Problem with the heating of the heated bed

Snapmaker 2.0 (3-in-1)
1

The heated bed of my A350 does not heat up anymore, what could be the cause?

2

First thing to do is check the cable, particularly where it connects to the bed itself. There have been some instances of cables coming apart or even shorting out right at the connection due to mechanical wear—see Snapmaker 2 heated bed cable hazard