ABB robot - problem of axes calibration lost after booting

[SHAY 0]

Hi everyone 

Can anyone help me with this problem, please?

I have an ABB robot whose axis are calibrated, lately, after a power shut down, I rebooted the robot and I found that all 6 axes have lost their calibration. I thought it was a battery problem so  I changed it with a new one. And I recalibrated the 6 axes.

I shut down the robot and this time I found only one axis that lost its calibration, the other ones are ok.

I don't know what to do, have you any idea about this problem? 

thank you in advance 

[pcmccartney1 138]

Check the battery

Check the cabling for the signals board to the robot base

Lastly replace the signals board.