Hello community !
As we all love our workstations , I have a rather big issue with my Z600.
Because I was curious if I can set my second GPU to compute , I set the option and restarted the machine.
Problem is it didn`t boot anymore (of course).
I tried clearing the CMOS with the buttoon , and that led me to the BootBlock Emergency Recovery Mode.
It requested a new BIOS to be flashed , so I got a bunch of CD`s (USB didn`t work whatsoever) and tried to flash.
All of the images flashed , but the issue is the following :
1.It says I should remove the power cord , wait 5 seconds and then reboot it. Can`t I just use the power button ? Am I doing it right by following the exact inbstructions appearing on screen ?)
2. When I manage to boot it again , fans go wild for a few seconds and then to normal. Power illumination goes from blue to black and then RED starts blinking 8 times. After this I am again into the BootBlock Emergency Recovery Mode , doing the same as step 1.
Any suggestions how can I fix this without going to an HP Certified Service center (I probably won`t have the money to pay the service , as it is out of warranty)
Looking forward to replies , this is kind of urgent 
Thank you in advance !