Booting up issue lights on but goes off and nothing happens after that

It shows light during booting but then just after few seconds it gets off. Sometimes its show rog logo but that also it gets off. I have tried remove ram and clean that. I read somewhere to get into boot menu of rog it to press and hold esc button then press power button and hold that esc untill u see boot menu appears. And that worked eventually. But today that was not working too but trying for 2 to 3 times my pc booted up. It happens every morning when i shut down my pc last night. I have tried updating and cleaning fans.