HP 4L laser printer - no power indicators showing -
HP 4L laser printer was showing faded areas in printed page. Before I could purchase a replacement toner cartridge, it failed to power up. No lights are showing on control panel when plugged into various power outlets. Is there a fuse or other power control device that can be checked? I assume exhausted toner cartridge would not have any effect on power indicators. Any ideas for testing or trouble shooting?
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Re: HP 4L laser printer - no power indicators showing -
There is not a fuse in the printers main board but i can say that there is circuit breaker on the board like fuse only instead of fuse there is a ic that ic has to be replaced if major damage the cost may vary other wise the ic is just under 1$ THATS IS.IF ANY ENGINEER DOES HE WILL CHARGE HIS SERVICE FOR THAT.BUT CALLING A ENGINEER IS ADVISABLE AS HE WILL ALSO CHECK OUT ANY OTHER PART GOING TO BE SHORT IN NEAR BY COMING DAYS.
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In your user manual there is a section that instructs you to create your own cleaning sheets.
This will clean toner off the transfer roller and the fuser areas. Additional cleaning can be completed with canned air and the specialized cleaning towels also available for purchase. Remove toner cartridge and carefully wipe the interior of any toner or paper debris.
DO NOT USE ORDINARY PAPER OR CLOTH TOWELS!
These can leave debris in the printer and contaminate the transfer roller causing very poor quality prints.
Print a diagnostic page
If the steps above have not helped, print and evaluate a diagnostic page to see if the cartridges or the printer is causing the problem.
Make sure the printer is on and loaded with unused, plain, white paper.
Press and hold the Power button and then press the Cancel button. Release both buttons. The diagnostic page prints.
Figure 1: Power and Cancel buttons1 - Cancel button2 - Power button
Step 4: Note which cartridges printed which areas of the diagnostic page
You must identify which cartridge printed which part of the diagnostic page, so that if you find defects on the page, you will know which cartridge is the problem.
However, you can install different combinations of print cartridges in your printer, and different cartridge combinations print different diagnostic page patterns. Your diagnostic page may not look exactly like the picture below, but the right and left cartridges will print in the same areas of the page no matter which cartridges are installed.
Figure 2: Diagnostic page layout (the patterns in each area may look slightly different on your page)1 - Printed by the right cartridge2 - Printed by the left cartridgeNOTE:
If you are printing in reserve mode (one cartridge is missing), the missing cartridge's area of the diagnostic page will be blank.
Step 5: Check ink levelsNOTE:
If you have installed a refilled or remanufactured ink cartridge, or a cartridge that has been used in another product, the ink level indicator is inaccurate or unavailable.
Look in the middle of the diagnostic page. The bars with "E" (for "empty") and "F" (for "full") at each end show the ink levels in the cartridges. As ink is used, the solid color changes to a faded color.
Figure 3: Left (tri-color) cartridge almost full - right cartridge emptyFigure 4: Both left and right cartridges almost full
If its a laser printer you prob have a fusing issue. Its the part that actually heats the toner with fuser agent (light coat of oil) to make it stick to the paper and not smear. Either your fuser module is in need of replacing or you have something rubbing on the portion where the toner meets the paper. Chances are its the fuser module.
Does print is faded or it prints clear? If faded, just get your cartridge and shake it well to distribute evenly the toner. If prints clear, preview it first before printing and maybe the other print area you want is not included when printing. Just set the print area.
The color of HP LJ 2600n fades due to following reasons
1. the color cartridge near to empty
2. due to dust on reflection mirrors inside the printer
if the color cartridges are OK, then you need help of HP technician support, because cleaning of mirrors is very technical in nature for 2600n.
Dusty Environments can lead to Laser Scanner Contamination. The dust layer on the mirrors prevents proper transmission of the laser output in the imaging system leading to faded colors on the printed page. The initial stages of this failure typically occur in the magenta or yellow color planes as faded or light color. Often the left side is more faded than the middle.
You may need to contact the nearest Authorized Service Tech and get teh Laser Scanner replaced with the new released service part that has a mirror in a location where the dust ideally cannot reach easily.
Also, please ensure that the printer is relocated from the current location to a more dust free zone.
Hope this helps, if so do rate the solution
What you are describing is a bad print head. You can try running the eliminate light stripes several times, and jet substitution, but most likely the print head will have to be replaced to remedy your problem. You can try googling. Phaser printer print heads or phaser printheads. There seems to be a secondary market appearing for those print heads. I can tell you from Xerox, if you have no maintenance agreement, they cost $750 per print head. Honestly, having worked on about every type of color printer known to man, the new solid ink phaser printers, produce a dry ink image of 2400 x 2400 dpi with ink particles that align end to end. The resolution of those printers are remarkable and can be purchased for less than the price of one of those new print heads. Now for reliable, albeit somewhat not as sharp a color image, but still exceptional, you really can not beat an HP. The ink stick technology really no longer has the color vividness advantage it initially had. The inks that align end to end, have ended that advantage and are sure a lot cheaper to operate per page.
If the issue is occuring in the same place on all prints, try the imaging drum (can't remember if this printer even uses one) or the transfer belt/roller (not sure which it uses). If you phone Dell support, they should run you through troubleshooting and send you either of those parts free of charge if you are under warranty. If not, buy them anyways; they don't degrade over time (if kept in the dark) and can be saved for when the currently installed one runs out if you don't need it to fix this issue.