The TWI Designjet Documents library presented here as a courtesy  of   ComputerCareOnline.com  

HP Designjet 500 and 800 Series Printers - TWI: No Power

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

KRS document number: BPP90117

Last Updated: 24-Aug-2001

Minimum skill level: 2

The printer is not responding when powered on. The most common causes of this issue are poor cord connections, poor power source, or a faulty power supply in the printer. A faulty Electronics module can also cause similar symptoms. Use the step 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	Designjet 500 Models - C7769B, C7770B, C7769C, C7770C	Designjet 800 Models - C7779B, C7780B, C7779C, C7780C
Power Supply (Required)	C7769-60145	C7769-60145
Electronics Module (Required)	C7779-69144	C7779-69144

NOTE: If Removal and Installation instructions are needed for reference during any repairs performed, refer to the 500/800 Series Service Manual.

Troubleshooting steps

1. Disconnect the printer from any surge protectors, universal power supplies or other similar devices and connect the power cord directly to a wall outlet.
2. If unsuccessful try another wall outlet.
3. Try another power cord (if available).
4. If the problem persists, replace the power supply. Refer to the 500/800 Series Service Manual pages 8-27 and 8-28 and pages 8-5 and 8-6 for instructions.
5. Following replacement of the power supply, turn the printer ON and attempt to verify functionality.
6. If replacement of the power supply does not solve the problem, replace the Electronics Module. Refer to the HP Designjet 500/800 Series Service Manual pages 8-24 through 8-26 and pages 8-5 and 8-6 for instructions.
7. Following replacement, continue with verifying printer functionality.

Verifying printer functionality

1. Turn the printer on.
2. Allow initialization to complete.
3. Load media into the printer.
4. From the main front-panel menu, select the Ink menu and press ENTER.
5. Select Troubleshooting and press ENTER.
6. Follow the instructions on the front panel.
7. Following a successful troubleshooting plot, have the customer send a file from the computer and make sure the file prints correctly.

Copyright Hewlett-Packard Co. 2001
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.

	Web computercare.cc