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Solved the screen stay white and printer doesn´t work

Discussion in 'Troubleshooting' started by jorge gil, Jun 3, 2017.

  1. jorge gil

    jorge gil New Member

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    Hi everybody. i need you help, the screen stay white , what can i do? i know the answer is in troubleshooting web page, but it is out. plaese help me

    thank
    jorge gil
     
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    You need to call support and schedule a technician

    You can lift the bottom plate and inspect the wiring, but unless you see an obvious disconnected wire there is not much else you can do.
    Check the cable from the LCD to the Raspberry Pi and and the USB cable from the Pi to the controller board. Those are the obvious ones.
     
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  3. jorge gil

    jorge gil New Member

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    Thanks for your anwer. i checked those wire ,but some times works and another not, what could it be?
     
  4. Geof

    Geof Volunteer Moderator
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    Just as @mark tomlinson said above, about all you can do is check the wiring to the screen. After that you'll need to get ahold of Robo so they can diagnose and advise what to do. Sorry to hear your having troubles.
     
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  5. colton81

    colton81 Active Member

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    Mine does the same thing i believe its a screen issue. Ive learned to just deal with it and use octoprint for it but if you keep the C2 on and unplug the screen then plug it back in and restart it normally will come back up also make sure you pushed the connectors all the way in ( give it a little force push)
     
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    #6 mark tomlinson, Jun 5, 2017
    Last edited: Jun 5, 2017
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  7. Geof

    Geof Volunteer Moderator
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    Even if you dont use it I agree, they will replace it under warranty and you should take them up on that :D
     
  8. colton81

    colton81 Active Member

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    The only reason i havent contacted them is because it just a pain to have to get them to go trough all the trouble shooting before they offer to replace it. Hopefully i will get the time soon to do it though.
     
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  9. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    It is less than $10 through BangGood for a replacement screen if you would rather take matters into your own hands :)
     
  10. colton81

    colton81 Active Member

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    Yea im going to just go that route
     
  11. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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  12. David Mrazik

    David Mrazik New Member

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    Just to add to the thread, I had an issue with the white screen shortly after I bought the printer. I went back and forth with support to resolve it and they wanted the printer back. A month later, I have my printer back with a working screen. Unfortunately the printer was missing the ROBO logo plate from the head, and the filament tube is missing, but hey at least the screen works now.
    I'm not sure what wasn't functioning properly, but if it was the screen, then BangGood would have been a good and inexpensive alternative to waiting a month to get it back.
     
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  13. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Good point here is the link: https://www.banggood.com/3_5-Inch-3...r-Raspberry-Pi-2-Model-B-RPI-B-p-1023432.html

    Although you might wait a month to get it delivered from BangGood so not sure it is a win that way :)

    After adding the same LCD/Pi combo to all my other printers I have a spare sitting here so if one breaks I am not waiting :)
    There is actually a seller state-side that wants about double the price in a pinch
     
  14. daniel871

    daniel871 Well-Known Member

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    Do these LCD screens not have a pot somewhere for adjusting contrast?
     
  15. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Here is mine (well my spare at least) no adjustment.

    LCD.jpg
     
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  16. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    and the front is all screen :)

    The ALL WHITE issue is usually a bad screen, but it can be a driver failure on the Pi.
     
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  17. OutsourcedGuru

    OutsourcedGuru Active Member

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    This might be pertinent. https://github.com/notro/fbtft/issues/215
    Reading his spi-related logged messages that "fbtft_register_backlight(): led pin not set, exiting" line stands out to me. Maybe it's just that the LED backlight isn't happy.

    But of course you'd start with a 'sudo apt-get update', 'sudo apt-get upgrade' to get new drivers and such.
     
  18. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    I would be cautious updating the "RoboOS" image since we have precious little (FA really) knowledge of what exactly they have done there. OK, can intuit they have some LCD driver software running and OctoPrint and some custom plugins, but generally speaking.. .we don't know a lot :)


    ...and lest you assume that what they have done would 'just be like others have done' these are not software people -- they are hardware people. We software people can tell these things :)
     
    #18 mark tomlinson, Jun 23, 2017
    Last edited: Jun 23, 2017
  19. OutsourcedGuru

    OutsourcedGuru Active Member

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    I will say, the most likely cause is that flimsy ribbon cable holding the thing to the Raspi, tbh.
     
  20. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Don't write off a bad LCD though. These are $7 from China (not in bulk)



    Granted I have not had a bad one (yet) but that is a sample size of 10.
    Not great statistically...
     

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