most likely wont damage the switch, do you have power supply for a phone? a little ingenuity to get power to each camera. keep it off the network cable.
looks like the over heated pins are on a prom??? any burst caps or bulging resistors?
you may have to power each camera one at a time and live view with built in software.
at the least, narrow it down to just the nvr and/or power issue...
also did you get a replacement power supply or is it...
using version 2.00.08.50
looking to have my camera views rotate or tour. not seeing the option other than the ptz patrol mode. is this feature available in ivms4200?
has moisture infiltrated the connections at the camera?
having your background... i bet you already checked input voltage to the nvr.
keep drip loops at your camera connections.
not sure if this has been posted, did a search with no results. handy calculator for bandwidth and storage.
a good read here too...pdf format on... NVR Camera Capacity based on Bit Rate from hikvision
http://www.stardot.com/bandwidth-and-storage-calculator
image quality and coverage...