User’s Manual7. Trouble shootingThe scanner will automatically perform a simple self-testeach time it is turned on. This will help spot major systemerrors in the scanner itself.When the test is initiated, the READY LED is flashing. Whenthe test is completed, if no error occurs, the READY LED issteadily on.If you have problems with th oper tion of your scanner,please check the following o bleshooting hints..1 Question and AnswerQuestion: The LED indicates that the scanner is ready,but the scanner does not respond to thescan command from the host computer.Answer: a) Please check if the signal cable is firmlyseated, and invoke the scan commandagain. If there is still no response, pleasereset the scanner by turning it off and thenon again, and reboot your host computer aswell.b) Check if the driver is correctly installed.e atr u77-1
