https://devzone.nordicsemi.com/f/nordic-q-a/114353/can-not-re-flash-firmware-after-ram-offhi Nordic support team, I cannot re-flash firmware for nrf52840 after ram off is implemented. I recheck with other chip like nrf52833, it have the same result: \althrough it can connect to chip but can not re-flash firmware. Do you have suggestionen-USTelligent Community 13Fri, 30 Aug 2024 10:18:40 GMThttps://devzone.nordicsemi.com/thread/500551?ContentTypeID=1Fri, 30 Aug 2024 10:18:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c029acc9-d5b7-4be9-a7a8-3b50157e6844Quangca<p>Hello i can fix this.</p> <p>Step like this for anyone have same issue:</p> <p>1. using cmd jum to folder has .hex ex: ...\pca10040\blank\ses\Output\Rel</p> <p>2. Earse chip using ciommand:&nbsp;nrfjprog -f NRF52 -e</p> <p>3. Reprogram with another firmware Ram on with command line ex:&nbsp;&nbsp;nrfjprog --program name_file.hex --chiperase --reset</p> <p></p> <p>Done!!</p><div style="clear:both;"></div>