I believe you need root access for that. Once rooted just delete /system/etc/poweron.wav
Sent by a little green robot
Can the phone be rooted after ED2 upate is installed?
If you go into settings, then sound settings, click on Volume, and if you turn the System Volume all the way down it turns the power on/off sounds off but also turns off the click for selecting items
I believe you need root access for that. Once rooted just delete /system/etc/poweron.wav