Lenovo G780 startup problems & freezing

WildWasteland

Estimable
Dec 25, 2014
2
0
4,510
Hello, everybody. I have a Lenovo G780 laptop (windows 8.1), it's about a year and 3 months old and I've been experiencing problems with booting it up for quite a while. First it started in June, when I had to use it every day because of exams, it frequently overheated and left me stuck in the start-up screen (black screen with lenovo logo). One day it just stopped working and I had it serviced (they had to completely replace the hard disc).
After that I occasionally had the same problem, but afer doing a hard boot (taking out the battery and holding the power button for 30 seconds), or just leaving it alone for a night, it booted up normally. Also the keyboard stopped working once, but right now it's ok.
Right now I had the problem again, but leaving it alone didn't work, same with hard-booting. After a lot of tries it finally booted, but when I left it on and going out for half an hour, I found it frozen. I restarted it, but it wouldn't boot up again, so I did a hard boot and it worked, but it started up really slowly.
I'm not that skilled with computers, so I don't know what might be causing it, and I can't disassemble it to see it myself, as I'm afraid I won't be able to assemble it back. Does anyone have any similar issues and/or knows what might help?
 

WildWasteland

Estimable
Dec 25, 2014
2
0
4,510

probably not a windows problem, as there were no software bugs and I can't even log into bios when the problem occurs.
recently opened up the laptop, no visible dust inside, fan is working fine.
 

Kainashi

Estimable
May 5, 2015
1
0
4,510
I am experiencing this problem now. Although it has only just started acting up. I cannot log in, because it freezes just as it is. If I am able to find the solution I will let you know.