: Re-inspect all microscopic joints under a microscope. Cold solder joints can appear connected but fail to conduct high-frequency signals.
Consulting the official pinout for the Samsung M017F, the connection sequence to your programmer is critical. samsung m017f isp pinout
: Data signals easily distort when travel distances exceed standard bounds. Keep your enameled copper lines under 7 to 10 centimeters long. : Re-inspect all microscopic joints under a microscope
: Resetting the Factory Reset Protection lock after a hard data reset. samsung m017f isp pinout