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Chris331
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No usb power no video 3 long beeps 2 short beeps

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Hp omen 880 desktop

Okay so I have an aftermarket 750 watt evga power supply that I have tested in other PC's since the issue it is known to be good I've tried 4 different sticks of ram in my pc and other PC's they are also known to be good sticks of ram I have an aftermarket graphics card it's a radon 470 sapphire nitro that is also known good however I am not getting any usb power or any video signal I'm getting 3 long beeps and 2 short beeps I have tried every troubleshoot imaginable and nothing at all has changed and I can't find any videos or any information on my problem it's as if it hasnt existed till now lol any and all help is very very appreciated

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Technicalshamu
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Try removing  the dedicated  graphics  and boot ur computer with integrated  graphics.  And update  all the device  drivers  by going to device  manager . Then plug in it with factory  fitted  dedicated  graphics 

 

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Chris331
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I'm getting no power to my keyboard or mouse and no signal to my monitor with or without the graphics card 

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