Joke Collection Website - Mood Talk - How is there no signal in the self-service printer of hospital laboratory paper?

How is there no signal in the self-service printer of hospital laboratory paper?

There is no signal from the self-service printer of hospital laboratory sheets for the following reasons:

1. The inspection results have not come out yet, and no inspection report has been formed.

2. The self-service report printer has no printing paper, so it can't print reports.

3. The barcode is incorrect and cannot be scanned.