It seems that even dropping the lease to 1 hour is not fixing the problem.
I need a better solution, preferably $0, they are a charity without much to throw around. Pretty much all their equipment has been donated.
From memory....
They have the HG659b as the primary router, doing DHCP, connect to ONT, Wifi 2.4 and 5GHz , and connected wired pc's and printer.
The phone is connected directly to the ONT.
There is a HG630b (cabled directly to the HG659b) in the building next door providing wifi 2.4GHz access to the HG659b.
An old ADSL TP-Link router they used quite happily before fibre was installed, sitting in a box looking smug.
I have a slightly less old ADSL/Cable TP-Link router I can use if necessary.
I'll be popping in tomorrow, is there anything worth doing with whats on hand?