HP Smart Tank 7602 stuck at Verifying after Web Services Update

[ArtWalkerCO]

@Bucci99 - First off, thanks for the info on the boot loader screen. I had stumbled across it earlier, but did not know how to progress from there to the loader menus.

Finally had some time today to dig deeper into this, and I think we may have a solution.

First, HP released a Firmware update for the 7602 version 003.2450A dated February 5, 2025.

Downloading and running the firmware updater was unsuccessful as it was unable to connect to the printer over a network connection.

However, if you look in the temporary directory  ("%TEMP%\7xS5EA5" or similar), lo and behold, there is a firmware image file "sayan_premium_plus_dist_pp1_003.2450A_nonassert_appsigned_lbi_rootfs_secure_signed.full2". Copying that file to a FAT-formatted USB drive (I used a spare 2GB I had laying around), inserting it into the printer and selecting "reflash" from the boot loader menu showed a progress bar after a few minutes. A few more minutes later, I received a message on the LCD that the latest firmware update was successful.

NOTE: I need to go back and make a note of exactly which option I selected, but I was able to get the printer to accept the firmware file from USB without needing to rename it.

NOTE 2: It looks like all you really need to do is have the USB drive in the printer with the firmware update and power-on/plug-in the printer. At that point it should auto-detect the firmware file and update accordingly.

[ArtWalkerCO]

@Tasto - It looks like there is a way to get an updated firmware image and update via USB drive. See my previous post for details.

[bucci99]

@ArtWalkerCO Wow, thanks for this information, I'm trying it now.  I haven't gotten it to work yet, though.  I do see the lights on the USB stick flash during boot up like it is reading the drive, but I still go to the verifying screen.   I'll try the various flash options from the boot loader now.

Did you get your printer all the way back?

[bucci99]

@ArtWalkerCO - This is so awesome, my printer is fixed!  Now, what do I do with the Canon Maxify I already bought to replace the HP 7602?  Haha, it looks like I own 2 printers now.  And my trust is in the Canon, because not only was an HP firmware update 100% at fault, but HP told me on the phone my printer was bricked and tried to sell me a new printer.  However the printer was not bricked, it just needed a stranger on the Internet to help me when HP would not.  Thanks so much for this solution.

[ArtWalkerCO]

@Bucci99 - Great to hear! Because I failed to take notes when I was attempting this, did the printer recognize the firmware update by powering up the printer with the USB drive inserted or did the "reflash" option from the boot loader do the trick?

[bucci99]

Yes, the boot loader found the firmware on startup without the need to long press the power button to access the boot loader menu.  So now that I know this trick I'm keeping a copy around for the next time HP issues a bad firmware update.

However, the system is very finicky with regard to the thumb drive - I had an extra disk partition on mine from a previous project and that stopped my first try from working.  So it definitely needs to be a single partition with the FAT file-system or it won't work.

[ArtWalkerCO]

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@bucci99 wrote:

However, the system is very finicky with regard to the thumb drive - I had an extra disk partition on mine from a previous project and that stopped my first try from working.  So it definitely needs to be a single partition with the FAT file-system or it won't work.

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That's not unusual for USB-based firmware or BIOS updates. As a general rule, having a single file on a single partition tends to work the best (most on-device firmware updaters have pretty simple filesystem scanning code).

[Tasto]

Thanks to ArtWalkerCO

A huge thank you to ArtWalkerCO for the help in finding this solution!

HP Should Do Better

It's frustrating that we had to figure this out on our own, while HP’s only suggestion was to restart the printer. They should provide better support and clear instructions for their customers instead of leaving us to troubleshoot their problems ourselves.

 

How I did it with the Words of ChatGpt

 

How to Manually Update Firmware on the 7605 Printer

1. Download the Latest Firmware Update

   • Get the most recent firmware update file (e.g., from 05.02.2025).

2. Locate the Firmware File in Temp Folder

   • Open the Run dialog (Win + R), type %Temp%, and hit Enter.
   • Sort files by time and locate a folder (e.g., 7zS7C1C).
   • Inside, find the firmware file (e.g., sayan_premium_plus_dist_pp1_003.2450A_nonassert_appsigned_lbi_rootfs_secure_signed).

3. Prepare a USB Stick

   • Format a USB drive to FAT32.
   • Copy the firmware file onto the USB stick.

4. Update the Printer

   • Power off the printer.
   • Insert the USB stick into the USB port of the printer.
   • Plug in the power cord and turn the printer on.

5. Wait for the Update to Complete

   • The update process takes about 5 minutes.
   • Once finished, the printer should restart with the new firmware.

[eastpole]

Cool thread, you all helped me fix my HP Smart Tank 7602 after suffering from a firmware upgrade failure. 

With the HP techs on the phone I made several attempts to rescue the printer, but nothing worked. Several times we ended up stopped by the Embedded Web Server (EWS) not really working. The printer would get an IP address from DHCP, and answer pings on the network, but the web server wasn't configured and so you would get something like this at the EWS page:
https://www.f5.com/company/blog/nginx/welcome-to-nginx-on-my-favourite-website

(Text saying Welcome to nginx!) 

Which I found cute and hilarious but the HP techs had no idea what it meant. 

I just wanted to add that the downloadable Windows file that contains the firmware upgrade is still available 4 Mar 2025, and it is called: 
      HP_ST790_ST7600_2450A.exe

I was able to install it on a Windows 10 machine and then used the built-in file search to look for any file with a name starting in "sayan." After a long search I found: 
   sayan_premium_plus_dist_pp1_003.2450A_nonassert_appsigned_lbi_rootfs_secure_signed.full2

(The file size is 63423194 bytes.)

And a simple copy / paste dropped this into the root directory of a Fat32-formatted USB key. 
In the end I was a little sad that the rescue firmware (accessible by long-holding the power key while plugging the printer into power) was not required. The printer will install the firmware with a simple power-on, when you've plugged the USB key into the printer's port. It even did a nice "Downloading XX" and then "Installing XX" countdown process so you knew it was working towards something.  

I had a quick look at the Exe file and was not immediately able to take it apart in Linux. Perhaps for Linux, Chromebook, and Mac customers, HP should make the driver file available.  Just an idea! 

Cheers and thanks,

tai 

[ArtWalkerCO]

The Firmware installer EXE is a self-extracting 7Zip archive, which can be opened using tools such as P7Zip.

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@eastpole wrote:

I had a quick look at the Exe file and was not immediately able to take it apart in Linux. Perhaps for Linux, Chromebook, and Mac customers, HP should make the driver file available.  Just an idea! 

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