Are there any cheap remote management consoles out there that: (a) work from bare metal? and (b) work over TCP/IP?

I ask because my Windows server is in a cupboard downstairs. When it goes wrong, I can usually remote desktop to it. When it goes severely wrong, I need to either rig a monitor to it (and there's not a lot of space), or I need to bring it upstairs to my study.

Are there any such devices as a VGA-to-VNC/RDP converter?
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-- roger