Hibernate light runs on laptop?

Hello,
to all of you.
I have a HP DV6 Core i5 Laptop, some days ago, its heatsink has gone bad, its in the care pack, so the service center engineer came and replaced the heatsink, after that it has affected with some overheating issues as well as it hdd activity light is not running and its hibernate light running continuously, what could be the problem? Is it with the motherboard? Please reply.Thank You.
GEEKCOMPUTER_GEEK
 
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