Base Unit of DECT2000 Uniden Phone system (5 Handsets) went dead
We purchased this phone system 4 months ago and the base unit handset died yesterday! It will not charge and will not power up at all. After sliding open the battery area, discovered that the battery was warm to the touch. The base unit indicates that the phone is charging..... Thank you! Kathy from Granville
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When a handset is reading "Searching", it can't communicate with the base. First, check if the base station is plugged into a live outlet. (Try plugging the base into a different outlet or making sure that the circuit breaker hasn't popped. I had a cordless phone base plugged into a UPS. During an extended power outage, the UPS was turned off. The phone didn't work until someone noticed and turned the UPS back on.) Move closer to the base station.
If this was an extra handset purchased later, make sure it is compatible with the base station. The Uniden DWX207 works with the DECT1500, DECT2000 and DECT3000 series bases. Register the handset with the base. The registration procedure depends on the base station. If the base unit has an LCD screen, with the phone in standby, press Menu/Select and press the down arrow to reach "Register Handset". Then press Menu Select again. (If the base doesn't have an LCD screen, unplug the power cord. Then hold the Find HS or Find button as you reconnect the power cord until the Charge/In Use light starts to blink.) Then press the # key on the handset before the registration period ends.
Make sure that you haven't exceeded the number of handsets for your base. You may need to de-register all handsets and then re-register them.
If no handsets will pair with the base, replace the base unit. The transmitter or the receiver aren't communicating properly with the handsets.
I just got off of the phone with Uniden for the same issue with my D1680-4. The alternating "8" - "88" code is an indication that the base is dead. They will be sending me a new base (and 2 handsets). During the call I learned that if you do not have a receipt, Uniden warrants their phones for up to 15 months. The advertised 12 months, plus 3 months for the product to get from manufacturing, through distribution channel and finally sale to the consumer.
Just unplug the base unit from AC wall power socket for a while, say for about 5 minutes or so, replugh the base unit to power socket again. Place each handset on it and synchronise it with the base unit. As you put it on, you will hear a beep sound. Now the ahndset ahs been synchronised with base unit. Do this for the other two handsets. OK.
If the handsets are not currently registered to any base, the SYSTEM RESET menu won't appear.
If the TCX905 handsets in question are actually expansion handsets from another Uniden Phone System, they are not true TCX905 handsets. To verify, remove the battery cover and battery, then look at the inside label. If it lists the model of a TRU9xxx phone system, your handsets are NOT TCX905.
Uniden unfortunately has programmed the expansion handsets from SINGLE LINE TRU9xxx phone systems to NOT REGISTER against the TRU9466. (Those same handsets register fine against predecessor model TRU8866 though).
In order to re-register handsets with TRU8866 base unit, you have to reset the base unit, de-register the handsets, and then re-register the handsets. To reset the base station, disconnect the power from the base and then press and hold the CID, Intercom, and Exit keys while you connect the power. Wait for the beep, and let go of the keys. Now re-register the handsets - the first one will become #1, and so on.
No. This model of phone can only support 4 handsets. If you need more than that, you will need to have a second base unit.
One of my handsets went bad, and I just bought complete DCT748-4 package from a seller on eBay for a very good price. This set was used, but in very good condition. I didn't need the whole set - just one handset - but like I said, it was a good price. Anyway, I began by telling my old base unit to de-register handset #2 (the failed unit). However, I then found that I could not register the "new" handset with my old base unit because it was already registered to the "new" base unit. So, I first had to apply power to the "new" base unit and de-register the handsets. Then, I placed one of the "new" handsets onto my old base unit, and it said "Handset Registering ..." and registered just fine. Just for the fun of it, I placed one of the other spare handsets into my old base unit. It said "Hanset Registering ..." but then it beeped and said "Registration Failed." This is because I already had 4 handsets registered to my base, and the base can not handle a fifth handset.
1. First, remove the battery cover on your unregistered TCX905 and look
under the battery to confirm that you indeed purchased a TCX905 because
some Uniden handsets were packaged as 905's but were not.
2. Take the fully charged unregistered 905 to the base unit TRU9496.
3. On the TRU 9496 base unit press "Menu" then select "Registration" and press OK
4. You should get the message "press the # key on the remote handset".
5. Depress the "#" key on the unregistered 905 and it should register.
if battery just replace battery but the head sets are compatible with other handsets of same ghz say 2.4 you just gotta set in base and let base recognize new hand set these phones are practically built the same way but only with new technology
Same manual as lethean provided on a similar post but Page 24 if the previously used Base is Unavailable and your phone shows "Deregistration" in the Menu.
Base Unavailable (Handset Only)
To clear the base registration data in the handset, please follow these steps:
Press and hold  and [#] for more than 5 seconds. Select the BASE UNAVAILABLE submenu.
BASE UNAVAILABLE appears. Move the cursor to select YES, and then press the OK soft key.
ARE YOU SURE? appears. Move the cursor to select YES. Press the OK soft key.