This topic

Bt8500 trio handset not working

caggym — Mon, 11 Dec 2023 09:14:03 GMT

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

Re: Bt8500 trio handset not working

Keith_Beddoe — Mon, 11 Dec 2023 09:16:27 GMT

@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?

Re: Bt8500 trio handset not working

caggym — Mon, 11 Dec 2023 20:39:49 GMT

No. I’ll try it

Re: Bt8500 trio handset not working

Anonymous — Mon, 11 Dec 2023 20:58:15 GMT

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.

Re: Bt8500 trio handset not working

caggym — Tue, 12 Dec 2023 11:25:03 GMT

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

Re: Bt8500 trio handset not working

caggym — Tue, 12 Dec 2023 11:30:42 GMT

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

Re: Bt8500 trio handset not working

Keith_Beddoe — Tue, 12 Dec 2023 11:36:40 GMT

@caggym

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

Re: Bt8500 trio handset not working

caggym — Tue, 12 Dec 2023 11:39:08 GMT

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

Re: Bt8500 trio handset not working

Keith_Beddoe — Tue, 12 Dec 2023 11:46:12 GMT

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.

Re: Bt8500 trio handset not working

Anonymous — Tue, 12 Dec 2023 12:03:07 GMT

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

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.

Re: Bt8500 trio handset not working

caggym — Tue, 12 Dec 2023 16:07:26 GMT

How strange. Yes works when I swap the batteries for alkaline. So it looks like I may have had new dodgy batteries?

what ones would you recommend

Re: Bt8500 trio handset not working

Anonymous — Tue, 12 Dec 2023 17:27:14 GMT

@caggymwrote:
what ones would you recommend

I doubt it makes much difference to be honest. The problem is the phones, not the batteries. Amazon Basic are probably as good as any. £10.82 for a pack of 12 currently under item number B07NX1DSMP.

Funnily enough my phone rang this afternoon for the first time in months & the batteries died the minute I lifted it from the cradle. I've had many makes in them & they all die without regular use/discharge.

I do have an intelligent battery charger that can sometimes refresh them. I really ought to just cycle them for other sets but never remember.

So best option is probably to buy some additional spares & occasionally completely discharge the ones in the handsets by putting them in a torch, radio or similar.