A4000 gone dead - part three

[dvvrue95]

Hi there (again) folks,

ok so whislt I am awaiting that great Amigian in the sky to rustle me up a A4000 mb I thought I would do some more (limited) testing this time with the audio connectors plugged in as well as the video connector.

When I power on without any FD, HDD, daughterboard all that happens is either :-
(a) the power led flashes repeatedly in 5 or 6 cycles and there is a synchronised clicking from the output of the audio and flickering video from a a screen which is dimly grey, or
(b) as above but with intermittent yellow screens.

Oh by the way does anyone know if the A4000EC04 uses a socketed cpu?

many thanks, Ian
 

[dvvrue95]

Matt_H wrote:
From what I remember, the daughterboard absolutely must be installed for anything to work. Plug it and the floppy drive back in.
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Hi Matt,
tried that with just the  same results, but I also removed all the ram simms and did get a green screen - but I guess that figures since green screen is supposed to indicate a ram problem?  

thanks for feedback,
Ian.

[dvvrue95]

patrik wrote:

Try installing just the chipram simm.

Are all jumpers correct - was it a working A4000 that just stopped working?

Have you tried another processor card?

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Hi Patrik

I tried it with just chipram fitted and it was just the same i.e. flashing power led - clicking audio and maybe an occasional yellow screen.

I guess you missed my earlier threads :-
A4000 gone dead
and A4000 gone dead part 2
It was a working A4000 that just went dead, I was trying to install a replacement (bigger) second drive and having trouble with HD install so I was running Disc Salv which was very slow so I left it running overnight when I returned the A4000 was dead. I did manage to get the insert wb3.0 screen once by disconnecting hdd, fdd and doing a cold restart but not anymore.

thanks for your interest, Ian

[dvvrue95]

Hi Ron,

thanks for that idea, but already confirmed its not the psu, by measuring voltages ( seem my other threads for the mess I made of that first time around!) on mb power connector and even connecting a "borrowed" atx psu via a atx / A4000 power converter cable from Amigakit.

So that`s why I'm now looking for another mb or processor board.
Ian.

PS the A4000 did have two hd's and worked fine before I started down this route.