K8400 blinking display

I finished assempling the printer on to turning it on,i follow the instuctions power it on and my display blinks,
Its on for 1-2 seconds then it turns of for 1-2 seconds and keeps repeating this,note text isnt displayed also
But the red leds from the endswitches and a green led on the mainboard are on.i already checked al connections.

Are you sure that the reset button on the LCD isn’t activated?
If you installed the LCD not 100% correctly it will get stuck between the case and the PCB…

Dylan

im not sure i may have to check that

i found the issue a bad connection between the display pcb and the sd card pcb the spacers where to big between them note to the manurfacturer make those spacers smaller