Question about British Telecom Synergy 2110 Cordless Phone

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BT Synergy 3505 LCD Display failing!

Help! Both my Mum & I have the above phones, we have it with answerphone & additional handset, and she has 3 handsets. We have had the phones for about 4 years, and are really happy with them. owever, in the last few months we have both noticed that the LCD display is failing - and we can't read who is calling! Neither of us have replaced the batteries, and were wondering if this is the problem. However, my mum phoned the BT helpline yesterday and was told by one person that she simply needed new batteries, and then when she phoned back to order them was told that new batteries won't solve the problem, and the phone is just old. Please help!

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  • jackie816 Oct 19, 2008

    The same thing has happened to one of my handsets. Even with new batteries, there is nothing on the display, it doesn't beep when it's put on the base station, and it doesn't work.

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2 Suggested Answers

  • 1 Answer

SOURCE: set time and date on bt synergy 3505

to set the time the instructions are on page 9 of the instruction manual in the getting started section.

in case you no longer have the manual....

1. press the tick/menu button twice.
2. press 0 and you hear 'to set the day and time press Star, to hear the day and time press Square.
3. press star. you hear 'please enter new day and time after the tone' enter the day (1=sun, 2=mon etc) enter the time using 24hr clock.
4. press the X/security button twice to exit.

hope this helps.

Posted on Oct 28, 2008

  • 1 Answer

SOURCE: base unit on bt synergy 3505 keeps beeping and

If the handset displays 'Searching', 'Base' or 'Range out' on the screen, this indicates that the handset has lost its link with the base. The following procedure should be followed to help resolve the problem:

  • Confirm that the power lead has not been inadvertently disconnected from the base.
  • Ensure that the handset batteries are correctly installed and are fully charged.
  • Ensure that the handset and base are within range of each other.
  • Switch the mains power off, wait five seconds and then turn it on again. This will reset your product.
  • Carry out a reset procedure on both the handset and the base to return the settings back to the factory default. Your user guide will guide you through the correct procedure.
  • If none of the above remedies solve your problem, please contact the helpdesk.

Posted on Apr 05, 2010

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Base unit on bt synergy 3505 keeps beeping and handset keeps displaying base 1 and losing signal.... intermitent fault....have changed batteries in handset and switched unit on and off but still not...


If the handset displays 'Searching', 'Base' or 'Range out' on the screen, this indicates that the handset has lost its link with the base. The following procedure should be followed to help resolve the problem:
  • Confirm that the power lead has not been inadvertently disconnected from the base.
  • Ensure that the handset batteries are correctly installed and are fully charged.
  • Ensure that the handset and base are within range of each other.
  • Switch the mains power off, wait five seconds and then turn it on again. This will reset your product.
  • Carry out a reset procedure on both the handset and the base to return the settings back to the factory default. Your user guide will guide you through the correct procedure.
  • If none of the above remedies solve your problem, please contact the helpdesk.

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1 Answer

I have a bt synergy 2110 cordless phone. There are 3 lights on the right hand side. one for power/in use, one for charging one for new call . All3 are lit up. How do i get the "new call " light to go out...


I may have a solution you can try.

1. Take handset out of cradle.
2. Press and hold bottom, right hand side, bottom button, marked "Calls"
3. Hold until "Display" shows number of calls, usually 10 and makes a bleep-type noise.
4. Now press top left button, marked "Del" in red, until the display scrolls through all 10 numbers and deletes all the numbers stored in the memory. The phone should then make a bleep noise.
5. Press "red handset symbol" (finish call) twice.
6. Replace handset onto cradle and the "new call light" should go out.

You should now be able to make calls.

Good luck !!!

Nov 27, 2008 | British Telecom Synergy 2110 Cordless...

1 Answer

Set time and date on bt synergy 3505


to set the time the instructions are on page 9 of the instruction manual in the getting started section.

in case you no longer have the manual....

1. press the tick/menu button twice.
2. press 0 and you hear 'to set the day and time press Star, to hear the day and time press Square.
3. press star. you hear 'please enter new day and time after the tone' enter the day (1=sun, 2=mon etc) enter the time using 24hr clock.
4. press the X/security button twice to exit.

hope this helps.

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http://www.shop.bt.com/content/uni2/documentation/43py/023626.pdf

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No Dial Tone


I have found this free link on BT site for you
http://www.shop.bt.com/content/uni2/documentation/498n/025455.pdf

If the second handset works ok on the base and the first handset doesn't, then you are right...the fault lies with the first handset. There are batteries ( special type ) in the handset, it sound as if either the batteries are dead, or not charged ( try charging them for 12 hours on the good base station ) or the connection is bad.

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