Wiser2 stopped connecting to the CBus network

Everything has been working for a few years.
Recently a few switches would randomly have a button turned on, always the same buttons.
Sometimes on some switches if you pressed a button the led would just flash and not turn on the light.
Over the past few weeks this happened with a few different switches.
They eventually started working again without doing anything.
On this occassion I loaded Toolkit and resaved the switch and it then worked.
Due to the randon buttons being set, I started up Piced and resent the project to the Wiser2.
After booting, it would not connect to the CBus network.
The CBus light on the Wiser2 was red.
I have an older Wiser2 which I had previously done a factory reset and plugged it in.
It connected to the CBus network.
So, I did a factory reset on the Wiser2 that was in use and plugged that in, it also now connected to the CBus network.
So I again started up Piced and sent the project to Wiser2, after booting, it would not connect to the CBus network.
I then plugged in the old Wiser2 (factory resetted) and it connected to the CBus network.
I decided to have a look at some switches.
I disonected 8 of them and then plugged in the Wiser2 which has the project loaded, still would not connect to CBUS.
I then had a closer look at those switches and a few of them had 1 broken wire, 1 was on the + connector and the other switches had a broken wire on the - connector.
I fixed those (except for 1) and reconncted them all.
The Wiser2 with the project still would not connect to CBus but the factory resetted Wiser2 would still connect.
I still have about 13 or 14 others still to check.


So, as an interim step, I am running the project on piced whcih is connected to CBUS.

Any thouhts or suggestions would be appreciated.