So I've had a bit of an issue with a Raspberry Pi after supplying power to it the GPIO Pins.
My company has a device we've made that works with a Raspberry Pi as a kind of program hub. The device is suppose to supply power to the Pi from it's 5V GPIO Pin.
When our electrician handed me the new model to test with the Pi, he had also included a connection for the 3V GPIO Pin. I told him we didn't need it, and needed to be disconnected, but he assured me he didn't know what he had to plug it into anyway, so it currently wasn't plugged into anything.
So I plug the Pi in via a Ribbon cable, boot the device....
And then I notice that for some reason none of the attached peripherals are working. There's no blue smoke, no nasty popped hardware smell, but I power down the device anyway.
I unhook the Pi from the device and just power it on with your usual MicroUSB Adapter. The Pi boots fine, the HDMI still works, so I can see the display on the monitor. However, as before the peripherals and Ehernet ports all seem to be dead.
Upon further inspection, not only was the 3V Pin attached to something, but it have 4V-ish going through it. So essentially, I'm wondering if there is a way to salvage this at all or if I've permanently fried this Pi. I've included some pictures below of what the back of the Pi's board looks like right now.