I had the same problem with my sony ericsson all i did was took the casing off then the battery and simcard put it in a dry hot room etc boiler room for a couple of days then i left it on charge now it works fine
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If you want to replace a handset or re-assign the designated handset number of a registered handset, you must de-register all the handsets and then individually register each handset.
To de-register all handsets:
Press and hold
on the telephone base for about 10
seconds (until the IN USE light on the telephone base turns on and starts to flash), then release FIND HANDSET
Press and release
FIND HANDSET again. (You must press FIND HANDSET
while the IN USE light is still flashing. The IN USE light flashes for
approximately seven seconds.)
All system handsets show
The de-registration process
takes about 10 seconds to complete. All handsets show
when the de-registration completes.
If de-registration fails, you might need to reset the telephone and try again.
Pick up the registered handset and then press
and place the handset back in the telephone base.
Unplug the power from the telephone base, then plug it back in.
You cannot de-register a handset if any system handset is in use.
After de-registering, proceed with registering process:
If the handset screen does not show LOW BATTERY
or HANDSET X, you will need to charge the handset for at least five minutes before registering to the telephone base.
To register a handset:
Place the unregistered handset in the telephone base or charger. If
PRESS FIND HS 4 SEC ON BASE
does not appear on the handset screen after a few seconds, remove the handset and place it in the telephone base or charger again.
On the telephone base, press and hold
for about four seconds (until the red IN USE light on the telephone base turns on) and then release the button. The handset shows
and it takes about 10 seconds to complete the registration. The handset shows
HANDSET X REGISTERED
(X represents the handset number assigned)
and you hear a beep when the registration completes.
Sometimes an easy solution to this is to turn off your laptop completely, remove the power lead from the socket and the laptop, then remove the battery, leave for a couple of minutes and then try again.
If this does not work, then you are into the realms of programming / restoring.
I hope this helps you, Chris
Dont worry I have also faced the same problem. Remove your battery & sim card after 10-15 minutes set them again. Switch on your mobile it will again appear white. Leave the phone, dont touch. After some times it will automaticly on.
Fixed:) Ok so I bought 2 extension handsets from different people off of Ebay, both new. First one wouldnt register or would say incorrect pin (0000). So I tried the second one, same thing. Here is what I did: When attempting registering, make sure the handset is physically on top of the main base station, IE charging. Start the registration process on the handset and press-hold (dont let go) the locate handset button instead of press and hold for 3 seconds (like the manual says to). If that didnt work, I removed the batteries and tried pressing and holding the same button for 3 seconds, then release. Wait 10 seconds, then press and hold for 3 seconds. Repeat. If the handset timed out and went back to the main unregistered instruction screen. I took the batteries out and tried again. It was a bit of trial and error but each cycle I removed the batteries to reset the handset. First extension handset took 20 minutes of head scratching, the second 2 minutes. Hope this helps someone. The build and sound quality on these units are great, the tech support....not so much.