Hi, I’ve had this GL502VM Asus laptop for about a year now.Performance has been great and it didn’t show any real issues until the left arrow key stopped working about a week ago. Then afterwards one day it suddenly stopped working even when plugged in.It has a non-disconnectable
1. Unplug your charger cord.
2. Remove the battery.
3. Press and hold the "Power" button for 30 seconds.
4. Now plug back in the power/charger cord.
5. Now put the battery back in.
If this doesn't help, then test the power cord to see if it is good. Either try your cord in another device, or try another devices cord in your laptop. You may also want to try charging it when the device is off, rather than on. If it works then, the cord is probably the issue.
Should that not be the problem, then check the battery to see if it needs replacing.
NOTE: While the battery may be complicated to get to, it should be removable/replaceable. Unless it is under warranty, then you should contact the manufacturer.