Hoping I can get some ideas on a problem I can’t seem to solve. I’ve got a MKS gen 1.4 board to replace a bad Meltzi Board from a terrible aliexpress vendor that won’t respond. I’ve tried specific Marlin firmware for MKS gen 1.3, the stock Marlin firmware, Osoyoo Specific firmware for both the reprap graphic controller, and full graphic controller. The farthest I got was the osoyoos firmware here:
Where the screen would flash and beep constantly, and the blue light would flash when turning the knob on the display. I’ve used the proper motherboard settings on the on all of them(33), multiple different LCD controllers and really am at a dead end here.
So my question is this. Is there a way verify the firmware is even working properly without an lcd panel functioning? Is there a proven path to get these boards functioning? I’ve got a spare ramps 1.4 board and it worked flawlessly with the LCD panels I’ve used. Any help would be appreciated.
Here at 3Dealo we’ve been using gen 1.3 for quite some time. It’s a very well made board with a lot of resources but the support sucks. On the brighter side, most solutions that work for ramps 1.4 will work just fine on MKS. We still haven’t tested the 1.4 version but I think that it’s not that different from the previous one.
If I remember well, we had the same issue in the beginning and it was solved setting motherboard as follows:
// The following define selects which electronics board you have.
// Please choose the name from boards.h that matches your setup #ifndef MOTHERBOARD #define MOTHERBOARD BOARD_RAMPS_13_EFB #endif
You guys are great, thanks for all the ideas. Swapping the insert direction on the exp1 and exp2 did the trick. I’m still going to try the motherboard change in the config to actually figure out why the pins are inverted. I’ll add to the thread if I discover the root cause. Thanks again for all the support, you guys have been great.
I was going to plus one that as well. I bought a really cheap full graphics and board and had to swap the direction as well Makes me nervous about what else can be messed up on the boards.
if after flipping the connector, you only have a blue screen with no text (on an ender), go back into Marlin and comment out the LCD lines like:
//#define REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER
