You have to Downgrade before Flash the Bios Mod so follow this
Guide (Donovan6000) :
http://donovan6000.blogspot.it/2013/06/i...overy.html
Then use this tool HP UEFI to prepare an USB Stick Fat32 Formatted
then rename It as HP_TOOLS
http://ftp.hp.com/pub/softpaq/sp52501-53000/sp52509.exe
Then copy into the USB Stick the Recovery Files :
http://rghost.net/6RkTpCHrP
[MULTI_FD]
Flag=1
FD#01=PCI,0,0,0,2C,FFFFFFFF,1666103C,01666F14.BIN
FD#02=PCI,0,0,0,2C,FFFFFFFF,1667103C,01666F14.BIN
FD#03=PCI,0,0,0,2C,FFFFFFFF,1668103C,01666F14.BIN
FD#04=PCI,0,0,0,2C,FFFFFFFF,1669103C,01666F14.BIN
FD#05=PCI,0,0,0,2C,FFFFFFFF,166A103C,01666F14.BIN
FD#06=PCI,0,0,0,2C,FFFFFFFF,166B103C,01666F14.BIN
FD#07=PCI,0,0,0,2C,FFFFFFFF,166C103C,0166CF14.BIN
FD#08=PCI,0,0,0,2C,FFFFFFFF,166D103C,0166CF14.BIN
FD#09=PCI,0,0,0,2C,FFFFFFFF,166E103C,0166CF14.BIN
FD#10=PCI,0,0,0,2C,FFFFFFFF,166F103C,0166CF14.BIN
FD#11=PCI,0,0,0,2C,FFFFFFFF, 1670 103C, 0166C F14.BIN your Bios = 0166C
FD#12=PCI,0,0,0,2C,FFFFFFFF,1671103C,0166CF14.BIN
FD#13=PCI,0,0,0,2C,FFFFFFFF,1672103C,0166CF14.BIN
FD#14=PCI,0,0,0,2C,FFFFFFFF,338A103C,0338AF14.BIN
FD#15=PCI,0,0,0,2C,FFFFFFFF,338B103C,0338AF14.BIN
FD#16=PCI,0,0,0,2C,FFFFFFFF,338C103C,0338AF14.BIN
Use the Recovery Procedure . . .
Now shutdown your computer. With the flash drive plugged in, hold down the Windows key and the b key.
Press the power button while continuing to hold down those two keys.
After a few seconds, the activity light on your flash drive will flash.
You can now stop holding down those two keys.
The screen may stay black for as long as 40 seconds and you might hear some beeping,
but eventually a screen like this will come up . . .
Wait for it to flash your BIOS and verify the new contents.
Then it'll restart and your computer shouldn't be bricked anymore.
After Downgraded to F.14 version then try again to Flash the Bios Mod !
Let me know
Regards