Thinkpad p50 with Ubuntu operating system stops charging, what can it be and what can I do?

My laptop hasn't been charging since last night, before that I never had any problems with it.

The laptop is still working, but the light on the back of the laptop does not come on when I plug in the power adapter and the top right does not show that it is being charged. I tried using other chargers, but they worked just as well (maybe that's because the others were too weak)

It may simply be that the mainboard has given up the ghost. The P50 is already a few years old and something like that can happen. Was there any incident in the house? Power failure or overvoltage or something? And was the battery charged when he stopped?

Thanks for the tip