Every now and again while im using my PC the screen goes blank and theres no picture feed. If i use the reset button on my PC without turning it off, i get 1 long beep and 2 short beeps and still no picture. If, however, i turn off the pc completely and restart, its fine again for a few weeks. Any Ideas ? MB is Msi 970 gaming American Megatrends bios,Ati Radeon RX470 4gb gpu,AMD Fx8350 4gHz cpu, Arctic 750w psu, 4x4gb HyperX 1866mhz ram. Windows 10. Nothing is overclocked. Everything running well within temperatures.