Phone not turning On

Hi,

I have Lenovo p2a42 phone which has gone dead since 2days now and is turning on at all. I have tried couple of ways as suggested by people with similar issue but all efforts in vein and the phone is still in dead condition. When i put it for charging red light blinks on/off and thats it. This phone battery cannot be removed so not sure what other things i can try but any help suggestions would be of great help . Could you please advise? Thank you.