My Lenovo laptop stopped turning on. I see a faint red light flashing next to power button. Help please! Why won't it turn on?

We don't even know what model you are using.
Call lenovo support

Follow troubleshooting instructions in following link

Have you tried charging it?

Pull the battery out and disconnect the power now hold the power button in for a full 40 seconds plug just the power cord into the Lenovo laptop try to turn it on did it turn on good if not try another charger the charger may have gone bad and the battery may have gone dead but that's the next test before he was assumed that there's something wrong with the computer itself

It died. Get a new one