Hi Gyuri,
thanks for your reply. The ram is soldered on the 286 board. I am not able to test it. The best should be to know the beep code.
Anyway I tried putting on the main board a different 286 board and this latter is working.
When I switch on the computer I see lights on the keyboard. So I assume the keyboard is working fine. However I am not sure how to change video without see the bios.
I was thinking to flash the update bios and see what happen or to use the universal bios xtide on a net card.
If I remove the dallas chip there is only one continuous beep.
Any idea where I can find the manual?
Thanks a lot,
Franco