Did you do anything to it, CWM, ROM etc? When I soft bricked my captivate that's all it would do. I had to get a jig to fix it.
I don't know how to unbrick a Thrill, but I think the O3D forum has an unbrick method that should work, if its a soft brick vs hardware failure.
Sent from my Galaxy S II (i777)
> HTC 8525
> iPhone 3G
> iPhone 3GS (it was a dark time in my life, I was confused)
> Palm Pre
> HTC Aria
> Samsung Captivate
> LG Thrill
> Samsung Focus
> Samsung Galaxy S II (I777)
> HTC One X
> Samsung Galaxy Note II (I317)
+ HP TouchPad