The "flash check error address 0h" is a notorious hurdle for anyone using the EZP2019 programmer to unbrick a motherboard or flash a BIOS . This specific error usually signals a verification failure
Modern laptop BIOS chips often run at 1.8V. The EZP2019 has a small jumper or switch (varies by clone version). If you select 3.3V for a 1.8V chip, the chip’s I/O pins may not respond correctly, leading to a failed read at address 0h. Conversely, supplying 1.8V to a 3.3V chip might result in too low logic levels. flash check error address 0h ezp2019
