My Lenovo y50-70 was plugged and charging during a storm and I wasn't awake to know exactly what happened but the next morning the laptop wouldn't boot. The laptop turned on, keyboard lit up, fans and HD spun, but nothing on the monitor. I tried connecting it to an external monitor to see if the laptop monitor was damaged and nothing would still display. I took out the battery and tried turning it on with just the power adapter encase the battery was faulty and damaged but it didn't do anything different. I even tried that hold power button after everythings unplugged then plug in adapter only and that didn't do anything. I took out both ram sticks one at a time then tried a ram stick from another laptop I knew worked and nothing different happened. At this point I figured my gpu, cpu, or motherboard is damaged in all cases requiring a motherboard replacement. I bought a new motherboard and installed it today so new mobo, cpu, and gpu but the same exact thing happens. Powers on, everything spins up, nothing displays on the laptop monitor nor external monitor. When I hit the power button it turns off right away. I installed a new SSD with the new motherboard too so a bad harddrive can be ruled out. Any idea whats going on? I figure even if the monitor is shot on the laptop it should still display on an external so I am totally at a loss. Just unplugged everything from the motherboard and reattached it making sure everything was in but nothing changes, very strange. Any help is appreciated.