Uniden TCX905 charger not charging

SOURCE: how to set up uniden phone to base

If the handset has previously worked with the base - press the hangup button and the # key at the same time on the handset for five seconds and follow the prompts to deregister the handset. (System reset - deregister HS - which handset) It will tell you that the handset is deregistered. Then put the handset onto the base and it will register the handset.

SOURCE: Uniden PowerMax 5.8 no audio transmission on two of three remotes

If phone is more than 1 yr. old, battery needs to be replaced, if not reset base by disconnecting power, pressing and holding delete key while reconnecting power.

SOURCE: No dial tone and base is constantly flashing red

http://www.uniden.com/products/productdetail.cfm?product=ELBT595

Here is the link to the manual...

But have you tried:
1. charging the unit for 10 hours?
2. registering the handset?

Register expansion handsets to the main base
Before the expansion handset is registered, the battery pack MUST be charged for 10
hours.
To register an ELX500 handset, simply place it in the main base.
To register a TCX860 handset, follow the steps below:
1) From the base, press menu/select and select S y s t e m
S e t u p menu.
2) Select R e g i s t e r H a n d s e t, and press menu/select.
3) On the handset, press and hold # until you hear a
beep.
While the handset is registering, H a n d s e t R e g i s t e r i n g will appear in the LCD. When
R e g i s t r a t i o n c o m p l e t e . is displayed, the handset has been registered to the base. If
R e g i s t r a t i o n f a i l e d . appears, please try these steps again.


Customer Hotline at 1-800-297-1023. (Mon - Fri 7 am to 7 pm,
Sat/Sun 9 am to 5 pm, CST. Phone support is closed on holidays.)

SOURCE: Uniden TRU 8885 - "Welcome, Please Wait" message on base

Try leaving the unit unplugged for a few minutes and power it up. There can be power surges during an outage that can damage the chips holding the software that loads.

SOURCE: NEW UNIDEN DECT6.0 [CHRISTMAS GIFT] WATERPROOF,

I am guessing you have a DECT WXI2077, If there is a popping sound coming from the charger I would disconnect it. You can call Uniden Customer Service at 1800 297-1023 and they will send you a new charger if you have a receipt showing the phone was purchased less then a year ago.