Laptop Doesn't Always Boot Up

[Pringbulbs]

Hi everyone on this forum,

I need your help because I've got a big problem.

 

So, this morning I woke up and went to my laptop for my everyday internet routine BUT it didn't turn on...

Well I was a bit disapointed, I've tried many things like booting without SSD, half-RAM, change thermal paste... and finally I did a BIOS reset (removing the battery of CMOS) and it worked.

HOWEVER I shut it down and when I tried to turn it on again, guess what ? IT DIDN'T BOOT UP... and from now I have only one solution :

1) Resetting my BIOS each time I shut my computer down to turn it on again...

 

So if anyone could explain me WHY this f*cking thing happens and how I could "cure" and repair this problem without damaging my data.

 

Here's my config :

ASUS R510J-XX068H

Motherboard X550JX

Intel Core i5-4200H

NVIDIA GTX 950m

8GB RAM

Samsung 860 Pro 512GB

 

Please help me, professionnal help needed if possible.

Thanks in advance.