Bt8500 trio handset not working

[caggym]

Nothing has changed but my 2 extensions have stopped working. Base still ok for incoming calls and making calls. I try to ring extension and it fails. If main phone calls the extension ones don’t.  One of them comes up test and then flashes if you take it off cradle. Can’t go to menu as won’t let me

not had a problem in past, have found it reliable. As I work from home I am finding this very inconvenient.

any ideas please

[Keith_Beddoe]

@caggym 

Welcome to this user forum for BT Retail phone and broadband customers.

Have you tried turning off the power to the base unit for about a minute?

[caggym]

No. I’ll try it

[rbz5416]

Possibly batteries. If you don't have replacement rechargeables to hand, try regular alkalines just to test. But don't put them on the charging base with alkalines installed.

[caggym]

Says handset not available when I try to ring from base phone. 

[caggym]

Batteries were replaced a little while ago so pretty sure it’s not that

[Keith_Beddoe]

@caggym 

What happened when you turned the power off to the base for a minute?

[caggym]

All the lights went off then when I turned it back on it said wasn’t connected to base, then a message about power cut, then it synced itself. I had to check the time and date 

[Keith_Beddoe]

Thanks, so it did not fix the problem.

I think you will probably need to speak to the product helpdesk.

Product helpdesk information

If your phone is within warranty:

By phone: 0800 145 6789

Monday to Friday 9.00am to 5.30pm, Saturday 9am to 2pm

By email: Click here for email support

If your product is out of warranty contact BT's recommended agent

By phone: 0800 980 8999

Spares information

Replacement parts, including batteries, line cords, additional handsets, etc, are available from the product helpdesk.

[rbz5416]

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@caggymwrote:

Batteries were replaced a little while ago so pretty sure it’s not that

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The charging circuits in these phones are awful, so if the handsets are rarely used for extended periods or left off the charger, thee batteries are killed. Your call but I'd swap them for alkalines, just to test.