Strange flashing of LCD

[Myll_Barka]

Hello, my printer didnt print anything yet, i just tried to calibrate it.
The green light of the PSU doesnt work anymore and nothing comes on LCD screen.

However, when i even unplug the power cables, when i move the x or y axis by hand, and i do it fast enough, the lcd flashed. Is this related to some shortcircuit somewhere or static electricity?

[_kaktus_]

Hi

Hello, my printer didnt print anything yet, i just tried to calibrate it.
The green light of the PSU doesnt work anymore and nothing comes on LCD screen.
...

You had bad luck.
Contact your dealer and tell them that your main power supply has broken down. Specify the printer model you have.

You can also check the connections on the mains side and the fuse in your home.

...
However, when i even unplug the power cables, when i move the x or y axis by hand, and i do it fast enough, the lcd flashed. Is this related to some shortcircuit somewhere or static electricity?

Don't do this any more - you can burn the electronics.
The motors work like generators and there is a back-up voltage.