Question about HP LaserJet 4730 MFP Printer
We Replaced the DC Controler ,Formatter Scanner Control Board & Flat Cable it comes on but Ready ,Attention & Data Lights Flicker
I had an issue similar to this and it was fixed by replacing the memory dimm on the bottom of the formatter.
Posted on Dec 08, 2015
Well we can check and see if the printer is able to run an engine test. This is how you can run this test;
The Firmware might be outdated and causing this problem. Worst case scenario the board might be faulty, in that case your better off buying a new machine, since the cost to replace the board will be higher than that to replace this machine.
Posted on Nov 19, 2008
The device has experienced an internal
Posted on Mar 22, 2009
Remove the toner and wipe the small window that's above where the drum unit sits inside. That window gets covered with toner and makes light prints and blank areas.
Posted on Nov 18, 2009
You will not find the answer to this problem on any forum as I have searched each one! However I have had the same problem and found out that if you have reseantly replaced or reseated the Paper Pic-up assy you may have not pushed down the plastic top cover which sits directly underneath the Cyan Cartridge, this will cause your 5550/5500 to think there is no problem and carry on printing without any error messages.
I'm just a man doing a boys job, lol
Posted on Feb 23, 2010
Testimonial: "Wow! Thank you sir. That was the problem. I had not touched the paper input assembly. So obviously, a user did this. Thanks again!"
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