Is there a way to test the scanner for failure?

Yes, it is possible to test a scanner for failure by scanning up to 2000 words. One way to do this is to print out a sheet of paper with 2000 words written on it, scan the paper into the scanner, and then compare the scanned version of the document to the original. If there are any discrepancies between the original document and the scanned version, then the scanner may be failing. Another way to test a scanner for failure is to use an OCR (Optical Character Recognition) software program. OCR programs can detect errors in scanned documents, including missing or wrong words, which can indicate a failed scanner.