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Top Student
Posts: 6
Member Since: ‎07-21-2014
Message 1 of 4 (3,785 Views)

Error 8:04 on Designjet T790

I have a designjet T790 when initializing hang a 20% and later displays error 8:04. I tried to upgrade the firmware it also  get hanged at 20% and display the error 8:04.  To enter diagnostic mode is also hanged at 20% it also displays error 8:04. I need your help 

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Regents Professor
Posts: 4,432
Member Since: ‎01-17-2009
Message 2 of 4 (3,778 Views)

Re: Error 8:04 on Designjet T790

System Error: 08:04
Problem Description: Touch Control Panel communication to the product functions at the initialization, but during
normal working the communication is lost.
Corrective action: Try the following:
1. Reseat printer’s formatter (do this by loosening the formatter screws, disconnect and
reconnect the formatter, and tighten the screws again).
2. Replace the Formatter Board see Formatter on page 290
NOTE: For Revision B printers the Formatter and Hard Disk are replaced as a single
part,
3. Replace the HDD, see Hard Disk Drive on page 296
NOTE: For Revision B printers the Formatter and Hard Disk are replaced as a single
part,
4. Check connections of USB cable from Engine PCA to Interconnect PCAs.
5. Replace the Interconnect PCA, see Interconnect PCA on page 316.
6. Replace the Touch Control Panel Touch Control Panel on page 429
7. Check the event log at the EWS support pages to see if there is another SE (for instance
07:10) and troubleshoot the problem more accurately.Appendix C: Obtaining the product
log and the diagnostics package on page 75
Honor Student
Posts: 4
Member Since: ‎03-18-2016
Message 3 of 4 (1,620 Views)

Re: Error 8:04 on Designjet T790

Did anyone figure this problem out?  My HP Designjet T790 worked one day then the next it had error 59.3:00 followed by error 8:04.  I have gotten no support from HP.  I have not replaced any parts on the machine.  It just quit working.  I did force a firmwear update but had no change in error codes.  This machine is not inexpesive and was bought brand new a few years ago.  It now just collects dust.   Any input would be greatly appreciated!!!  Thanks

Associate Professor
Posts: 1,494
Member Since: ‎04-12-2012
Message 4 of 4 (1,580 Views)

Re: Error 8:04 on Designjet T790

Hello,

 

Please follow up on the following post

http://h30434.www3.hp.com/t5/DesignJet-Large-Format-Printers-and-Digital-Press/Re-HP-Designjet-T2300...

 

Copy and paste the same question on multiple posts does not really help to find a solution

 

Best regards

Mike G

I'm an HP Inc employee. But my response is not in behalf of HP Inc
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation