This error appears on every print

[T_M]

Looks like the same error I was getting. See this thread

A1 heatbed temp error

Fantastic! To be honest, unless you want to be messing around with the heat bed and sensors, I think that is the best resolution. Not the sort of thing you want to have to be doing after so few hours on the clock. Fingers crossed round two goes better

Go to the control menu and manually enter a bed temperature like 65C and watch the display to see if it starts to go crazy like mine would. I have a video in that thread I linked.