A cordless handset on a Radio Shack ET-3580 5.8GHz
Expandable System is having issues.

The handset powers up and still plays ring tones, but the
display has no read out (it is blank except for the working
backlight). Also, there is no dial tone.

This is handset model ET-3581 #43-3581 or 430-3581. This
handset works with the following Radio Shack 5.8GHz: 43-3880
or 43-3580 Expandable Systems. The unit is Champagne color.

It's a discontinued model so store exchange is not an option.

IMAGE:
http://www.amazon.com/Digital-Access.../dp/B000GF3BVO

OWNER'S MANUAL:
http://www.radioshack.com/graphics/u...3581_PM_EN.pdf

All ideas or suggestions are welcome. Thank you very much.