7" Sparkfun Touchscreen - not powering - no display

Development Boards Raspberry Pi
1

Got a 7" Sparkfun Touchscreen for Raspberry Pi - Raspberry Pi LCD - 7" Touchscreen - LCD-13733 - SparkFun Electronics
Appears touchscreen may be DOA

Followed the setup guide found here: https://cdn.sparkfun.com/datasheets/Dev/RaspberryPi/how_to_assemble_the_rpi_touchscreen_display.jpg

Disassembled and re-assembled to ensure there was no bad connection. Still no go.

Is there some way I can test the touchscreen to verify if it is indeed ‘dead’ and not doing any output? The fact I’m getting no output - even just a blank screen or ‘light bleed’ from the edge of the screen makes me suspicious that it is the touchscreen itself that is the issue.

Running power via the GPIO pins from the touchscreen board to the raspberryPI board - I do see power to the PI - so that mean the touchscreen board is at least

  • accepting power
  • passing power to at LEAST the GPIO pins
    Raspberry PI 3 Model B+ - works with HDMI output to a standard monitor
    AC Adapter is a 5.1V - 2500ma microUSB

Thanks

2

2 things:
Are you trying to use screen + hdmi at the same time?
Are you powering the screen separately? Try powering it separately over usb if not

You can also confirm config/settings like so:

  1. SSH into the Raspberry Pi (or just run it with hdmi cable)
  2. Run the command sudo raspi-config
  3. Enable SPI and I2C
  4. Save and reboot
  5. SSH into the Raspberry Pi again (or just boot if using hdmi)
  6. Run the command sudo nano /boot/config.txt
  7. Change the line dtoverlay=vc4-kms-v3d to dtoverlay=vc4-fkms-v3d
  8. Save the changes and reboot…(disconnecting the hdmi if it is being used instead of SSH)

Finally, you can run through Official 7" Raspberry Pi Touch Screen FAQ - Announcements - Pimoroni Buccaneers as a final shakedown…if still nothing after - Was it purchased from us? (If not, contact vendor)…if so, head over to Return Policy - SparkFun Electronics and fill out an RMA request

3

Thanks for the reply!

I tried all of the listed steps - no go.

I did purchase this through SparkFun - I’ll see about filling out the RMA - thanks for the assistance!

4

Received the RMA replacement unit - and that works!
Should the old one be sent back?

5

No need in this case; you’re all set