Table 7-4. No DC Power Cause Action No AC power is supplied. Check the AC power supply. See Table 7-3, “No AC Power,” on page 7-9 The overcurrent/overvoltage detection circuit activated. If the problem is not rectified after the power switch is turned off and on again, find the cause of activation of the overcurrent/overvoltage detection circuit in the power supply. Wait for more than two minutes before turning the printer back on. Blown fuse. 1. Check the fuses (FU1 and FU2) on the Engine Controller Board. 2. Replace the fuses if necessary. 7-10 Troubleshooting