According to this topic:
A friend tried to downgrade u-boot, flashed accidently "dir600b_v2.17_bbox-v1.19.1.bin" into DIR-300 B5 router. Since then router does not work properly.
I got access to emergency web-boot on http://192.168.0.1/
But I can't flash a working firmware. Device stucks on boot-loop.
When I try to flash file from openwrt site:
"lede-17.01.7-ramips-rt305x-dir-300-b7-initramfs-kernel.bin"
I got message:
"FAILED TO UPLOAD IMAGE
Unable to upload the image, please make sure the uploaded file is the correct image."
I have searched for a stock firmware, found this site:
https://ftp.dlink.ru/pub/Router/DIR-300_NRU/Firmware/B5_B6/Old/B5/
Tried to flash some old firmwares, but without success.
Same with firmware from d-link site: https://media.dlink.eu/support/products/dir/dir-300/driver_software/dir-300_revb_firmware_patch_2.06.zip
I suppose guilty is a wrong U-Boot. Any chance to fix the device?