Severe crackling during recording - Yamaha POCKETRAK 2G Pocket Stereo Recorder

.i assume the crackle you'r getting it when you are using the built in mics? i;m still in the process of troubleshooting my 2g but this is what I've got so far....the line in dosn't suffer from the crackel, so it cracked here open , didn't see any obvious problems on the board so i disconnected the black wire from one of the built in mics and this is what i found: odd and strange..... the crackle went away but i haven't tested that in depth yet 2. when recording it looked like i was getting some thing on both tracks odd.. thought 1 channel would be dead. anyway i got tired and put it away and haven't gotten back to it yet but about time i did so hopefully this weekend . hopefully i'll have some more useful info.. now a note on my take so fare as to where the crackle is coming from , bear in mind i've only had about 3 hours with the 2g so far so still getting acquainted. i'm getting the feeling it might be associated with the ACG or the record level auto calibration or clipping etc.. because i noticed that it seems like its starting ,checking levels, and setting things the a spike and it resets and starts over again. how ever the pattern is to random from what I've seen so far to to be anything concrete