Can't update bios due to power

[redivius]

I downloaded and created the IBM flash disk for my 560z, however once started it checks for power and says check power cord is connected - it is and battery is charged, trired without battery same message - I have the power set to never sleep etc pc will run indefitently but can't get around this startup for flashing any suggestions?

[whizkid]

It may just be saying that you should be really sure; not that it can't detect it.

What happens if you tell it to continue?

[redivius]

It will just go back to first step again, 2nd time or 3 times always the same