Default Please help ? HTC one S bricked ?

HI !

My friend tried to flash a custom rom in HTC ONE S, but something went wrong, he said that when he tried to boot the phone it, the stock logo "HTC quietly brilliant" and some red letters. I think he bricked it. Can anyone help me? or just post the right link, a beginner tutorial, ? i need to know how to flash a kernel, or a custom rom, ?
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