A3000T Issues

[robbhar]

I hope this is the correct forum area for these questions. A have two complete A3000T, one with a A3640 and Sonnet speed doubler. After pulling them out of storage for a couple of years I am trying to got them up and running.
The aforementioned A3000T was giving me a black screen on boot up. I have tried the following to no avail:

• Replacing the PSU with the other A3000T PSU
• replacing the CIAs with known good CIAs
• re-seating the A3640 card
• Installing 3.1.4 Roms

The power light does come on and the Gotek hooked up to it powers up. The fan on the sonnet board spins up. Changed video output to RGB and turned off de-interlacer.


My next thoughts are to:

• remove the A3640 and set jumpers to boot from the Mobo
• ?

Any ideas from anyone for next steps?
Rob

[hyami]

Hi Rob,
first the most obvious question; have you checked for battery leakage?

[nexus]

if you havent taken the original batteries off then you may have a ton of issues to fix
and could be out of your skill level in repairing like traces ate away and pins on IC's etc etc
battery is next to many critical components
depending on when they leaked and how it was stored moved around etc determines how bad the acid spread even under the board
so take that batt off neutralize the acid with vinegar etc then inspect traces and pins

[robbhar]

Sorry, I forgot to mention. Both ends of the battery are clean and free of gunk. I have both a replacement barrel and a coin battery that I will try as well.

[Franchute13]

Hi.
Welcome to the forum.
Personally, what I would do would be:
1) Put the Amiga 3000T as a factory, without expansion with nothing. Check the jumpers to ensure that the configuration is the factory.
2) Remove all the chips in sockets and clean the sockets and chips.
3) Test, see if it blinks the lights of the keyboard and the power.

Greetings and send photos!

[robbhar]

Good first steps for troubleshooting. I think my next steps are as follows:
* "Put the Amiga 3000T as a factory, without expansion with nothing. Check the jumpers to ensure that the configuration is the factory."
* "Remove all the chips in sockets and clean the sockets and chips."
* Take both boards out and use a magnifying glass on the batteries, remove, clean and replace both
* Find the other A3640 and try that
Rom question:
Which one is hi and lo?
Thank you everyone for piping up!
Rob

[Franchute13]

Originally Posted by robbhar

Good first steps for troubleshooting. I think my next steps are as follows:
* "Put the Amiga 3000T as a factory, without expansion with nothing. Check the jumpers to ensure that the configuration is the factory."
* "Remove all the chips in sockets and clean the sockets and chips."
* Take both boards out and use a magnifying glass on the batteries, remove, clean and replace both
* Find the other A3640 and try that
Rom question:
Which one is hi and lo?
Thank you everyone for piping up!
Rob

Before any change, take pictures of how it is armed / configured / jumpers status. Take lots of pictures if you have to go back in the configuration.
Regards!

[robbhar]

Great idea, will update as to how it works.