ASUS ROG GL552V does not turn on

i have a gaming laptop and i rarely use it, but i just started to use it again.

i try to switch it on, but now nothing shows up on screen. the battery light is green and the battery is fully charged. when i plug it into its charger, the power indicator turns on and the battery symbol also goes green. the power button lights up, but after a few seconds theres a soft click sound at the right hand side and all the lights turn off. nothing shows up on my display.

i have tried to remove battery, plug into charger, press and hold power button for 40 seconds etc, but nothing seems to be working.

any troubleshooting methods i can use without consulting a specialist?