Black Screen - Raspberry + TFP401 + 5'' TFT display

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ENITaero
 
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Joined: Tue Apr 24, 2018 4:58 am

Black Screen - Raspberry + TFP401 + 5'' TFT display

Post by ENITaero »

Hello,
I am the owner of a raspberry PI that I use as part of a school project.
This project aims to make an aeronautical GPS. To do this, I use a Raspberry PI 3 ans the software XCsoar.
I bought on adafruit a 5 '' TFT display with touch screen and a TFP401 HDMI/DVI decoder board.
However when I connect the 3 components the screen does not light up ... (see attached pictures)

What is certain is that the raspberry is working properly (I tested it on a TV)

I also tested the 5’’screen by connecting it directly (via the 40 pins) on a commercial GPS (brand MAPPY). The 5 "TFT screen was turned on.
I also plugged the screen of the GPS Mappy on the TFP401 (connected to the raspberry). The screen does not light on either (while on the GPS MAPPY it works correctly ...).
In conclusion none of my 2 screens (GPS MAPPY and TFT 5 "with touchscreen) light up when they are connected to the TFP401, while the 2 screens light up when they are connected to the GPS MAPPY.

So I think that the origin of our concerns is the TFP401 board .... However, the leds : blue (HDMI), green (power) and red (touch) light on the TFP401 ...

Do you have an idea where the problem may come from? Bad connections? TFP401 broken? computer coding to achieve on raspberry?

Thanks for your answers.
Jean Baptiste
Pictures of component testing
Pictures of component testing
Pictures.jpg (386.38 KiB) Viewed 287 times

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adafruit_support_mike
 
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Re: Black Screen - Raspberry + TFP401 + 5'' TFT display

Post by adafruit_support_mike »

Did you edit the RasPi's /boot/config.txt file as shown in the tutorial?

https://learn.adafruit.com/adafruit-5-8 ... -pi-config

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