I would like to ask for some help with RPi 3B+. It was working for three weeks and for some reason not starting anymore. I tried to wait for three day long as suggested for the polyfuse to rebuild, but nothing again. What I did before one program that I use for is reef-pi, and because my temp sensor sensed the wrong temp, I try to pull out and re plug the wire, (3.5 mm stereo jack) when I did that the RPi get shorted on some way, and now I can not restart anymore.
I have tried with two new SD cards but nothing improves. I have measured GPIO port pin 1 and I got the 5.25 volt. What does that mean? Is the RPi working or just something else?
This is my second RPi, the first RPi's SD card slot just fell off the board.