My front camera was working fine today untill this evening, and then everytime i switched my camera to the front to take a "selfie" it wouldnt work ive tried everything from the internet and even screwing the back off of my GS4 and removing the front camera part and putting it back in. My back camera works fine but when i switch to the front its pure black and says " camera failed" and on instagram it says "camera can not connect" but thats only when its not in the charger, when it is in the charger it just stays pure black and camera settings work but just wont take the picture, and my snapchat front camera wont work either.... plz help me i just had a problem with my power button which i fixed now this!!