Fanoush, I downloaded Knoppix LIVE CD and burned onto a CD. I tried to run it on my Dell M70 but it freezes and the I googled and found that Knoppix on Dell M70 has that problem. SO I tried it on my old Dell Latitude CPi and booted using Live CD. It booted fine. I did "sudo -" to become root and ran the linux flasher. It stopped at "Sutable USB device not found, waiting". At this point, I connected the charger to N770 which was alread connected to USB via cable. But the flasher didn't buzz, it was still waiting. Do you have any idea what could be wrong ?

Thanks and appreciate all your help.