Hi, I am A. Stevens here to help with your question!
Hi Terry - thanks for using Just Answer.
Is the light red?
Has it always been flashing or just started to?
Typically flashing red just means the HDD is being accessed...recording or playback
Not necessarily that it is full or broken
Yes it is red and only recently started flashing accompanied sometimes by a "bleeping" noise which eventually stops but leaves the flashing light.
Thanks for that info.
Yes most likely the HD has failed.
You can replace it with another.
Do you have the manual for the unit? There is a diagram in there on how to do so. Otherwise I can also send you a digital copy.