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I have HP omen laptop, comes with Nvida graphic cards, but it was giving me worry message saying cannot find graphic card, I tired to change the display settings, and meant to restart it self, but since the laptop turns on but no display, connected to TV via hdmi no luck. Tired to access Bios by pressing windows keys + V + power button, comes up with error message “CMOS Rest(502)”  to reboot the customer asking me to enter, but nothing happens after, still stay on Balck screen while laptop is powered on, can someone advice me on this please 

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