Appendices 123Chapter 43. TroubleshootingThis section describes the possible problems that might occur during use of thescanner and how to solve them.The Scanner Does Not Turn ON ......................................P. 123The Scanner Is Not Recognized(Connecting via USB) .......................................................P. 123The PC Does Not Recognize the Scanner(Connecting via SCSI) ......................................................P. 124Scanning Is Not Performed..............................................P. 126Slow Scanning Speed (Connecting via USB).................P. 126Documents Do Not Feed Properly...................................P. 127Saved Image Files Do Not Open......................................P. 128Scanning Results Are Not as Expected..........................P. 129If, after consulting this section, you still cannot resolve the problem, contactyour local authorized Canon dealer or your service representative.The Scanner Does Not Turn ONCheck the following if the scanner does not turn on:• Is the power cord connected correctly?• Is the power cord inserted into the power outlet?For details on connecting the power cord, see “Step 4. Connecting the Scannerto Your PC,” in the Easy Start Guide.The Scanner Is Not Recognized (Connecting via USB)The following are possible causes of the PC failing to recognize the scanner.Check each possible cause.Problem The scanner is not correctly connected.Solution Make sure that the scanner and the computer are correctlyconnected with the USB cable. (See “Step 4. Connecting theScanner to Your PC,” in the Easy Start Guide.)Problem The scanner power is switched OFF.Solution Make sure that the scanner is switched ON. If the scanner is OFF,turn the scanner ON. (See “Step 4. Connecting the Scanner toYour PC,” in the Easy Start Guide.)