Black screen with blue keyboard light, unable to boot

My laptop is a Gigabyte G5 GD, with i5-11400H and RTX3050.

I tried to change my thermal paste after 2-3 years of usage. And now my laptop unable to boot after I change the thermal paste and reassembled it. The laptop now whenever I tried to boot showed a black screen with a blue keyboard lights on.

What I had tried:

Connected to a external keyboard and click on caplock to see any changes but the caplock light ain’t turned on

I had no external monitor to check on the screen condition

What can I do next?