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The VTX power switch pin is defined with a default OUTPUT level in hwdef.dat, but was never mirrored into hwdef-bl.dat. Since ChibiOS's own unconfigured-pin default is INPUT FLOATING, the pin floated for the entire time each of these boards sat in the bootloader (DFU / SD-card flashing), even though the main firmware correctly drove it once it booted. Add the matching line so the VTX power rail has a defined state throughout. - AEDROXH7 (PB12 VTX_SW) - DAKEFPVF405 (PB4 VTX_PWR) - DAKEFPVH743Pro (PE3 PINIO2) - FlyFishRCF405 (PC5 PINIO1) - HWH7 (PE4 VTX_POWER) - JHEMCUF405WING (PC13 PINIO1) - LongBowF405WING (PC13 PINIO1) - OrqaF405Pro (PB9 VTX_SW) - SIMPLIFLYH7 (PB2 PINIO1) - SPEDIXH743 (PA2 VTX_SW) - SpeedyBeeF405WING (PC13 PINIO1) - speedybeef4v5 (PC13 VTX_PWR)