I revived a second one! Same method. Put the hear dryer for 30 second on all the parts on the MB and ...BINGO!! A floppy with a question mark!

Now I can hook up an external floppy driive or the one HD that is working. 4 others spin...but are not working

@Trash80toHP_Mini

Thanks for the compliment and thanks also for the explanation about the adapter. I will try to use it like that later. Will be handy if I like to add a new system to the disk!

Some pictures: