HP 510 Inkjet Large Format CH336A#B1K manual Using the Power Switch LED to Troubleshoot

Troubleshooting

	Using the Power Switch LED to Troubleshoot
	In certain circumstances the LED located in the power switch
	(located on the left hand side of the Printer) can help to troubleshoot
	the Printer. The LED can be OFF, ON or flashing and using different
	combinations can indicate different problems.
	You should only use the LED to troubleshoot when the Printer
NOTE
	does not Power up completely. The LED may flash in other
	circumstances which are completely normal and this does not
	mean that there is a problem with the Printer.

LED OFF LED ON

LED is OFF - This indicates that the Power Supply Unit is completely dead. Try the following:

1Check that power cord is connected correctly to the Printer and to the Power Socket. Also make sure that you firmly press the Power Switch to the ON position.

2Replace the Power Supply Unit ⇒ Page 8-27.

LED is ON (all the time) - This indicates that the Main PCA is completely dead. Replace the Electronics Module ⇒ Page 8-24.

LED is Flashing continuously - A problem has been detected with the previous firmware upgrade. Try resending the firmware upgrade file.

LED Flashes twice every few seconds - The Printer cannot detect

HP DesignJets 500, 510 and 800 Series Printers Service Manual 1-11