Root Rooting problems with my htc magic phone dead

[zeusc01]

A few days ago I decided to change my 3g htc magic rooting to htc hero room, but in the middle of the process my phone turns off and when I turn on the whole screen was on black as a yellow triangle with an exclamation mark on the middle and unresponsive. Practically dead.
Can someone help?

 

[TheBrit]

Try flashing it with a HTC Magic ROM - not a Hero ROM though you might now have bricked your phone by flashing a ROM intended for a different device.

 

[zeusc01]

Yeah I bricked my myTouch trying to flashing to Hero ROM. Now the phone wont even turn on. When I plug the usb cable to the phone and pc, the pc does not recognize it.