QUOTE(ZeroCool.99 @ 1 May, 2008 - 05:43 PM)

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2 or 3 days ago I flash my CPU.Now when I turn on my Computer,
windows cant read HDD, I change my HDD but cant read any HDD in my computer.
My motherboard type is: "ECS PF4 Extreme".
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What you'll need to do is go to the website of the manufacturer for this motherboard, & download the newest flash image. They should have steps on how to install it. & it's important to understand that it isn't Windows that cant' read the HDD, you've removed the instruction code that your mother board uses to power on, look for devices, & load devices before booting the Operating System.
Usually a motherboard flash must be completed in one step, you boot the current flash, & with it booted, you flash it, & install the new instruction code. Then it can start the new flash when it restarts. However if you interrupt this process, chances are it doesn't have the ability to get to the point where you can install the new instruction code.
Best of luck zero cool. You might want to contact customer service (of the motherboard production company for this board) for further assistance, it might be bricked.