Full graphic lcd problems

Foxtech 2016-12-30 01:04:23 UTC #1

I've just finished my 2020 i3 build and I have tried quite a few things to get it to work.

It lights up but won't show anything, and I've tried to adjust the configuration file to include it, as well as including the u8glib.h file.

I don't know if they go bad sometime, but it's really frustrating that this has happened.

Any help would be appreciated.

csorrows 2016-12-30 01:20:19 UTC #2

Try flipping the plugs over. You may have to file the key down to do this.

Foxtech 2016-12-30 01:25:18 UTC #3

Which ones do you have to flip..?

csorrows 2016-12-30 01:28:07 UTC #4

Pick an end. Just flip the end around and plug it in upside-down if that makes sense. Do it with both cables. I'm referring to the 2 ribbon cables going to the LCD. They are wired so nothing will burn if you plug it in backward. Usually the LCD just lights up. It's worth a try. Some of them work backward for some reason. Chinese parts.

Foxtech 2016-12-30 01:31:37 UTC #5

It just blinks and beeps.

csorrows 2016-12-30 01:59:21 UTC #6

Did you use the firmware for the full graphic?

Foxtech 2016-12-30 02:00:27 UTC #7

i am trying to download to arduino for the third time the 'full graphic lcd" firmware.

csorrows 2016-12-30 02:01:24 UTC #8

That should include everything needed. I think there is a contrast adjustment on the LCD?

Foxtech 2016-12-30 02:02:31 UTC #9

tried that as well....only makes the little squares darker.

csorrows 2016-12-30 02:03:59 UTC #10

Strange. Try putting the ribbons back normal direction and swap them? Rule out a bad ribbon.

If this does not work I would recommend contacting FT. You may have either a bad MKS board or LCD.

Foxtech 2016-12-30 02:09:02 UTC #11

tried it..doesn't work.

sent a help request directly to them....doesn't make a guy very happy on his first printer build.

csorrows 2016-12-30 02:11:35 UTC #12

It might be something I'm not thinking of. We do sometimes get bad parts from these Chinese suppliers though.

Foxtech 2016-12-30 02:38:49 UTC #13

i really hope that's all it is.!

Foxtech 2016-12-30 17:35:28 UTC #14

is it possible for my lcd screen, but not the controller board part on the full graphic smart controller to be bad...?? I seemed to have figured out by blind trial and error that I can home and heat the bed without being able to see anything...!! Weird...!!!

do you think that folgertech will replace things for me..? I have sent them a message but their tech people haven't gotten back to me.

thanks again