I loaded a new bootloader u-boot.asc via UART (see screenshot). Unfortunately, there is still other data in the flash memory. Is there any way I can delete it?
are you following https://openwrt.org/toh/arcadyan/vgv7510kw22 ?
yes, I upload the u-boot code to memory: cat openwrt-lantiq-vgv7510kw22_ram-u-boot.asc > /dev/ttyUSB0