Question about Sony IT M11 Corded Phone

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Sony corded phone IT-B4 wont work!

This beautiful phone worked perfectly for years and then i put it away and used another for a few years. i want to use it now and though its had no knocks or water etc it simply will not give a dial tone or work. i have taken the base panel off and the wiring and board inside looks in perfect order.

i note however that there is a lithium cell in it type CR 2032 which is hard wired into it. i am wondering if this could be "dead" or otherwise be the problem. any ideas gratefullly received. and thanks in advance.


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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: handset

I guess its time to get new batteries

Posted on Jan 01, 2009

  • 122 Answers

SOURCE: Replaced battery in handset. Got a dial tone and all was well. Picked up handset later in the day and it was dead. Unplugged and reattached everything - no luck.

Try taking batteries out, but also unplug base station. The aim is to disperse all power in the phone so that it resets itself. I would leave everything unplugged for 24 hours and then reassemble and see if the problem has gone. Its worked for me loads of times with different electrical appliances. Hope that helps.

Posted on Apr 23, 2009

  • 43 Answers

SOURCE: problem with my handset identifying base phone

I can help you register the handset if it is functional. I am a former Sony Tech.

Hand lotion gets on the keypad and into the back of the rubber keypad. There is a conductive carbon on the back of the keypad to short the circuit board when you press the key. Oil makes it stop working.

Parts are no longer avaliable but you can glue a small piece of alumimum foil on the rubber.

For Register Handset Error email me I will walk you through the steps.


Posted on Jul 31, 2009

  • 9 Answers

SOURCE: cannot use with another phone on the line

This sounds like a polarity issue in the new home.
I think you hace red and greed reversed somewhere in the telephone wiring. All greens should go together as all reds. If it is newer wiring the colors will be different, but the same rules apply. example: blue/white and white/blue striped wires will be one pair, it is easy to get then reversed if you are not careful.
Another possibility is there could be two incoming phone lines that are crossed with the red (or blue white) paired with the green (or white blue) from another incoming line.
The 2nd line should be on the black/green (orange/white pair)

Posted on Aug 25, 2011

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Try putting the phone in a very warm dry place, ay in the "Hot water cupboard" for a day or so and this may drive out any moisture that may be causing the problems, also shake the phone vigorously B4 you do so to try and dislodge any moisture. Or you could try disassembly and wiping the keypad contacts, perhaps there is still moisture there, or maybe it has shorted something else which is why ya gotta dry it out completely.

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