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dirkies · 13 July 2014, 19:17

For the first time in about 10 years I fired up my A4000 desktop rev D (was always stored in a dry an ambient room) but unsurprisingly it did not get far. It does power up, HDD spins up, DVD, leds come on etc.
But the PIV outputs just a black screen (so LCD monitor gets a signal) and the power led cycles 1 bright time and then 6 blinks in an endless loop.

So I decided to take the whole thing apart (it is pretty pimped up!) and see what can be noticed.

Some things not looking right:

Power supply caps (the black ones), or is that glue?!:
https://plus.google.com/u/0/photos/1...44341231334552

Capacitor C200:
https://plus.google.com/u/0/photos/1...44341231334552

Capacitors C404 and/or C443 and the resulting (?) "green" legs of U402:
https://plus.google.com/u/0/photos/1...44341231334552

another shot of same situation:
https://plus.google.com/u/0/photos/1...44341231334552

All the rest looks OK. Underside of PCB also looks pristine everywhere.

So could this capacitor crap be lethal to the board? The machine normally has a Cyberstorm MK2 060 with SCSI2,146MB RAM + PicassoIV, Toccata, Maestro, USB and Ethernet card, and 2xHDD floppies, SCSI DVD and HDD.

As I said, it has been a while, but last time it worked fine using OS 3.9 networked etc. Battery was already removed before the A4000 was stored 10 years ago, so no leakage whatsoever ever occured.

And my next question will then be, where can I repair this if it can be? Amigakit (recap)? Or does it require more advanced repair? What is U402 and does it need replacing?

I will not reassemble it all just to see if it now works, as I think these capacitors were naughty over the past few years.

13 July 2014, 19:17	#1
dirkies Zone Friend Join Date: Aug 2002 Location: Belgium Age: 51 Posts: 1,296	is my A4000 dead? For the first time in about 10 years I fired up my A4000 desktop rev D (was always stored in a dry an ambient room) but unsurprisingly it did not get far. It does power up, HDD spins up, DVD, leds come on etc. But the PIV outputs just a black screen (so LCD monitor gets a signal) and the power led cycles 1 bright time and then 6 blinks in an endless loop. So I decided to take the whole thing apart (it is pretty pimped up!) and see what can be noticed. Some things not looking right: Power supply caps (the black ones), or is that glue?!: https://plus.google.com/u/0/photos/1...44341231334552 Capacitor C200: https://plus.google.com/u/0/photos/1...44341231334552 Capacitors C404 and/or C443 and the resulting (?) "green" legs of U402: https://plus.google.com/u/0/photos/1...44341231334552 another shot of same situation: https://plus.google.com/u/0/photos/1...44341231334552 All the rest looks OK. Underside of PCB also looks pristine everywhere. So could this capacitor crap be lethal to the board? The machine normally has a Cyberstorm MK2 060 with SCSI2,146MB RAM + PicassoIV, Toccata, Maestro, USB and Ethernet card, and 2xHDD floppies, SCSI DVD and HDD. As I said, it has been a while, but last time it worked fine using OS 3.9 networked etc. Battery was already removed before the A4000 was stored 10 years ago, so no leakage whatsoever ever occured. And my next question will then be, where can I repair this if it can be? Amigakit (recap)? Or does it require more advanced repair? What is U402 and does it need replacing? I will not reassemble it all just to see if it now works, as I think these capacitors were naughty over the past few years.