Typically this has to do with the battery in some capacity. Either the battery itself is having issues, or the power adapter connected to it may also be a problem. This can usually be quickly fixed by checking the connections that run from the outlet to the adapter, and from the adapter to the charging port on the PC. The battery itself may be damaged or loose. You can find some of our common troubleshooting methods [[Asus R510LA-RS71 Troubleshooting|here]].