Canon Service Tool V3800 Patched (100% UPDATED)
After resetting with V3800, always print an EEPROM information page (by clicking "EEPROM" in the tool). Check the "Dd" value (Absorber counter). It should read 0.0 to 0.3. If it says 0.0, you succeeded.
However, respect the hardware. Use the tool to reset the counter, but do not ignore the physical waste ink pads. Open your printer every two years, air out the pads, and consider installing an external waste tank. canon service tool v3800
For newer printers (TS700, TS800, TR8500 series), you likely need a newer tool (V5100, V5300, or V5400). For older printers (MP280, MP495), you need V3400 or V2000. Why Do You Need the V3800 Tool? (The "5B00" Error Explained) Canon printers use a non-replaceable sponge pad at the bottom of the device to absorb ink during print head cleaning cycles. Over time, this sponge saturates. To prevent ink from leaking out of the printer case, Canon programs a counter into the EEPROM. Once that counter hits a specific number (usually around 7,000 to 15,000 pages), the printer hard-locks itself. After resetting with V3800, always print an EEPROM