newbie needs help with an a10 Geeetech not turning on properly

[bearbles2]

tl;dr my printer's power supply on-off switch will light up, but nothing else seems to turn on. I've finally finished putting together my 2019 Geeetech a10 3D printer, but it doesn't want to work with me. I turned it on for the first time today, and although the on-off switch lit up on the PSU, nothing else happened. I checked the connection to the LCD display as well as the other input connections all around the printer, and nothing seems wrong. I tried looking for some pointers online, but the instructions for this printer aren't the greatest, and I haven't found anything to work thus far. Power cable is connected; LCD display with SD card is connected; extruder, filament detector, stepper motor, and endstop are connected; filament is in place; the power cord is in. Any ideas of what's going on here? Anything I can try? Any common newbie mistakes I'm completely unaware that I've just made? Thanks a ton for any help.

[William]

Hello, you can check whether 4 lights are on when the motherboard is turned on, and 5 lights are on when heating. The motherboard may be damaged, you can contact geeetech to replace the motherboard.