Double check the monitor connections, especially the one to the video card because this one tends to become loose if the two screws of the conector are not secured. Also check the cable connections on the monitor side
Disconnect the hard disk completely and start the computer. You should see something showing up on the monitor.
If this doesn't work then try to move the monitor to another computer and see if it works there. If it doesn't then it's faulty. If it doe's then we have another hardware problem, probably with the video card. Alternatively you can connect another monitor, known to be good, to your computer and see what happens.
To check the HD you must, first of all, have a working monitor. If after having the monitor working, and after connecting the hard disk to the cable and connector in which the Phillips cd showed up, and if you jumpered the HD correctly, if after all this the HD is not recognized then it's probably finished.
As a matter of fact it looks as if you have several overlapping problems which should be sorted out. If you can connect the hard disk to another computer and see if it's recognized there it could be very helpful.
(by the way the flat cables in your computer were incorrectly connected. 40 leads should be for the cd drive, 80 leads to the HD)