1, the first step is to prepare some transparent tape and a paper knife, will use up the ink cartridge, the nozzle down, the ink cartridge electronic contact in the direction of their own. 2, then it is to take a piece of tape about 3 mm wide, this time it is necessary to paste to the electronic contact No. 6(read chip information). Note 35(black ink cartridge identification), 36(black ink cartridge information writing) on the foot. 3, then install the ink cartridge back to the printer, the system will detect, prompt the ink cartridge error, press \"OK\" to remove the ink cartridge. At this time, take a 6mm wide tape, and note that it is pasted to the 34th electronic contact (write chip information). 4, then the system detects the ink cartridge error again, press \"OK\" to remove the ink cartridge, turn off the printer power (be sure to turn off the printer power in the absence of ink cartridges). 5, the last step is to turn on the printer power, then click all the tape on the cartridges to remove, install the cartridges, the meter has been restored. At this time, the 803 cartridge is successfully cracked to zero.