No vedio
swap monitors if monitor is same dell brand then its the monitor. otherwise you can buy a Video card PROVIDED that you can disable from setup the MOBO video card, and install drivers, also speaking of drivers try uninstalling the video and monitor drivers first !! the do mon swap, finally new vid card .
funky things can happen to drivers, esp improper shutting down windows like flip a power switch or not having a UPS and computer shuts down during a power outage or storm. seen this happen as well.
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