Kawai Synthesizers

hi everyone, new member :)

i just picked up a k1rII, which is in pristine condition. however its sound output
is a mess: no noise on outputs but i get crackling and i'm sure these aren't
how the waveforms are supposed to playback.
my patches from a memory card are a mess too.

is this a very sinister fault with CPU or DAC, or just a battery going flat?
if it's the 'bad' could it be caused by knock in transit? it came with original psu,
but that's no guarantee it hasn't been plugged into something else.

any ideas appreciated, thanks.

the 2nd issue is: i thought i was buying a regular K1r, not a mkII.
is this model the same bit-rate as the mark1? i read somewhere
that they went to 16bit, but wasn't that the K4?
(also thought i'd find fx on this one, but apparently that was only the kbd
version?)