HP LaserJet 400 Color MFP M475dw Problems in OS 10.9.4

I posted an even more detailed description of this problem on July 7th (to which a link appears under this post). But it has gone unanswered, and I'm unable to find which category it went into........ 😐

John,

I did (for the third time now), and did it in the order you described. There was no HP folder inside the /Library/Printers folder; the only item there was the HP LaserJet 400 colorMFP M475dw (529299) app, which is the same thing (same version and same dates) that reappeared after I did what you suggested. BTW, the drivers you had me download from Apple are older than the driver I downloaded from HP -- that's a moot point, because neither one works. 😟 So....problem still persists. I was able to print one document, then get the "Printer is not connected" message again. Any other thoughts?

And BTW, here's a repost of what I posted on July 7th:

I'm running a 2013 Macbook Pro, 2.4 GHz Intel Core i7, 8 GB 1600 MHz DDR3, OS version 10.9.4 (updated to this OS version 5 days ago, on July 2nd). For a little less than a year I've been printing to a HP LaserJet 400 Color MFP M475dw via wireless connection. A few weeks ago I began to have numerous "printer is not connected" events, and it reached the point I could not print anything - from my MacBook, my iPad Air, or my iPhone 5S. I discovered there was an updated printer driver on HP's website, specifically for OS 10.9. Downloaded and installed it, and the problem was seemingly solved.

Then I updated the OS to 10.9.4. AARRRRGH!!!!!! For the last 5 days, the printer will - sometimes - print the first document in a queue of 2 or more and then, while the printer is still "running," tell me the printer is not connected. I turn the printer off and back on, get one print job, then have to repeat the process. Here are all the things I've tried to resolve the issue:

1. Verified settings on the printer to make sure everything is set up properly
2. Restarted Airport Extreme, printer, and MacBook (multiple times) -- clarification: I turned off both the MacBook and the printer, then unplugged Airport for a few minutes, replugged it, restarted the printer, then restarted the MacBook
3. Reset the printing system (as suggested elsewhere in the Support forums), which basically removes all printers from the MacBook, then lets you add back those that you want - presumably with the most current driver(s).
4. Searched help/support forums on Apple, HP, and the internet in general
5. Found a firmware update for the printer on HP's website -- but it is not compatible with OS 10.9 (only goes up through 10.8). I downloaded it and tried, even though 10.9 was not listed, and the "app" wouldn't even open.

All of these efforts have been to no avail. The problem persists, and I'm at my wit's end how to solve it. HELP, please..........anyone??????

John,

My name is Ginger - not sure where you saw Gary. 🙂 A screen shot of the folder I went to is shown below. Is there another one somewhere for which I should be looking?

John,

Okay -- thanks for the clarification. I found the correct folders, deleted the HP folder, installed the HP drivers downloaded from HP, and a new HP folder appeared. However, when I attempted to print something I got the "Printer is not connected" message again. So something isn't right. I should note that neither my iPad Air nor my iPhone 5S are able to find the printer either. These are all very recent developments. Have had this printer for almost a year and it functioned with multiple laptops, iPhones, and iPads flawlessly. So.........when I am able to regenerate some more patience, I will REDO the deletion of the print drivers and try the download from the Apple site and see if that makes a difference. I must say I'm not expecting anything different at this point........ 😠

I appreciate your efforts to help me. I'm signing off for now.

Ginger