My phone wont power on or charge

[Simply_1]

hello. Im trying to get my moms old phone to work, its a verizon lg g2 4g lte vs980, and everytime i try to turn it on by holding down the power button, it repeatedly vibrates with a black screen. When i plug it into the phone charger, it vibrates once, has the lg screen for about 2 seconds, shuts off, and then does the same thing over and over again. any idea whats wrong or how i can fix it?

 

[hang-the-9]

Probably a bad system board or memory chip. Either way, you can get a working used phone for cheaper than getting it fixed.