Hi,
I've been working on a project on my Arduino MEGA 2560, and one day when I plugged it to my laptop, it just wasn't powering anything. Neither 5V, 3.3V nor normal pins work, which is super weird, given the built-in LED is working just fine.
The problem is in hardware, I tested it on couple of example sketches and there was still no power.
Both "on" LED and built-in LED are working, I think I might have burned something, no idea what though.
Thanks in advance!
Schematic?
Otherwise it is just a guess eg we’re you using it to flip burgers 
The words you say that are concerning: “powering anything”. This suggests you think it is a power supply
"flip burgers"? Who do you take me for?! Of course I wouldn't do that! I fried pancakes on it😉
For real though, I plugged a joystck and couple LEDs to it, so I think it's not too much.
Either way thanks, I guess it's soldering time.
Hi
There is nothing to talk about without a diagram and code
The power on LED lighting up would seem to suggest you have power to the board. You say that the built-in LED is working as well? That would suggest that power is reaching the 2560, because the LED is wired to one of its GPIO pins. On the other hand your comment seems to indicate that you have no power on the 5V and 3.3V pins.
I might have said check the onboard fuse F1, except that with that open I would expect the entire board to be dead. I presume you have checked the Mega 2560 with everything disconnected from it with the exception of USB? It seems you have power to some parts of the board and not others. I am wondering, therefore, whether you have an open track somewhere, either on the 5V or GND rail. When you are mearuing, what are you connecting the Common (black) probe to?
So,
it just started working again.
I unplugged the board, wiped it, blowed on it, smacked it a couple of times, replugged, and everything is OK. I have no idea why the board stopped workning, and I have no idea why it started. The main suspects are evil spirits, but my stupidity is the next one.
You had a thing, something happened to it, it didn’t work right, something else happened and now it does. Good story. Details are a bit vague
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.