Epson Driver 7840

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Loree Naumann

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Aug 3, 2024, 4:20:17 PM8/3/24

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After installing MacOS 14.4.1 in wireless (WiFi) mode printing (from) and scanning (to) my Mac the printer ALWAYS says the printer is out of paper (it is not, it does not matter what tray... all are full and properly installed). In addition scanning and printing are VERY slow. The signal strength on the printer says "Excellent". About half the time scans do not complete, I restarted the computer/printer/router - all three, and am able to resume, then suddenly the same problem. After a month of these issues I returned the WF-7840 to where I purchased it and they sent me another one. Same issues immediately. I have verified that I have the latest firmware, drivers, and software. Same results. I have removed/uninstalled the printer/scanner multiple times and reinstalled it. Same results. I have tested the speed of the wifi on other Mac computers and devices, same issue (all running MacOS14). I have tried to print/scan with other computers both wired (USB) and wifi, same issues. I have reached out to Epson who tells me is an issue with Apple's Bonjour/Airprint under MacOS 14.4.1 running on "older Macs" -- I have a MacBook Pro 2023 16" M2 Max. This is driving me bonkers! It should not take 10 minutes to scan a single page document at 200dpi. I will occasionally get a "lost connection error" that appears to be generated by the Epson Scan 2 software. The other two "errors" are "out of paper" and "printer is off-line" which are in the system print dialog box. All of this was working before Installing MacOS14 on the other Macs. Befuddled.

Can you connect the printer to your Mac and print wired to make sure it will print OK. If it does then that points to the router and WiFi. In that case try the following in order as needed with the printer not hard wired to the Mac:

I am having similar problems with a WF-7840, wifi has been dropping connections w/ 14.x.x. I boutght a new MacBook Pro in January, and upgraded to the WF-7840 as the drivers for my previous Epson WF printer did not appear to be supported on the latest MacBooks. This is very frustrating. Which one do I get rid of? (My wife's Win 11 notebook connects fine; my iPhone connects sporadically and prints occasionally. Appears more and more to be an issue on the Apple side.

I've search the web about how to downgrade the firmware. I found the procedure, found how to put the printer in "recovery mode" and, on the Epson website, I found the "Recovery Mode Firmware version CB08LC" for the Epson WF-7840.

Go to the temp directory on the C:\Users\Your-Username\AppData\Local\Temp, you should find a Epson directory run the FWCH67TL_CD08M4.exe, now on the temp directory above you will find a directory called Firmware Updater() copy the file FWCH67TL in a safe place (this is the firmware you want).

Close the updater now run FWCH67TL_CD17M6.exe you will find in the Temp directory a new Firmware Updater() directory swap the file FWCH67T to the file you have previously saved continue the update overriding the firmware on the printer.

AWESOME. Thank you so much. I have the WF-7840 . I couldnt get it to work at first but ended up opening the the older firmware to install and just copied both the folder that were created in the temp loaction (WZSE1.TMP and Fimware Updater1). then went to install the new update and just pasted both those copied folders into the new folder and replaced the files in the destination. Thanks so much

13. When I returned, almost half the lights on my printer were blinking, including error, printer, and many other. Lit up like a Christmas tree. Quite alarming, but nothing to worry about. Still some non-definitive text on the screen (but new stuff from before). Holding the power button did nothing.

5. Next you have to attach your printer to a USB printer cable (port located next to the power cable on the back of the printer). Epson recommends you unplug other USB devices which is silly. Just unplug other printers or other devices I may not be thinking of that could be damaged. I left my external hard drive plugged in without issue.

My printer also offered me a firmware update as soon as it powered back on. Obviously, make sure you decline! Also on your computer, you can update settings to NEVER for checking updates to prevent an accidental upgrade. Here is a link if you need that step by step. ( -printe...)

Recovery Mode = power off printer then hold the 4,7, job status and power button. I did not unplug the printer until it would not restart itself from the recovery mode. After the unplug and restart, I had to remove the ink cartridges and reinsert them. After that it worked!

