: If flashing in-circuit with a clip, try connecting the laptop's CMOS battery or even the main power adapter to provide the chip with enough stable voltage. Lower the Speed
The EZP2019 software (usually a Chinese-developed application) reads the chip’s Manufacturer ID and Device ID before any operation. If the chip is extremely obscure, too new, or counterfeit, the software may fail to recognize it. When the ID check fails, the software aborts with a "check error" at the first address. flash check error address 0h ezp2019
Usually, this error follows a common pattern of hardware or procedural oversights: The "Dirty Pin" Culprit : Most often, this error is caused by poor physical contact : If flashing in-circuit with a clip, try