My Laptop doesn't sleep, doesn't shutdown, shuts down on restart.

Hello, i am facing a strange problem with my laptop. When i sleep my laptop, the screen goes black and the power button remains glowing and it never wakeup from that. When i shutdown my laptop, the screen goes black but power button remains glowing. It doesn't shuts down. When i restart my laptop, it shuts down.

Whats the problem i am facing? I have tried reinstalling the Windows 10 OS but no luck. also when i save settings in bios and restart, it hangs there for few seconds and then restarts.

Can anyone tell me what's the root cause of this problem? I am pretty sure that it's not software related. It might be hardware related. But don't know what's causing it.

Please help me ASAP.