I work from home using VPN. I connect to my company via a router with a monitor connected to HDMI (only one HDMI port available). I have been using an older monitor as my 2d one successfully since last year. It is connected with a VGA to DP cable. The other night it suddenly went blank, no power, no anything. I tested it with another outlet and got power but it seemed each time I attached the VGA/DP cable, it went dead. I called my lame IT department and they were no help. I purchased a new VGA/HDMI cable thinking that was the problem but it still does not work nor does it work on another older 17" NEC monitor I had. I have ensured the display settings are correct (extend to 2d monitor) and nothing had changed up to the moment it all went dead. My IT department said they have not done any hardware or firmware updates to my router.

Can anyone help me figure out the problem before I go an invest some big money in a new monitor? I'm lost. Thanks in advance.