Geeetech

Hello,

has been a pleasure to help

Hello again, Yes, for the LCD12864 from bigtree-tech the connectors should have been mounted 180° turned, but here I have a modification. All you have to do is just to turn the cable connectors 180°. Still, please do the checks with a multi meter before retrying, I take no responsibility if it is no...

PS: rmrodriges ... this is also appearently your Problem with the Display as well, please check it yourself before modifying it with your multimeter...
Hopefully this helps you!

Hello Mark, got the Problem fixed... All others, be careful with the LCD12864 from bigtree-tech.com ! This display has 180° rotated EXP1 & EXP2 connectors! This way, the buzzer gets connected to VCC (5V) and this causes this result of blinking & beeping. I solved this issue by cutting the index of t...

Hello again, Since I have tried all kinds of LCD12864 here, it could not be that all would have some defect. I simply cannot understand the issue... I will go in depth with the LCD12864 pinning and wire them one by one using Dupont cables. It must be something else... I will post my findings as sonn...

Hello,
yes, I used the firmware from a post here directly from Geeetech for the I3 Pro B.
Then, the defines were modified accordingly and then goes the blink/beep issue...

Hello, I got the very same problem of a blinking & buzzing LCD when I try to use the GT2560 with the LCD12864. I have tried different vendors already (Geeetech, Reprap Discount and bigtree...), all have the same pinning for EXP1 & 2 and all react the same way. I would assume, that not the compilatio...