No LCD when turning on printer

[x306xcptnkirk]

I get no lcd when turning on my printer. It only turns on when I connect it to a computer. Why is this?

[zhangxueyou]

What is your printer type? What is the mainboard type?
How about swapping the connection of 2 cables behind LCD screen?

[x306xcptnkirk]

Sorry about that Gt2560, pro-c model, I put new printer drivers in the board. It successfully auto zeroed and I was preheating the bed to check it, turned off the printer afterwards and it would not turn back on unless I plugged it into computer. It previously turned on and was controlled by the lcd.

[zhangxueyou]

Is the "printer driver" you call stepper driver? If it is, is it as same as the older one?

[x306xcptnkirk]

Nope I put a brand new set of drivers in.

[zhangxueyou]

I still don't understand. Is it Marlin firmware?

[x306xcptnkirk]

Sorry about that. Yes brand new stepper drivers. I have not played around with the firmware at all.

[x306xcptnkirk]

Sorry yes they are bew stepper drivers drv8825

[zhangxueyou]

How did you plug the stepper driver?

[x306xcptnkirk]

The correct way.