I've resolved a big problem with info from this forum so I post a feedback for next person that have same issue. Sorry 4 my english, probably some day I'll update.
Motherboard FATAL1TY 990FX Professional error with Dr DEBUG CODE C5 (Don't boot and nothing solves problem)
1º STEP: Like a French guy with same Issue: BUY A 990FX BIOS UPDATED CHIP TO: BIOS-chips24.com (About 3-4 days and 10 euros).
2º STEP: Just change BIOS chip. (Just pressed on motherboard its easy to do with hands and fingers)
Probably this steps is enough to solve, but I get a error message and always have to press F1 key to pass error message:
"1394 GUID are invalid in both CMOS and Flash"
3º STEP: You could search for a old software called "1394id" or "fwguid.exe" developed by Asrock.
4º STEP: Download a FreeDos Operating System
5º STEP: Create a boot disc with FreeDos and with fwguid.exe
6º STEP: Locate a yellow code in PCI port that shows GUID from your motherboard, it's a 8 bytes code (16 digits)
7º STEP: Boot and key: "fwguid c [YOUR ID GUID]
8º STEP: TADAAAAANNNNN
I'm not a poster, just archive this steps where have to be. And correct my post and my english.