I've got a problem with my Nikon D5100 that I bought in 2012/2013. It's either the camera itself, the battery or the battery charger.
I don't know anyone with my set of equipment and can't really test whether it's because of the battery, charger, or camera. Therefore I want to know whether there are other means of how to check if the fault lies in one of them (or all of them) and how to solve it without spending money for another camera.
It used to work fine. I shot a fair amount of pics and (mostly) recorded videos of around 5 minutes each. Then I didn't use it for a few months. Yesterday I wanted to use it again. Charge it. Put it into the camera. And now it doesn't work anymore. The green light in the battery folder is lightning up when I put it in. And there is also a sign that the battery doesn't have lots of energy anymore - even though I charge it the whole night.The display doesn't go on. Needless to say I can't take any pictures with it. I never used flash or anything like that.
I've read a lot of posts that the battery of the D5100 is the culprit. Therefore I'm currently tending to buy a new battery (this time not from Nikon again but from a 3rdd party) or a grip. I've also read though that 3rd party batteries don't work in the newer D5100 (meaning cameras bought in around 2013) anymore?
UPDATE: So I bought a pair of new batteries from Patona. Charged it. Put it in my camera and shows the same behaviour as before: Green light of the the SD card reader goes on for a short period of time and goes on. Other than that no reactions from the camera whatsoever (no display, no other functionalities work).
I assume it's not the battery nor the charger. Probably something wrong with the camera itself. Maybe software or mechanical stuff within the camera?