If your system keeps turning off every few minutes and doesn’t turn on, there is a high chance that the AC adapter has malfunctioned. Before calling a professional for try changing the AC adapter. There is also a possibility that the DC power jack may have broken. Before getting a professional service scheduled, try adjusting the plug’s angle in its jack and it should save you from cost. If that doesn’t help it’s an indication of a motherboard issue. You will need to schedule a service to get the motherboard change. If you notice lines on your screen, it may be a result of a hardware failure or due to damage to the screen. This doesn’t really indicate a display fixing. Unplug your system, hold the power button for 30 seconds and restart the system. If this doesnt help, you will need to be change for a professional service.