Question about Sony SPP M920 Cordless Phone

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Sony SPP-M920 Trouble with the keypad. Some times pressed keys do not activate. Can't change from line 1 to Line 2, when line buttons pressed 3 appears in window. Have changed battery, light stays on but it does not charge.

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SOURCE: sony model spp-a941

it acts as if it cannot see dialtone. Try pluging in a known good working phone and cord into jack. if the known good phone works try just replacing the cord. and so on until you find the faulty element

Posted on Jan 22, 2009

  • 6771 Answers

SOURCE: My Sony SPP-930 cordless phone

The problem is in the main base, the cordless phone is unable to communicate with the base because it has stopped working that is why you are getting the four beeps. It is more cost effective to replace the complete phone system than repair. The only other possibility "and it is long short" unplug the power and the phone line cord from the wall and let it sit at least 30 minutes, this might reset the processor ic and get your system working again.

Posted on Jan 07, 2011

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SOURCE: I have sony spp m920.

If you are getting fragments showing up it is more than likely the driver ic or the display chip has become defective, you are further ahead replacing the phone because it is not a cost effective to repair let alone trying to find parts for it.

Posted on Mar 24, 2011

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I have RCA Dect 6.0 two handset keys locked on one. How do I unlock keys

Keypad lock To lock the cordless handset?s keypad: Press and hold [*] button for 2 seconds until you hear a beep tone, when the keypad lock is activated, shows on the display. To unlock the keypad: Press and hold [*] button for 2 seconds until you hear a beep tone. Or simply replace the handset on the charger cradle.
I'd put it back on the charger and see if that unlocks it.

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I have sony spp m920. I have had it for long time and it's really great. My problem is that the lcd on the handset is no longer working (it only shows fragments of numbers,etc.) this is the older model...

If the hardware/physical part is ok, then it must be the battery. Are there any screws to open the handset or a small compartment in the back where batteries may be?


Mar 24, 2011 | Sony SPP M920 Cordless Phone

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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.


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There are liquid repair kits available to restore the carbon buttons on the back of each key How to repair remote control Tutorial ReplacementRemotes com The video explains it and is also a source for the necessary repair kit.

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If I understand this right, you can not leave your base station off the hook this will cause the line to be activated. Just leave it on the hook.

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I lifted the handset off the contacts

May 10, 2008 | Sony SPP M920 Cordless Phone

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Broken handset

The weakness with the handsets was that women using hand lotion or hair gel can get it on the front of the keypad. It then works it's way to the back side of the rubber keypad. The oil gets on the powder carbon on the keypad. The Carbon shorts the copper on the phone to activate the #1 or #2, etc. When the oil mixes with the carbon the key no longer works. I replaced many keypads until Sony Supplies ran out.... A cheap home fix would be to open the handset and clean the #1 key and the circuit board. You can try the keys but if they don't have any carbon on them you can buy liquid carbon at Electronic Stores OR just paper punch a circle of alumimum foil. Glue the foil on the key with thin glue. Works....


Jan 03, 2008 | Sony SPP-A2780 Cordless Phone System

1 Answer

Sony SPP-M920

The numbers have rubber keys and on the back is a dry conductive carbon to short the keys.

To fix, you can try to clean it or glue a small piece of aluminum foil on bottom of the rubber pad. They sell a carbon coating in a small bottle too.


Jan 01, 2008 | Sony SPP M920 Cordless Phone

1 Answer


Presume you are talking about the extra handset. Try placing the extra handset in the "main" base for 5 seconds.

Aug 27, 2007 | Sony SPP N1025 Cordless Phone (spp-n1025)

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