Recover Samsung NC10 Phoenix Bios

[Ykrons]

Hi all,

I have an old samsung nc10, that suddenly stop working (black screen at startup, HDD spinning a bit, but no activities, no beep if RAM, HDD is removed).
I guess the BIOS has been corrupted.

I can see here that phoenix bios can be restored with Crisis tool but I have no success with it.

I have tried:
* unplug battery and supply
* plug crisis USB stick (prepared under Win10) with original 11CA bios on it
* press alt+esc / alt+b / win+b
* plug power supply
...
each time nothing more that usual: black screen, hdd spinning, no USB activity

Did some one know:
* if it is possible to use recovery on it?
* the good key sequence or procedure to start boot block on this laptop?
* is there other operation as shunting the CMOS strap also?

I have started to disassemble the original bios to see if I can find a start condition but it seems to be a huge task ...

Thanks for your help