finally repaired my A2000.. :mickeymouse: it was a leaking battery.. sigh
linkyI even replaced ROM AND CPU socket, and that didn't help. all the time fault was in a SINGLE trace near the battery.
I would have checked it earlier, but I have replaced batt with lith_hack and cleaned everything and it worked (as it did before) for a while, then , when I started installing KS3.1 it simply died completely..