Adafruit 1.8" Color TFT Shield backlight does not work

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Euripides1
 
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Adafruit 1.8" Color TFT Shield backlight does not work

Post by Euripides1 »

So i just soldered my shield plugged it in and run the graphics test from the Adafruit_ST7735_and_ST7789_Library. It barely shows on the screen. But, if i hold the reset button on the shield it lights up.
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adafruit_support_carter
 
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Re: Adafruit 1.8" Color TFT Shield backlight does not work

Post by adafruit_support_carter »

What if you press down on just the TFT it self?

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Euripides1
 
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Re: Adafruit 1.8" Color TFT Shield backlight does not work

Post by Euripides1 »

I tried pressing on the tft and still nothing, it didn't make a difference

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Re: Adafruit 1.8" Color TFT Shield backlight does not work

Post by adafruit_support_carter »

Holding the reset button should prevent the code from running. So seems weird that it would turn on the backlight. Seems more like some kind of connection issue. Is that behavior very repeatable? Can press/hold reset button and backlight reliably comes on? Release and it goes off? Press again, back on? etc?

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Euripides1
 
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Re: Adafruit 1.8" Color TFT Shield backlight does not work

Post by Euripides1 »

Yes that's exactly what the reset button currently does. I don't think there is a connection issue, as you can see from the pictures

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Euripides1
 
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Re: Adafruit 1.8" Color TFT Shield backlight does not work

Post by Euripides1 »

So could you tell me what we can do about this?

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Re: Adafruit 1.8" Color TFT Shield backlight does not work

Post by adafruit_support_carter »

This behavior is very odd, but seems most likely a connection issue. Please go over all soldering connections and make sure they are good. General ref here:
https://learn.adafruit.com/adafruit-gui ... n-problems

Reflow any pins that appear to be under solder or cold solder and not wetted out enough on the pads:
solder.jpg
solder.jpg (76.83 KiB) Viewed 71 times

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