Geeetech A10 Pro doesn't start up

[FirojB1]

Hello,
my Geeetech A10 Pro doesn't start up, the display is staying "black" and nothing happens...
I opened the cover and just the red led in the upper left of the board is glowing https://19216801.onl/ https://routerlogin.uno/ (red) at the moment.
Everything is connected correct and no wrong polarity.
Hope someone can help me with that issue.

[Admin]

Hello, there may be a problem with your screen. You can try to control the printer with your computer to see if you can print. If it is a problem with the screen, please contact geeetech official through ticket.