BT 8500 how to de-register handsets, if I don’t have the handsets?

[bee2tee]

I do have one handset that I want to de-register, but it says “No link to base, please check base.”, and it won’t let me de-register.

[FLC]

That suggests it's already de-registered.

But you can also de-register from another handset. When you go through the process it asks you you which handset you want to de-register. If all else fails, try factory resetting the handset.

[bee2tee]

No it was working, and just stopped working, and if I try registering it says no connection to base,

When trying to de-register on another handset, there is no question about which handset, just “register” or “de-register”.  I didn’t want to de-register a good handset, so I tried re registering it, and it said go to the “find” button on the base, I pressed it and after a while it just peeped, there was no option to select a handset.

[FLC]

You get the option when you select de-register, as detailed in the manual.

[bee2tee]

Thanks.

Everything goes wrong for me at the moment, so I was very reluctant to select “De-register”, in case I lost another handset.

However, I don’t really know why, but I decided to try removing a battery from the handset that couldn’t connect to the base, and then put the battery back in, and then amazingly the handset appeared to be able to talk to the base, albeit it needed charging because it had been off the charger for around 2 hrs!  Then today I phoned it from a mobile and that handset rang.

Having now got an “additional” handset, I then felt more at ease about trying to “De-register” a handset, and tried it on the one that  previously couldn’t connect to the base, and as you indicated, I followed the instructions and I appear to have de-registered 2 handsets, ie they no longer appear in the list of handsets to de-register.  I am not sure if, as in point 6 in the manual, the display said “De-registering handset”, but those 2 handsets are broken and so are not actually connected to the base so the base couldn’t talk to them anyway.  

Perhaps it will be worth putting new batteries in the handset that previously couldn’t connect to the base.