Sounds as if it needs to go to a tech shop, too many things it might be to shotgun it.
My neice gave me a Gateway NV52 she bought in 2009, I am guessing it's OS is 7. She's not sure.
It did not run when I got it so I followed some advice I found online such as: removing battery then holding power button for 30 seconds.Open laptop ip 135 degrees then starting without battery.
That gets it started sometimes but when it starts there is only a gray screen which lights up. I hear the Windows startup music and can hear the fans going.
I have opened laptops in the past to upgrade ram but that's as much as I know. Any ideas on what the problem may be and what I might try to fix it ?
Thanks for any help, John B.