I have problem with HP Z2 Tower G4, after replace MB I start to programming. I set time and date, update BIOS to last version and after restart, the computer turn on and I get HP logo on display and pressing F10 to go in BIOS to set SN, PN,FB and BID, save and exit. After that desktop turn on and I hear the internal fan, but the display is blank and I can't access bios again. I try to recovery BIOS using USB recovery drive but without success. any suggestions?