Support Samsung Galaxy S 4G - "Bricked"?

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http://androidforums.com – Hello, I have a Samsung Galaxy S 4G from T-Mobile. It's not booting up anymore and could not get pass by the screen (attached) that displays a phone, exclamation mark and PC. I tried all the different combinations to boot and load to download mode but still will not load. Tried plugging into another machine and still cannot get it to boot up. Any help and suggestions are greatly appreciated. Thanks in advance. (General)