Quote Originally Posted by Leeghoofd View Post
Only one way to solve it lads,

1) power off (pull the power cord)
2) remove the 2 bios (plz keep an eye on how to place them) chips : the pc boots from the right hand one so 1611 pull that one first and put aside
3) put the one on the left on the right hand side
4) Boot Pc and enter Bios
a) either you can continue to use this chip and flash it with eg 1406 or
b) you can open EZ flash to HOTFLASH the 1611 chip (that used to be on the right hand side) continue to step 5
5) no fear while the pc is running (in EZ flash tool) : pull gently the bios chip and replace it with the 1611 chip version
6) continue to flash 1406 or bios of preference
7) 1611 is reflashed with bios of preference

I just did this as the Asusupdate tool gave me some warning of it not being the correct eeprom and the above method worked fab ( I got one 0803 and one 1406 now )

Just make sure when pulling the bios chips that you don't use too much force as the pins bend easily (luckily they don't break rapidly)

It seems the 1611 needs a special engineering afudos file. The guys at the Asus forum have found it.

http://vip.asus.com/forum/view.aspx?...age=2&count=15

Post by na
*** SOLUTION FOUND FOR P5Q BIOS DOWNGRADE ***

hey Mark,

I did try clearing the CMOS a dozen times all different ways (bios, afudos /pcn, jumper/battery etc) to no avail.

I tried the afudos that came on the CD, which complained about the bios being too old (1406). I tried v2.07 which failed with a message of "main BIOS checksum is bad". For anybody who needs to downgrade in the future, this link is the key - this SPECIFIC afudos binary, some sort of engineering version that will allow downgrades (see last post):

http://www.tomshardware.com/forum/24...downgrade-bios

also found it afterwards in a user post here:

http://vip.asus.com/forum/view.aspx?...Language=en-us

Why can't asus give this information out themselves instead of users wasting time trying to figure out what's wrong? I can say that my next mainboard will not be an asus.
Post by Randy
Having restored the 1406 bios as described above, I am able to use EZ Flash to downgrade to earlier bioses. (I just tried this because I'm not sure that my 1406 restore was completely successful.) It seems likely that there is something in 1611 that prevents the normal bios tools (EZ Flash and standard AFUDOS variants) from doing downgrades.
Hope this helps someone.
-=Mark=-