UR10 - Startup Issues

Today I tried to get an UR10 up and running. The problem is that when I press the power button, the display lights up with the logo but goes dark again after about 10 seconds. The same thing happens with the power button.
The robot is connected to the control box.

is it an old robot (cb2 or cb3)? or E-series?

Sounds like a defective motherboard / lost BIOS

can be fixed by replacing the motherboard, which is fairly easy done and not too expensive either.