Glad to know who I am 'talking' to, and don't have to backtrack with technology.
But do to me nature, I probably will a little
There are so many things that could have gone wrong, that you may as well start with a diagnostic flowchart.
But let me ask a few simple things first;
1) Have you been FOLLOWING Anti-Static Precautions?
I would surmise that a PS/3 and X-Box repair would detail using Anti-Static Precautions, but do YOU follow them?
If not use the motherboard for a Frisbee, and the CPU (Processor) for a key fob.
(Ram Memory for Christmas tree decorations, lol!)
2) Did you try removing, and reinstalling the Ram Memory?
No mention of BIOS Code Beeps, so I assume you have.
Ram Memory modules ('Stick') get knocked loose easily.
Visual inspection alone will NOT do.
Best, and proven method is to remove all Ram Memory modules, and reinstall them. This way you are ASSURED that the Ram Memory modules are seated correctly, and tightly.
No BIOS Beep Codes period? Hmmm.
3) All cables are installed, and tightly?
4) Was the computer on when it hit the floor?
Ummm, not good my man.
The Read/Write heads on the Actuator Arms are spaced VERY close to the Platters, inside the harddrive.
Ummm, about .00003, or less.
That is 3 Hundred Thousandths.
An average human hair is .003 thick.
OK, moving on.................
The first thing to check is to see if the monitor cable, and monitor, are any good.
Test on a working computer, or use monitor cable, and monitor from working computer.
I believe we can pass this one, lol!
Next is to see if the graphics is good.
With a desktop computer that is using Integrated Graphics, such as the one you are working on; a graphics card is installed.
(You indicated the blue VGA port. Means to me he was plugging his monitor into it. That VGA port is Integrated Graphics. Comes from the motherboard, and not a separate graphics adapter card)
IF a graphics (adapter) card was being used, I would say replace it with a known to be good, compatible graphics card, for a test.
So lets regress for a moment;
A) You think there is a problem with the blue VGA port.
This is Integrated Graphics.
Bottom of the totem pole as far as graphics is concerned.
My advice is to have him purchase an inexpensive graphics card, and use it.
It's a win/win situation.
One you will be bypassing the motherboard graphics.
Integrated Graphics, and in this case the blue VGA port.
This way you can see if the VGA port was the problem.
Two, he upgrades the video quality of his computer, and puts a smile on his face.
What economical/inexpensive graphics card?
How about an ATI Radeon HD5400?
Not too expensive, and pretty fair graphics quality.
At least beats the heck out of Integrated Graphics,http://www.amazon.com/Radeon-HD5450-PCIe-1GB-DDR3/dp/B00B6MRJ78/ref=sr_1_55?s=electronics&ie=UTF8&qid=1360361215&sr=1-55&keywords=radeon+hd+5450http://www.ebay.com/itm/Sapphire-ATI-Radeon-HD5450-HD-5450-1GB-PCI-E-Video-Card-100292DDR3L-Low-Profile-/170723012387?pt=PCC_Video_TV_Cards&hash=item27bfe26f23
Now no board level repair may be needed.
Just food for thought.
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