5. Make sure that the formatter is seated and operating correctly. Turn off the product and remove the
formatter. Reinstall the formatter, make sure the power switch is in the on position, and then verify that
the heartbeat LED is blinking.
6. Remove any external solutions, and then try to turn the product on again.
7. Remove any external solutions, and then try to turn the product on again.
8. If the control panel display is blank, but the main cooling fan runs briefly after the product power is
turned on, try printing an engine-test page to determine whether the problem is with the control-panel
display, formatter, or other product assemblies.
a. Remove the formatter.
b. Use a small pointed object to depress the test-page switch located on the rear of the product.
NOTE: The test page can only use Tray 2 as the paper source, so make sure that paper is loaded
in Tray 2.
c. If the engine test page prints, the print engine is operating normally (a failed engine test print
page does not necessarily indicate that the print engine or DC controller is defective).
9. If the print engine appears to be correctly operating (the engine test page successfully printed) and the
control panel is still blank, replace the low-voltage power supply (LVPS)
10. If after replacing the LVPS normal startup noises and lights are still not present, replace the DC
controller.
NOTE: If the error persists after replacing these assemblies, escalate the problem to the Global
Business Unit (GBU).
128 Chapter 2 Solve problems ENWW
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