I am running Windows 7 on my computer with Core 2 Duo cpu and HD4850 graphics card installed on it. My case contains a 350 W psu. Recently my computer has started giving me the problem. During gaming, sometime it suddenly turn itself off while other time it goes into sleep mode. In either of the case, my computer is still left running. But there is no display on my monitor. I have checked the cables and everything seems to be perfect. Is it because of my power supply? I have six pin power supply unit. Isn't this enough to run my computer and monitor? Should I upgrade my PSU to higher voltage?
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