How to flash dir-300?

Question

network hardware

I found a d-link dir-300 D1 1.0.4 router, firstly the muzzle crawled out at the standard address 192.168.0.1 "Emergency Web Server", downloaded the firmware, tried to flash it. The router stood in this state for a long time, the indicators blinked, and constantly rebooted. I decided to try another firmware, third, fourth, etc. There were countdowns of 60 and 120 seconds before the end. In general, now I put any firmware - it writes "Invalid image file". And it doesn't flash. Telnet on 23 is not connected. Through cmd telnet put also does not flash. Tell me how to restore it?