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Computer black screen upon USB

Tweakforce_LG
By Tweakforce_LG
in Troubleshooting
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Hey everyone. I use an old hp 6730b from 2008 for driving security cams. I have a cooling pad, and 2 usb webcams connected, and both cams use long extension USB cables. When i have both cameras plugged in, the screen goes black just before the second camera displays an image, but before now i only ran 1, and it works with 1. I unplugged the cooling pad and it still goes black with 2 plugged in. But with one or the other in it works. Any help please. Btw when it goes black, no hdd activity

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