Front Panel Test
The purpose of this test is to verify the operation of the front(panel keys and LEDs.
Perform the Front Panel test as follows:
1In service mode 1, press Front Panel Test (Form Feed Key).
If you are viewing information via the serial port, you will see output similar to the following:
1.- Front Panel Test
This message only informs you that the test has started, and a message will not appear if the test passes or fails.
2The test will start and all the LEDs will flash for 2 seconds after which they will all be turned OFF. Check that all LEDs are functioning correctly when they flash.
3To check that the front(panel keys function correctly, press them one by one. Each time a key is pressed, the Coated LED (LED I) will be lit.
4If a key is not functioning, the Coated LED (LED I) will remain OFF.
5The test continuously repeats itself until you press the Cancel and Media Source keys.
If the test fails, to resolve the problem, try one of the following:
1Check that the cable for the Front Panel Assembly is connected to the Electronics Module. Also make sure that the cable is NOT damaged or twisted.
2Replace the Front Panel Assembly ' page 8*12.
3Replace the Electronics Module ' page 8*13.
Service Tests | HP DesignJet 430, 450C and 455CA Printers |