What you'll notice
The picture is cropped, stretched, fuzzy, or the menu bar sits off-screen.
Why it happens
Recorder output and panel native resolution mismatched, or overscan enabled on a TV input.
How we fix it
Match the output to the panel's native resolution and set the TV input to a PC/just-scan mode — small settings, dramatic difference in readability of plates and faces.
Still not working?
If the checks above haven't restored your monitor, this usually needs a technician. Our CCTV Repairs service covers exactly this fault.