White "Samsung" text on boot after flashing stock rom from custom cyanogen mod.

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http://forum.xda-developers.com – I had Cyanogen mod installed and was having a lot of glitches/freezes. I downloaded and installed the stock ATT rom (UCDLK3) and flashed it to my device following these steps. http://androidromupdate.com/2012/08/...tock-firmware/ After doing so, I am stuck on bootup with white "Samsung" text. I found this thread which had a suggested answer, but my phone won't boot into recovery mode. When I try to boot into recovery mode, i see small text at the top that says "Recovery rebooting...", but then it flashs "Samsung" quickly, then goes back to being stuck wi (HowTos)