Floppy not found

[BorisM]

Please help me! Sorry for my English. Recently bought a d8b from someone who hasn't turned it on for three years. First, the cmos error came out, after which I changed the bios settings, as written in the instructions that I found here. But now, when loading, the error "Searching for Boot Record from floppy...not found" appears. There is some kind of floppy disk from him, but apparently it does not work. Please tell me what to do now

[captainamerica]

http://www.sonido-7.com/d8b/index.html#Post6