3GS 4.2.1 6.15 turns into brick

[Super7668]

today accidentally battery drain out, the phone is not bootable anymore. I try redsn0w to tether, I try to restore with customized IPSW build by pwnage tools, not working. Any idea? 3GS with 4.2.1, 6.15 BB.

What else can I do?

 

[Super7668]

any idea? thanks!!!

 

[jay12]

No idea how to fix but why did the battery dying make it stop working????

 

[Super7668]

restore under DFU, error code 1600; restore under recovery mode, error code 21.

 

[jay12]

restore under DFU, error code 1600; restore under recovery mode, error code 21.

Guess it's over my head. Still makes no sense to me that the battery dying would screw up the phone.

 

[Super7668]

No idea how to fix but why did the battery dying make it stop working????

cause I can't tether again using redsn0w...it stuck at while apple logo...

 

[Super7668]

anyone know what should I do now? Can't restore at all with the firmware I build. always error code 1600 with DFU.