Make sure you are using the latest Eztrends. Also make sure the correct COM number used by your cable is also used in the ‘Port Name’ field of Eztrends ‘COM Port Detection and Selection’ window.  Make sure the EDM itself is ‘counting down’.   Do not use Belkin, Dynex or IOGear USB serial adapter cables. If all is correct as above, then proceed by checking the download port and serial cable.

To check center pin on download jack:  Should have around a -7 to -9 volts. You can plug in the black PC serial cable and check this. Pin# 2 is signal and pin# 5 ground. Put paper clips in these two pins for your digital voltmeter. Now get the EDM to DUMP ALL and tap the Step button. You should see this neg voltage(-7 to -9) go toward the more positive side – even a positive number. It should fluctuate. This will show that the jack and PC serial cable are good. The issue now is with the USB adapter cable(if not one of the above mentioned) or the computer.