HDD recording issue on Panasonic DMR-EX75EB?

Hi

I have a panasonic DVD Recorder, DMR-EX75EB, and recently all recordings to the HDD drive are faulty. On playback, every recoding, since the issue started, have pauses, i.e. the disk appear to stick. Recordings that were taken before the issue work fine.

Today, I formatted the HDD drive in the hope that this would fix the problem, but no luck.

Any assistance on what else I can try would be greatly appreciated.