Default Pantech Flex P8010 Power Problem.

Hi Everyone.

i boutght a Pantech Flex P8010 few months ago, phone was working fine untill last night as i was charging it and it went off..now it cant turn on. i have tried the reset option, manually charging the battery, hours of charging but still it wont turn on.
If anyone ever had this problem and fixed it please tell me how.

Thanks.