My Lenovo c260 screen won't turn on after trying to boot Ubuntu from USB?

I tried booting Ubuntu from USB several times, but it didn't work. Then one time, after starting up it told me to choose an OS. The options were Windows and Ubuntu. Of course, I chose ubuntu and waited a little bit and left the room. When I came back, the screen was blank, one light was on (the one on the far left of the three in the bottom left corner of the PC), and I could still hear the fan running inside. That was yesterday, and it's still the same. I've tried a lot of troubleshooting, but everything I do accomplishes nothing. Please help!

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