Hi,
when I was making a project with an LCD, I accidentally connected the 5V and GPIO3 to the LCD's VCC and GND, respectively, while I'm supposed to connect 3.3V and GND.
The backlight of my LCD was still on, so I didn't notice it until I found that I couldn't show anything on the LCD.
Then, I immediately changed the connections back to normal and tried running my code again using WiFi SSH from my computer.
I think it worked for a few times, and the LCD showed the correct image.
However, suddenly the RPi's LED near the reset button turned red, and it disconnected from my WiFi. I tried unplugging and re-plugging the power to my RPi, the LED turned green, but it never connected to my WiFi again. I got my SD card out and checked its network-config file, and everything was normal.
I was using Raspberry Pi 5. The initial boot was around 2 months ago, using the official imager 2.0
Why is this happening? Is it related to my wrong connections of the LCD? How can I troubleshoot it?
Thank you very much.
when I was making a project with an LCD, I accidentally connected the 5V and GPIO3 to the LCD's VCC and GND, respectively, while I'm supposed to connect 3.3V and GND.
The backlight of my LCD was still on, so I didn't notice it until I found that I couldn't show anything on the LCD.
Then, I immediately changed the connections back to normal and tried running my code again using WiFi SSH from my computer.
I think it worked for a few times, and the LCD showed the correct image.
However, suddenly the RPi's LED near the reset button turned red, and it disconnected from my WiFi. I tried unplugging and re-plugging the power to my RPi, the LED turned green, but it never connected to my WiFi again. I got my SD card out and checked its network-config file, and everything was normal.
I was using Raspberry Pi 5. The initial boot was around 2 months ago, using the official imager 2.0
Why is this happening? Is it related to my wrong connections of the LCD? How can I troubleshoot it?
Thank you very much.
Statistics: Posted by Caspar9872 — Mon Jan 12, 2026 9:52 am — Replies 0 — Views 37