I had this exact problem. Couldn't figure it out for months. Then, suddenly, I tried one last time, but this time I used the firmware update for another similar model, the EC-C7000. The Firmware version is different. But in my disbelief it worked. I'm still in shock. The CD08M4 version firmware update didn't work for me no matter what I did. But for some reason this other CD17M6 did the trick. Epson is a tricky bastard. I urge you to try it. You can find the version I used on the Epson website here:

-In...

Just be sure to let the printer do it's thing. The lights will flicker randomly, and after about two minutes the printer will turn off on its own. Once that happens you can press the power button and viola....

Good luck and godspeed.

So it worked to install the firmware but do all the printer functions work as they should? And could you remind me how to get to the ROM menu? I'm gonna look for that but if you already have the answer... ;)

Ok, the firmware update worked but I still have the same problem : the ink cartridge is not recognised... I tried putting the "CD08M4" file instead of the "CD17M6" also and ended up having the same message : File not found...

Firmware CD08M4 Works, however Printer Cartridges Not Recognized is still the prevailing issue. I've attempted the Cart. Removal, Closed Lid for Cart. Reset, and Reinsertion 10 times now. Nothing has worked. Using aftermarket ink of course.

MAC:
Tired and obviously confused today, so I updated the firmware which I never do. To recover, I used the MAC dmg file from Paul Muir above. Saved it to a to new folder somewhere and extracted it (click on dmg file). Then I used Finder to go to Applications, Epson Software, Epson Firmware Updater. Created a "backup" folder and copied the old software to that. Copied the newly extracted dmg files from my backup folder (19_license.txt, Epson Firmware Updater.app and FWCH67TL.efu) to the WF-7840 Series folder.

Then put the printer into recovery mode. Turn off printer. Hold 4, 7 and Job Status button on right side of printer, then hold power button until you get a screen. It came up with a black screen similar to DOS. I then ran the updater using the files I had placed in the WF-7840 Series folder (navigate to folder and click to run on Epson Firmware Updater.app. Follow app steps. It took some time and you need to not turn off the printer. The power button will blink occasionally while waiting. Wait until it turns off by itself. Took about 10 minutes for me. Then I just powered it on, got the unsupported cartridge error. Opened the top and removed and reseated my third party cartridges and that worked for me.

I only wrote this because I could not find a MAC specific solution. I am on Sonoma 14.2.1 and had to read a lot of articles and posts to piece this together for MAC.

But large thanks to Paul for including a MAC file.

FYI. If you need the old recovery software for your version OS, all you do is copy the link from 1a from above and replace it with the file name you get from epson, the drive files are all stored in the same directory as: _CD08M4....

I couldn't get it to work until I realized it was still connected to the internet. Just make sure you don't have it hooked up to wifi or ethernet or anything. Also, USB port in front didn't work for whatever reason, had to use the usb port in the back. Don't exactly know why it took so long, but at least a good half-hour spent waiting.

I have a pc running windows. I use Photoshop Elements 2020. When I try to import from my printer/scanner the printer does not show up as a divice I can choose. I have a new Epson 7840 all in one printer. I have talked with Epson and they say this is an Adobe problem. How can I get my Photoshop Elements to recognize my Epson printer so I can import from the scanner?

I had the same problem. Being a retired IT Specialist, I searched for the answer for myself and it indeed worked. I have an EPSON ET-15000/ In the Windows 10 OS I'm running it showed up as a default printer as well as a scanner. However I couldn't import a scan with WIA. The solution was to go into the scanner and add a scanner, Windows searches and displayed my printer with a different name. I let it install the printer and it worked in import WIA. Microsoft in their security for both Windows 10 and 11 require you to install their drivers for the All-In-One printers which is what I have. So my recommendation is to go into Windows setting add the printer not showing up in ADOBE software and install it through Windows with Microsoft Drivers. Mary T.

The Epson WorkForce Pro WF-7840 is an all-in-one inkjet printer designed for a small or home office. It's a wide-format printer capable of duplex printing 13" x 19" Tabloid-size sheets. It features both a flatbed and ADF capable of single pass duplex scanning Tabloid-size sheets as well. There are two input trays as well as a rear feeder holding 550 sheets in all. Connectivity options include Ethernet and USB both to the computer and for external storage devices, Wi-Fi and Wi-Fi direct, and support for Apple AirPrint and Mopria Print Service.