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If the phone is working, then the battery in it is working.
(This is of course, a reference to the portable or cordless handset. The corded phone has no battery in it for its display. So whichever one you are referring to, the corded or cordless phone in that model # - it is expandable you see - the battery is not at fault.)
The display is probably bad.
How old is the phone? has it been in storage for some time, perhaps?
(I regret that I am not able to offer Live Phone Call service at this time; However, your request is still open to other Experts in this category, and one of them may pick up on it at any time.)
OK, at 4 years old, it is out of warranty for certain, and also reasonably old.
I'm sorry to say that the display backlight may have failed, or burned out.
Would you wish to try doing a total settings reset of the phone ?
I am looking up information on that point. Please give me 10 or 20 minutes (I have a few other customers to help also just now, you understand...) and I will post again with info... if there is such an approach to this problem.
I have to ask - is the display that is not lit, on the cordless phone, or the corded phone?
Thanks for clearing up that point.
I'm continuing to look for information.
I thought it might be the display brightness turned down. But the information I have says there is a display contrast adjustment but no display brightness adjustment nor control.
(Look for one nonetheless - it might be a small rotating control on an edge of the phone's base unit, perhaps. It might be not mentioned in the documentation I have.)
As for a reset of settings... since the only setting that is listed for the display is the Contrast (and no setting for brightness) then that is no matter. Also, I cannot find any such reset listed or mentioned anywhere, I'm sorry to have to report.
That might be a good idea.
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