It depends of your height.
Until 200 ft you can loose loc/gs signal or 7 second without caution or degradation of your landing capability. After this time you have a degradation of capability.
Below 200 ft one (or two) red NO AUTOLAND light comes up and if you don't have adequate ground references you have to go around.
I try to semplify as much as possible the system; I don't know if I was able to do it
ciao