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HP Designjet 5000 and 5500 Series Printers - Front Panel Display is Blank, Weak or Fading

	Parts required (part numbers are subject to change)
	Troubleshooting steps

KRS document number: BPP90218

Last Updated: 22-Nov-2002

Minimum skill level: 2

The printer's front-panel display is blank, weak or fading. Common causes include the front-panel contrast being turned down, or the front panel display itself. Follow the steps listed below to determine the actual cause of the failure and to replace the appropriate parts.

Parts required (part numbers are subject to change)

Part description	5000 series models - C6090A/V, C6091A/V, C6095A/V, C6096A/V	5500 series models - Q1251A/V, Q1252A/V, Q1253A/V, Q1254A/V
Front Panel Assembly (Required)	Q1251-60262	Q1251-60262

NOTE: If Removal and Installation instructions are needed for reference during any repairs performed, refer to the 5000 and 5500 Series Service Manual available on the Computer Care Web site for review or download.

Troubleshooting steps

If parts are replaced or fixed in any of the steps listed below, attempt to verify printer functionality by turning the printer on and printing internal test prints. If functionality is verified, no additional parts should be replaced.

1. Turn the printer off, using the main power switch located on the back of the printer.
2. Turn the main power switch on.
3. Listen for internal printer operations (fans, vacuum, or movement).

NOTE: Ensure the printer displays some noticeable internal movement or noise before continuing with this document. If no response from printer is noticed when turned on (for instance, fan noise, vacuum noise, carriage movement) use the work instruction for No Power (bpp90157).

4. If internal movement or operations are observed, check the front panel contrast:
1. With the printer on, press the Enter key on the front panel.
2. Press the Down Arrow key two times (accessing the Utilities menu).
3. Press ENTER.
4. Press the Down Arrow key nine times (selecting Display Contrast).
5. Press ENTER.
6. Press the Enter key 10-15 times to increase the front panel contrast.
7. If the front panel contrast increases, verify printer functionality.
8. If the contrast does not increase, replace the front panel assembly (refer to pages 8-14 of the service manual).
5. Verify printer functionality.

Copyright Hewlett-Packard Co. 2002
This information is subject to change without notice and
is provided "as is" with no warranty.
Hewlett-Packard shall not be liable for any direct,
indirect, special, incidental or consequential damages
in connection with the use of this material.

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