Hp 6950 Downgrade Firmware

On the printer’s front panel:

HP does not officially host old firmware versions. You can try: hp 6950 downgrade firmware

Firmware example: OJ6950_xxx.bdl or HP_OJ6950_xxxx.exe On the printer’s front panel:

A DIY trick: cover the electrical contacts on the cartridge chip with a small piece of non-conductive tape (except for the main power pins). This is hit-or-miss and can damage your printer. HP does not officially host old firmware versions

If you are constantly fighting firmware battles, consider buying an eco-tank printer (Epson EcoTank or Canon MegaTank) that uses refillable ink bottles and has no cartridge chips to block.