Hi, I have an HP ZD8000. I just recently attempted to resolder the DC power jack. I took everything apart. First, I got this: PXE-E61: Media test failure, check cable PXE-M0f: Exiting Intel PXE ROM. So I went into the boot options and disabled the network adapter. Got rid of that error, but now on the top left and bottom left of the screen there is a blinking underscore and a blank screen, and the screen flickers. It will not boot off of the cd rom. Please help me out.