User:
Our GSK980MDa control shows blue screen, all the indicating lights on the operation panels are on, power supply check: 5v 5.2v, -12V -11.9V,+12v +11.9v，+24v +24.9v,it seems the 24V is a little higher, and we could hear some noise from the power supply box, what is the problem?

CNCmakers Support:
According to your description, the I/O interface could have broken.