I've a Samsung Nexus S here from a friend of me.
The phone was rooted and flashed with Cyanogenmod 10.1. Without any special action the phone doesn't power on again after a reboot (during a software update CM10.1). There's nothing. Only a black screen. No lights! Nothing...
I've tried to power on it for several times. I've tried to start it into the download mode and the fastboot mode. But only a black screen. My computers Mac, Linux, Windows are detecting nothing when I'm connecting them to the phone.
Do you've any ideas for unbrick this nexus s?