HP laptop two month old doesnt start

Hello there, plz be a nerd cuz i need ur help

I got an HP Laptop at home, that doesnt wanna start anymore, i tried the 30 seconds method (longer too) and then i tried this one
https://ccm.net/forum/affich-688572-acer-laptop-wont-start-up that worked, when i put my laptop off cuz I'm done using it and later i tried again to start up But it was the same problem so i did this one again https://ccm.net/forum/affich-688572-acer-laptop-wont-start-up and it work, for 2 days long i didn't put my laptop off (only in sleepmode) only 1 time for 10 seconds But when i started it up it just worked, so i put it just off and a copple of Hours later i tried to put my laptop on But it didn't work so i tried this again https://ccm.net/forum/affich-688572-acer-laptop-wont-start-up But it didn't worked, te ram sticks are working, i put it into an other laptop, iTS 2x4 gb for the people who wanna know.
Please tell me an other method or trick plz

Extra information
I didn't game on it
I got the laptop 2 months (new)
I never let if fall or let the power fabel there too long in

Please help me gaat i need to do an project for school!