Computer turning on but screen is black

I've had this Lenovo Ideapad P400 for a while, probably two-three years and it's really nice! I've been away from my laptop for about a month and a half. Now, I go to turn it on and the keyboard lights work but the screen is just black. I've tried to Shift + F8 and then Power but nothing. I'm NOT A COMPUTER TECH, so i don't know terms and stuff this is all very confusing.

How do I block private numbers on a Android 6 Marshmallow (or 6.0.1) smartphone?

I keep getting calls from private numbers at night and I would like my phone to auto-reject them.

I have a Lenovo P2 smartphone running Android 6.0.1 and it does not have that option anywhere in the menu. My old 2011 Samsung had it, but this 2016 Lenovo seems to have taken it off.

How do I block those annoying private-number callers?

Which is THE BEST PHONE to buy under 9000?

I'm planing on buying a good phone… Under 9000 which do you thing is the best. I'm think about coolpad note3 or lenovo vibe k5 plus. (and what about XOLO black 1X. Can Xolo be trusted)

Android Lets get started Malware?

So, I was using my phone(Lenovo A328), I'm playing a game name "Fatal Fight"(downloaded through Playstore) when my screen suddenly became whitescreen and has a loading bar at the top. After it finishes my screen goes black and suddenly a text popped up saying on a yellow text "Let s Get Started", I immediately pressed the home button and downloaded and quickly scanned the phone, as the scan is going on it detected 4 viruses right now. Please reply a solution As soon as possible.

What is a better budget smartphone lenovo k4 note or blu vivo 5?

So I've been looking for a good budget phone which have a premium built without sacrificing its specs. As of now, i've been considering on buying one of these two phones.
In terms of freebies, The lenovo k4 note have vr headset and the blue vivo 5 have free jelly case, screen protector and an adaptor.
Which do you prefer more? Or if you have any suggestions please feel free to recommend.

Different ringtones for different callers?

I got Lenovo P70 dual sim smartphone and my second SIM is from my work. How i can set ppl calling me from my sim 2 to use different ringtone from ppl from sim 1?

Lenovo Vibe Z2 Pro (K920) stuck on boot up screen?

So there was a system update. I downloaded it and installed it. It installed and everything but when I tried to turn it on it showed the Lenovo logo and "Powered by Android", that disappears and then the Lenovo boot up intro starts playing. Now that intro is the problem. It freezes halfway trough. Sometimes later sometimes sooner.
I tried everything. I launched into recovery mode and factory reset it, ereased user data and wiped fuse data (or what it's called).
The phone is rooted but I have not had any problems with it as to now.