Color LJ 5550dn - Display Panel blank -all lights stay on (2605 Views)
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Advisor
matt_12511
Posts: 12
Registered: ‎09-18-2006
Message 1 of 16 (2,605 Views)
Accepted Solution

Color LJ 5550dn - Display Panel blank -all lights stay on

Hello,

Our Color LaserJet 5550dn makes the normal start up sounds but the display panel never shows a message and the Lights for Ready/Data/Attention stay on.

We came back to the office after the weekend and it would no longer start up properly. I can think of nothing that changed between last Friday and today (Monday).

Any ideas?

Thanks,

Matt Herbert
Honored Contributor
Mark Froggatt
Posts: 1,741
Registered: ‎07-25-2006
Message 2 of 16 (2,605 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Matt

remove net work card and power up the printer if fault clears replace the network card as its defective

if fault still there then replace formatter

Mark
Advisor
matt_12511
Posts: 12
Registered: ‎09-18-2006
Message 3 of 16 (2,605 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

I pulled the network card and restarted and it failed again. I do not know what or where the formatter is. Any help on that?

Any other ideas?

Thanks,

Matt
Honored Contributor
Mark Froggatt
Posts: 1,741
Registered: ‎07-25-2006
Message 4 of 16 (2,605 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Matt

The formatter is the assembly that the network card plugs into. it may be best to have an engineer to look at it as the cost of a replacement formater is not cheap

Mark
Advisor
matt_12511
Posts: 12
Registered: ‎09-18-2006
Message 5 of 16 (2,605 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Do you mind if I ask what makes you think the problem lies with the formatter?

I was thinking there could have been a power surge and it may have done the damage. I just realized the printer was plugged into the wall and not a surge protector and we did have some storms over the weekend.

I may have to call an engineer anyway.

Thanks,

Matt
Honored Contributor
Mark Froggatt
Posts: 1,741
Registered: ‎07-25-2006
Message 6 of 16 (2,605 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Matt

the formatter runs the display, its next step i would take the problem with this sort of fault you get to a point were you have to make a decision on what to replace. its not 100% that its the part that needs to replaced its a good chance it is, but it may be the firmware compact flash or the dc controller. thats why i recommed to get an egineer to look at

Mark
Honored Contributor
Dewaine Chan
Posts: 7,433
Registered: ‎11-05-2002
Message 7 of 16 (2,605 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

You could do an Engine Test to verify the problem as suggested by Mark. Engine Test bypass the formatter board. Bad firmware DIMM will also cause thsi kind of problem too. If the Engine Test produces a page with straight lines on it, problem is definitely with the formatter.

HP OEM parts resellers like Laser Pros:
888-558-5277, ext 122
or printerworks.com or HP should have the formatter board available.


D.
Occasional Advisor
m kh
Posts: 10
Registered: ‎05-12-2006
Message 8 of 16 (2,605 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Hi

I got the same problem before ,replace the firmware flash memory P/N: Q7725-67908

Thanks
Advisor
matt_12511
Posts: 12
Registered: ‎09-18-2006
Message 9 of 16 (2,605 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Thanks for all the help!

I would like to know how an engine test is performed. I work in a fairly small town so I don't know how good our local printer technician is. I'd rather do this myself if that is possible.

Thanks again,

Matt
Advisor
matt_12511
Posts: 12
Registered: ‎09-18-2006
Message 10 of 16 (2,605 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Our local "expert" came and didn't seem to understand anything. He tooled around and left saying he needed to do some research on this model.

I could really use some help on how to run an engine test on a HP Color LaserJet 5550dn.

Thanks,

Matt

PS. I don't know much about this "points" system but I am awarding 5 points for a helpful response and 10 points for the answer.
Honored Contributor
Mark Froggatt
Posts: 1,741
Registered: ‎07-25-2006
Message 11 of 16 (2,537 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Matt

there is a very small hole in the left side panel insert a thin blunt non metalic object tooth pick will do the job, (there is a push button behind the the panel) this will produce the engine test page

Mark
Advisor
matt_12511
Posts: 12
Registered: ‎09-18-2006
Message 12 of 16 (2,537 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Thanks!
I ran the engine test and sure enough there are evenly spaced lines down the page. And from your earlier posts I assume this means I have a bad formatter.

I'm told that the formatters are on backorder and they don't know how long until one will be available. I'm going to have to order one and wait but I read somewhere about running a printer without a formatter. Since we only have 10 people in the office I believe this shouldn't be too much of a problem. Anyone know how I can set it up without the formatter for now?

Thanks,

Matt
Honored Contributor
Mark Froggatt
Posts: 1,741
Registered: ‎07-25-2006
Message 13 of 16 (2,537 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Matt

I can not see how you can run the printer with out the formatter as this is the interface for the print jobs sent from network/computer it contains the firmware to run the printer and memory.

Mark
Honored Contributor
Dewaine Chan
Posts: 7,433
Registered: ‎11-05-2002
Message 14 of 16 (2,537 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Matt:

Give Laser Pros:
888-558-5277, ext 122.
a call and order the firmware DIMM. It is much cheaper than the formatter itself. About 99% chance the FIRMWARE DIMM will take care of the problem.

Mark: An Engine Test totally bypass the formatter board. You could remove the formatter board from an HP LJ and perform teh Engine Test.
D.
Advisor
matt_12511
Posts: 12
Registered: ‎09-18-2006
Message 15 of 16 (2,537 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

Thanks to both of you.

I called that number and extension yesterday and got transfered to xt 163. I'll try again. I will order the DIMM today.

Do you know how to set the printer up to run without the formatter? The page I saw said the data would then be configured on each computer rather than on the printer which would slow it down, but it would still work and that is whats important right now.

Thanks,

Matt
Honored Contributor
Mark Froggatt
Posts: 1,741
Registered: ‎07-25-2006
Message 16 of 16 (2,537 Views)

Re: Color LJ 5550dn - Display Panel blank -all lights stay on

D

I know about the engine test. I was replying to the question about running with out the formatter

Mark

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