Flickering Graphic Smart Controller

New Home Forum Mostly Printed CNC – MPCNC Troubleshooting – MPCNC Flickering Graphic Smart Controller

This topic contains 10 replies, has 4 voices, and was last updated by Profile photo of Barry Barry 1 month ago.

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  • #30200
    Profile photo of Alex_A
    Alex_A
    Participant

    Hey all, I’m in the process of pulling together my first MPCNC build–which has certainly been a lot of fun, and learning experience so far, though I’ve definitely got a ways to go 🙂

    So far, the actual process has been relatively uneventful in that nothing has gone awry; I’ve printed the parts, built a workbench, assembled the pieces, run the wires, connected the stepper motors and got Repetier Host installed and recognizing the board. Unfortunately, while working through the process, I noticed that the Graphic Smart Controller doesn’t work (or at least doesn’t appear to) all I get is a flickering white screen and a clicking noise when the ramps board is powered on.

    The issue appears somewhat similar to one that was posted on the forums near the end of January, https://www.vicious1.com/forum/topic/lcd-flickering-white-screen/, though the issue does not resolve/clear up when USB is plugged in. Also, here’s a link to a short recording I have of the issue I’m experiencing–hopefully it’s enough to help illustrate my issue. I’d appreciate any/all assistance anyone may have!

    Also, and as a bit of reference, I purchased my parts via the bundle with the upgraded 30A power supply from the site so there shouldn’t be any “weirdness” introduced by dicey components. Hopefully this is a minor hiccup.

    #30217
    Profile photo of Bill
    Bill
    Participant

    Show us pictures of the connections between the display and the RAMPS. Also, are there any bent to the side pins between the Arduino and RAMPS?

    #30255
    Profile photo of Alex_A
    Alex_A
    Participant

    I’ve attached photos showing the the ramps, mega and display boards. As you can see in the the one photo below, the outer most pin (top right with the board oriented with power on left) on the ramps board appears slightly bent, though I checked and was able to determine that the pin was not bent/incorrectly inserted into the display board. Additionally, I checked each of the pins on the ramps to ensure that they to were not bent, and they were in perfect working order; no bent pins. I had hoped that the unseating and reseating each of the board pins after my review would in some way resolve the issue (long shot I know), unfortunately–and not surprisingly–it didn’t work and the screen is still flickering and making the audible clicking noise.

    Maybe you will see something I missed though so do feel free to let me know if you happen to see anything in the pictures!

    #30261
    Profile photo of Barry
    Barry
    Participant

    One of your cables is backwards.
    https://goo.gl/photos/NXhqoNh6J5T4C2Sj8

    #30269
    Profile photo of Alex_A
    Alex_A
    Participant

    Barry, looks like you may have identified something I missed. I reviewed my mpcnc wiring setup and confirmed that while I installed my cables correctly the actual connectors on the display board appear to be flipped. I’ve attached a picture of the board connections on my own board along with a partial screenshot of the connectors of the board from the mpcnc store page. Can’t confirm that this is the source of my issue, but it’s looking to be a step in the right direction.

    Thanks!

    #30281
    Profile photo of Barry
    Barry
    Participant

    Yep, there’s your problem! Should be able to just cut a notch with an exacto knife, or something similar. Those kids soldering these things up for 2 cents a piece don’t have time to check this stuff! 😉

    #30284
    Profile photo of Alex_A
    Alex_A
    Participant

    Thanks, worked like a charm! The screen is up and running without issue and I can control the stepper motors. I appreciate everyone’s feedback and help with this!

    #30289
    Profile photo of Barry
    Barry
    Participant

    WOOT!

    #30311
    Profile photo of Ryan
    Ryan
    Keymaster

    Well that is a new one. Sorry about that, what a crazy issue. Thanks for the help fellas.

    #30321
    Profile photo of Alex_A
    Alex_A
    Participant

    Yes, certainly a weird issue, but easy enough to fix. Thanks again guys, really appreciate it!

    #30331
    Profile photo of Barry
    Barry
    Participant

    At least this display has tabs. The one on my printer doesn’t, so you can plug them in any direction you want!

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