, ensure the teeth are making clean contact with the chip pins. 3.3V vs 5V Logic:
Supports 24-series (I2C) and 25-series (SPI) Flash chips, including newer low-voltage (1.8V) models. as programmer ch341a download
For 99% of SPI flash chips (BIOS chips), choose "SPI" from the top toolbar. , ensure the teeth are making clean contact