The first thing I would do after I copied off all personal info, is to smash that computer into little tiny pieces, pack it in a box, and ship it to Peckerd Bell. "Here.........this is whqat I think of your computers, and your 'support'." (Support = $$$$$$)
OH, did I say that out loud? My bad. lol!
I love the nomenclature you used Jan. You are definitely my kind of people! (Power box)
1) Let's go back to the beginning Jan, and look at the 3 power cables to motherboard;http://www.ebay.co.uk/itm/PACKARD-BELL-Winfast-MCP61DM2MA-8ERS2H-AM2-/130457057251?nma=true&si=BtiiltyOkHpDiIr8VnpbUWON7BQ%3D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
I see that a 24-pin ATX main power cable, plugs into the motherboard,http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24
[NOTE* Color of connectors does NOT matter]
,and a 4-pin ATX +12 Volt power cable,http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4
Yours plugs into the white square 4-socket hole connector, that is by the Top/Left corner of the motherboard.
That's it for power cables from Power Supply, TO motherboard.
The SATA harddrive also requires a power cable. A SATA power cable,http://www.playtool.com/pages/psuconnectors/connectors.html#sata
Note that a SATA power cable's connector has 15 contact pins.
Between it, and a SATA data cable, it has the longer connector.
A SATA data cable's connector has 7-pins,http://en.wikipedia.org/wiki/File:SATA_ports.jpg
The SATA data cable example is at top.
A SATA motherboard connector example is at bottom.
YOUR SATA connectors look different. They are the two Blue connectors below the Ram Memory slots, and to the left of the black round piezo buzzer.
Note the L-shaped opening of the SATA data cable connector.
The SATA power cable connector also has this L-shaped opening.
Lines up with the L-shape on the motherboard connector, or Harddrive, or Optical Drive, connector.
The SATA data cable connector, and the SATA power cable connector; may also have a Lock on them.
Usually a small bulb type of affair, that you depress with your thumb.
Depress the Lock to install, or remove.
The SATA cable connector, power or data; that goes to the Harddrive, or Optical Drive; is usually a 90 degree bent elbow.
The connector end of the SATA data cable to motherboard; is a Straight connector.
The front of your computer is the Front Panel.
The area of contact pins on the motherboard, that the main wires from the Front Panel go to, is the Front Panel header.
Sometimes abbreviated as FP_PANEL, or FP, or FP1, or PANEL; just to name a few abbreviations.
Does it look like this Jan?http://www.intel.com/support/motherboards/desktop/sb/CS-009016.htm
Wiring from the Front Panel.
No easy guessing game here. Color code you have MAY be right, may be not.
Remove the Front Panel. See where the wires lead up to.
Wires that go to the Power On switch, and Power On LED, may be in the same area; but the HDD LED is away from them, and should be easy to spot.
Now you are down to the Power On switch, and Power On LED wires.
Suggest process of elimination.
It's usually pretty easy to see where the Power On LED wires go.
Right TO the Power On LED.
Now you know the other wires are for the Power On switch.
Then remove all wires from the Front Panel header.
According to the info I posted in the link, the Red area's 2 pins are for the Power On switch.
BRIEFLY touch a small flat tipped Jewelers screwdriver, to those 2 pins.
(I state Briefly because the Power On switch is a Momentary Contact Switch. No more than 2 seconds)
Power Supply still doesn't come on?
Then post back in a Comment, and I will state out the simple procedure for testing if the problem is the Power Supply.
For additional questions please post in a Comment.
(It also may be that the 'power box' you are trying to use, doesn't have enough Wattage for that Motherboard/Processor/Ram Memory)