Dell inspiron 15 5030, no battery LED power, auto shutdowns after sometime,

Good day!
To fix this problem, i have tried many operations to do.:
even after Hard disk formatting operation it may still shutdown
the things i NOT tried.:

1) downgrade BIOS to the factory A00 (now i have A02)

2) clear a cooler fan (inside)

3) check and change temperature utility  for critical (if Dell has so)

4) not sent yet my Service Tag number 

5) not use any spyware

 just now successfully finished Dell Data restore utility

still trying to find some solutions, any advice i appreciate,

Please help!

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