If you are having trouble with the Samsung NP-QX411L, then check out the troubleshooting page.
Background and Identification
To determine if this is your device turn over your laptop and look for a Samsung product label on the left side. On this label you will see a line that reads "MODEL" followed by your laptops model. Make sure it reads NP-QX411L.
The Samsung NP-QX411L was launched in early 2012. Distinguishing it from other similar laptops, it has a silver (almost black in certain light) color shell with the Samsung logo located in the left center on the outside of the monitor. The Samsung NP-QX411L is a carry forward series model of the Samsung NP-QX411. Additional letters and numbers in the product name refer to the processor and country the computer was made in.
This laptop has a 2nd generation Intel® Core™ i5-2450M Processor (2.4GHz). The monitor is a 14" LCD with a resolution of 1366 X 768. The NP-QX411L has a 1TB Hard Drive capacity and 8GB of DDR3 RAM. With the dimensions of 13.7" x 9.7"x 1.07" the NP-QX411L was made to be a slim laptop at the time. This model also includes a 3 watt speaker, 2 megapixel webcam, a 4-in1 multi card slot, headphone port and 3 USB drives.