and floppy, yes. There is not much more I can disconnect. Here's a pic of installation without ppc/bvision and prelude:



I have a multimeter. But also no idea what I'm doing. The two dont match. And I dont think Googling around is going to change that.

[rvo_nl]

Okay, what about that Ratte monitor switcher that I have attached top-left (not in the pic). Could that cause this issue? It's a very fragile thing and now that it's connected I'd rather leave it in. It breaks easily.

[rvo_nl]

good thinking, but Im quite convinced the ppc had nothing to do with the broken old motherboard. since it broke down when the ppc wasnt connected. will do some testing tonight.

[rvo_nl]

so uhm..



it's alive! again!

your guess is as good as mine. took out the motherboard. powered on. worked first time. curse you, old computers!

seriously, I think I know what needs replacing:



right now I'm very happy its still working. and even more happy that my ppc is not faulty

[rvo_nl]

@mechy indeed, I havent ruled that out yet. I also had lots of troubles getting output from the indivision until I placed it inside the tower. something's still not quite right. but I need that cable anyway, its falling apart.

@danbeaver yeah they dont have the a1200 cable listed on their website at amigakit, so had to use this one. good thinking though, thanks

[rvo_nl]

Thanks for the encouragement. you can be sure I am not giving up. I know for sure I can get this cable fixed and hopefully that will solve my issues. Will update this thread when I know more.