8310 searching & dead after change PA

hi,
Please help,
I have 8310 searching, first I try to flash it, but still searching, then I try to change the PA, after I change the PA, the phone become dead! then I remove the PA and the phone is alive without PA. The PA I used is good PA from another 8310, then I try to put diffrent PA, and the phone become dead again!!! now the phone is totaly dead, I remove the PA again and rehot but still dead.....
Anyone please give idea or solution.... :confused:
thanks

i face this problem too when i use 6510 to solder it to 8310 and when i try to power ON it my phone vibrator vibra and now my phone is dead too . have u solve ur porblem already if yes may i know how ?