Hello & Welcome to Just Answer,
I'm Greg and will do my best to assist you today.
Sorry I didn't see your question earlier and to hear of any issue you are having with your phones.
To help you with this issue, may I ask:
1) The FULL Model Number of the phone system you are working with? Since this is a cordless system, that model should be printed on a sticker on the bottom or back of the MAIN base and START with KX-TG.
NOTE: I suspect the number you have there is KX-TGA101B (where the last character is a "B"), and that is for one of the CORDLESS handsets.
2) How many TOTAL cordless handsets do you have with this system, and if more than one, do ALL handsets have this issue?
3) Can you still answer calls and have conversations with this handset?
Please REPLY using the box below.
No worries about being offline.
If you haven't already tried NEW rechargeable batteries (fully charged) in this one handset, OR swapping the batteries with the WORKING handset, that is the first thing I would try.
BUT, if the display is ON, but no letters or icons are showing (like the working handset), then the display or circuits that drive it may have failed.
Since this system is past its 1-year warranty period, I suspect it would cost much more to repair this handset than to replace it - with a "used" handset of the same type.
I have a link below to an Amazon listing, where there are NEW and USED handsets of this type listed. You may want to take a look at both and see what suits you best.
Click here --> http://amzn.to/2cRn8Rw
NOTE: Once you have the handset, it will need to be "registered" to the base unit, so that it will operate properly. If you need help with that, let me know the model of the MAIN BASE of the system, and I can give you those steps.
Please let me know what you find with the battery change/swap, or if you have any more questions.
If this has answered your question(s), please take a moment to rate MY service level (5-star is my goal) so that I get credit for my time helping you with this question.You should see some "stars" to do that, and a SUBMIT button, but please let me know if you do NOT see them (you may have to scroll UP or DOWN) or can not use them.
Thanks, ***** *****--. .-(im)
OK - that would CONFIRM that the display circuits have failed, and replacing the handset would be the next step.
This assumes that you want to KEEP this system and not replace it with a newer model. I only mention this because sometimes a newer model - with multiple handsets - can be less expensive than replacing a single handset.
Here is that link again to Amazon, where replacement handsets are listed.
Please let me know what you find or if you have more questions.
Thanks, ***** *****