433MHz RC Transmitter and Receiver button not receiving

Using Arduino General Electronics
1

The same sets Transmitter (T) and Receiver (R), same software and used to works well.

suddenly one button's signal can't be received and all other buttons works well, should be the one button broken? but the serial monitor shown that one's signal was sent.

what can be ?

Thanks

2

We can't see your code or your schematic.

3

AWOL:
We can't see your code or your schematic.

Thanks,

I didn't post that stuff cause of it is really no relation with them. The sets was working well, and thing happened suddenly.

I just wonder if some body met the similar situation.

4

just wonder if some body met the similar situation

Yes everybody has.
Something has changed.
That is about as far as my mind reading goes.

Only you have the eyes to see and the hands to change and make voltage measurements.

So it is up to you to post code, schematic and photograph if you want some more detailed help.