HP’s firmware from February 2025 implements a hardware fuse. Once blown, you cannot downgrade below version 2.1. Check your current version. If it’s 2.1.7 or higher, the new method above will still work because it exploits the bootloader, not the firmware. But if you see error code 0x61011d3 during downgrade, your printer is permanently locked.
The most recent firmware (released in Q3 2024) for the 8620 goes beyond ink restriction. According to HP support forums and printer communities (like Reddit’s r/printers and Pranknet), the NEW 2024-2025 firmware does the following:
Because HP actively patches known downgrade exploits, the old method (using a USB drive formatted in FAT16 with a renamed .rfu file) no longer works on printers that have received the December 2024 security patch.
You need a new approach.
Do not use the “HP Easy Firmware Update” tool – it blocks older versions. Instead:
This naming trick fools the printer’s updated security checks.
HP’s firmware from February 2025 implements a hardware fuse. Once blown, you cannot downgrade below version 2.1. Check your current version. If it’s 2.1.7 or higher, the new method above will still work because it exploits the bootloader, not the firmware. But if you see error code 0x61011d3 during downgrade, your printer is permanently locked.
The most recent firmware (released in Q3 2024) for the 8620 goes beyond ink restriction. According to HP support forums and printer communities (like Reddit’s r/printers and Pranknet), the NEW 2024-2025 firmware does the following: hp officejet pro 8620 firmware downgrade new
Because HP actively patches known downgrade exploits, the old method (using a USB drive formatted in FAT16 with a renamed .rfu file) no longer works on printers that have received the December 2024 security patch. HP’s firmware from February 2025 implements a hardware
You need a new approach.
Do not use the “HP Easy Firmware Update” tool – it blocks older versions. Instead: Because HP actively patches known downgrade exploits, the
This naming trick fools the printer’s updated security checks.