Your device may shut down without warning in attempt to prevent damage to its hardware.
Blocked Air Vents
Your lap is a bad place for your laptop, because it can block the vents and cause a lack of airflow. If you must place your laptop on your lap consider using a cooling pad(enter link to cooling pad) or try using a hard flat surface when using your device.
Oftentimes dust accumulates within your device and can cause the fan to overwork. The simplest and most common of solutions here is to thoroughly clean your device of dust and dirt( guide here on proper cleaning techniques). If your fan is still not working up to standard you could apply a new layer of thermal paste.
, and lastly, when all else fails check out our guide on how to replace the fan.
This is probably due to your fan not working properly, replacing it with a new one(link here) should fix this problem.
Battery not holding a charge
The battery is not holding a charge even though it is plugged in all the time.
Too many tabs open
Gaming laptops like the Lenovo Legion y520 are not made to last a long time without being unplugged, however, they should be able to last you around 3 - 4 hours. If it doesn’t hold a charge for at least 3 hours then you might need to replace the battery. You could also try and adjust your brightness setting and close some tabs. This should help your battery last a little longer.
The battery itself may be faulty and in that case you will need to replace the whole battery. Try replacing it using this guide.
Start up screen is a black screen
Your screen is black even though your device is turned on and the keyboard may even be lit.
Display not detected
Windows may not be detecting the display properly. Try pressing the Windows key + Control + Shift + B on your keyboard to wake the display up.
Hardware Causing Distress
The hardware installed onto the laptop can be causing stress. Try performing a hard reset, also known as a factory reset, to clear out the offending hardware.
Computer will not turn on
Device is not responding to the power button and will not power on or start.
Two signs that the battery is dead is the laptop will die without the AC adaptor, or the battery life seems less than normal. The Lenovo Legion Y520 laptop's battery life is three to four hours. If the battery has been tested to be functional, then it has a computer malfunction that needs to be addressed.
Your RAM card may have gone bad which can botch the boot up process. In this case you will need to replace the RAM. You can do this by following our guide.
Keyboard not responding
The keys on your keyboard are not responding or are broken/missing.
Something may have gone wrong with your keyboard during startup so try restarting your laptop to see if it will correct itself before moving on to more complicated solutions.
Keys are blocked by dirt
Keys can often be blocked by dirt and dust that will get stuck beneath them. If your keys seem to be stuck in place try removing them and cleaning underneath to make sure there is no blockage or gunk stuck that may be inhibiting the keys’ movement. Use this guide to remove your keys.
Sometimes the entire keyboard is faulty and you may have to replace the keyboard itself. You may need to remove all the keys so use this guide.