screen stays black after put on sleep but still power on

MacBookPro A1286 Early 2011 15" MC721LL A

Hello, everyone, this is my first post.

I need bit help when I put my MacBook Pro to sleep, after the taking lid back to normal, the screen stays black. the keyboard does not wake up the screen. the not even power button, I have to power on and off 3 to 4 times to make a normal boot. please help me to solve this

Many Thanks!

Update (02/23/2017)

I was searching and found what I think is the answer, I have to change this part to make the sensor work.

Apple Unibody Macbook Pro 15" 2011 A1278 Hard Disk Drive HDD IR Sleep Cable

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Can anyone confirm it

Answer this question I have this problem too

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