I was right : my CD-RW disc was the source of the trouble.
I tried with a new disc, the machine recognized the CD and launched the CD boot.
Now, another trouble.
OBP tells me :
Code:
Following devices are disabled :
ide
I found a solution on a forum, I'll try it tomorrow, my wife went to bed and the Blade is a noisy machine.
The tip I found :
Code:
To fix, send a stop-A (Ctrl-A F in minicom), you should have the OBP ok prompt :
{1} ok .asr
{1} asr-clear
{1} reset-all