Summary: I have read and tried everyone methods (dc controller, replacing toner, & adjust paper sheet type) of resolving toner leak. The answer to everyone's problem, is to " check & replace the the two black alienation plates (1.5" wide by 10" long, strips are vertical position, held by 2 phillips screws)" located on the back wall after removing all 4 toner cartridges. I found that the plate had cracked and didn't allow the toner to close properly.
Summary: I just got this printer as a second hand product for my personal uses around one month ago. The printing quality is good and acceptable. My office also has hp 4600 and hp 4650dn. But I feel that the one that I got is newer than my office. It 80% news as I see it. There are two thing that disappoint me only: 1. This printer support thick paper upto 160 gram only. What I expected is 300 grams. 2. This printer could not support A3 apper size.
Summary: When toner streaks and toner colors do not go away after replacing the catridge, its not the toner cartridge thats the probelm it the electronics inside the printer that controls the opening and closing of the toner catridge that needs repair/replacing. These electronics are generally not meant to be replaced by repair personnel and so the manufacturers don't maintain a supply of them to purchase for replacement.
Summary: My HP printer is 4 years old and only has 2 users - I read the reviews posted and was shocked to read that other folks have the identical problems that I have with my HP 4600. toner leaks and toner lines. This is an expensive printer to have problems like that. Thanks for the opportunity to post my dissatisfaction.
Summary: My office purchased this printer about 6 years ago, so I can really speak when I say it's reliable. 6 years later it's going strong and we have no need to replace it, here's why: 1. It's fast and continuous when it prints. 2. It rarely has a paper jam. 3. It prints really crisp color pictures. 4. Good display screen for showing things like when the ink is about to run out, and how many pages are left before needing to purchase more ink. Easy navigation. 5.
Summary: The product is good, no complaints yet. However I was extremely disappointed with the condition in which it was sent. Granted the post can be brutal, however this does not mean that the box should be battered beyond recognition and the printer itself, came with ABSOLUTELY no cables none for plugging it in or for attaching it to your computer. Additionally, NO instruction manaul was sent. The printer had several black smudges on the top and sides.
Summary: This printer is a lemon. Had it for a few years and the entire time it streaks large quantities of magenta all over the backs of pages. What a mess. Called HP, had a repairman out, etc., but the problem continues. This thing weighs a ton and it spews forth a ton of garbage. Why can't HP own up to this defect and recall like most other multi-millian dollar companies out there? In this case, you don't get what you pay for. It was expensive!!