amiga 2000 suddenly dead, what happened?

[spirantho]

@Jaycebot

If you're in the UK I may be able to help as I do some repairs of this sort of thing (just resurrected a battery damaged 1500 a few weeks back).
As it's a company thing I would need to charge £50 though if I successfully fix it I'm afraid! PM me if you want me to have a crack at it.

[spirantho]

Green screen is a Chip RAM error, yes... but it doesn't mean there's anything wrong with the Chip RAM, it just means that the CPU can't talk to it properly. It could just mean Agnus needs reseating, or (more likely) a trace that you think is ok actually isn't.
How did you check the traces? Remember that just because a trace looks good doesn't mean it is - you need to check with a multimeter. Also remember that the pins of the CPU next to the battery are the data lines. That means they're connected to more than one thing (the kickstart chip and the rest of the board in the other direction).

[spirantho]

Curious...can these dead boards be fixed and sold again in eBay, thus constantly recycling Amiga motherboards or you think it should be thrown?

I hope nobody would ever throw away a board like this! The parts (from even lowly RAM chips to the custom chips) can be used to rejuvenate other motherboards - Even a trashed board will have a mine of useful ICs on it.