Help Black screen

[bosn]

I have found several people having this same problem. A fix is all I haven't seen! I have 2 devices and they both have the same problem. I have checked, the batteries are fully charged, all connections inside have a good tight connection. I have tried the battery pull, the 1-2-3 method, I even tried a low-level charge overnight. I have tried everything I could find with no champion to hale.
Has anybody had the same problem, or even know somebody that did? I really need a fix here. So I am open to any and all suggestions.

 

[legalkill]

Mine just died on Sat, no power. I can get it to sometimes boot through the LG screen but goes black after about 20 sec. If I am quick I can get it into recovery but after the 20 secs its dead. This is with two different batteries. I guess mine is dead. I was having sim and sd card problems prior. Had the play services problem and it went away on Friday. and was fine then just died.