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Raspberry Pi Forum 7 inch touchscreen display is completely dark wont turn on
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Forum Thread Details
  • State Not Answered
  • Replies 11 replies
  • Subscribers 666 subscribers
  • Views 4231 views
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  • 7 inch touchscreen display
  • 32gb
  • stickyfingers-kali-pi
  • raspberry_pi
  • 7" touchscreen display
  • raspberry pi model 4b
Related

7 inch touchscreen display is completely dark wont turn on

chriscart
chriscart over 5 years ago

i had to reinstall  after it crashed trying to do apt-get upgrade and after that i put sd card in power on and nothing happens red light stays on with a blinking green light as well any assistance with figuring out why the touchscreen wont turn on plus fixing the apt upgrade issue, im aware i have to install the complete version before initiating the upgrade command but when i run that command it says theres no version in the repository... ?

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  • onegoodeye
    0 onegoodeye over 5 years ago

    There's a few things wrong with the wiring. You followed the wiring for a PI2 not a Pi4.  You likely pick it up off the element14 product page. Shame on element14 for letting 5 year outdated information on their site.

     

    I've attached a pic from my broken iphone of the wiringimage

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  • onegoodeye
    0 onegoodeye over 5 years ago

    There's a few things wrong with the wiring. You followed the wiring for a PI2 not a Pi4.  You likely pick it up off the element14 product page. Shame on element14 for letting 5 year outdated information on their site.

     

    I've attached a pic from my broken iphone of the wiringimage

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  • chriscart
    0 chriscart over 5 years ago in reply to onegoodeye

    in that image are you trying to show the correct way to wire the raspberry pi 4b to the 7 inch touch screen and you were correct on assuming that i got the wiring diagram from element 14 but its extremely hard to see the setup in the picture you sent me if you can elaborate more?

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  • hugohu
    0 hugohu over 5 years ago in reply to onegoodeye

    The pinout on all raspberry Pi's are the same.

     

    26 pin headers are the same just with 14 additional pins on the standard 40pin GPIO.

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  • onegoodeye
    0 onegoodeye over 5 years ago in reply to hugohu

    then the wiring on their site is incorrect

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  • onegoodeye
    0 onegoodeye over 5 years ago in reply to chriscart

    Sure

    Color         Function           RPI PIN

    --------------------------------------------------------

    RED:          +5v                    2, 4

    BLACK:     GROUND           6, 9, 14, 20, 25, 34, 39

    YELLOW: CLOCK               5

    GREEN:    DATA                 3

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