One time, my husband and I were invited to play for the Historical Society. And since he’s challenged about hearing chord changes, I prepared the entire concert with a software that would show him when the chord changes, and how many times to play the chord, and play the backup track so we’d stay together.
The concert was outside, in East Texas, on a summer day. And my laptop thought it was too hot and wouldn’t power up. It just kept shutting back down. So I played the entire concert alone, and he sat there like a bump on the log with the autoharp in his lap.
Afterwards, the Historical Society folks couldn’t thank us enough. In their minds, it was a great effort and the worst possible thing never happened. People appreciate your efforts – no matter what happens.