hikvison dvr seems to be not working, not sending images

hi everyone i need some help i have a hikvision set with 8 cameras, all set up and working for a few years, from friday evening we cannot see any images at all, both using the app, just saying connection failed. I did try connecting a monitor up via VGM and that wont show a picture at all. Im assuming its the DVR not working, but without buying another its hard to figure out if its that.



i have the hikvison DS-7208-HWI and using IVMS 4500 app on my phone.

any suggestions, ive turned...

hikvison dvr seems to be not working, not sending images