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Fist touching anything on the motherboard without a anti-static strap can kill the motherboard.
The fan running at full speed is no big deal. If you took out the video card how do you expect to see anything on the monitor.
You need to plug the monitor you have into a working computer, this will rule out the monitor. If the monitor died, you did all this for nothing.
Now unless the motherboard has onboard video you have to put the card back in, if it does have onboard, even without the drivers installed you still see the post, because windows will let it run at post, and with the video card, it will still show post without drivers.
Do this,check monitor, try both ports and post back and tell us whats going on.
its not the relephone plug the 24 v wires sound about right i believe the telephone plug would be for credit/debit card sales via a built in modem and magnetic card reader hook up the wires first by stripping them back and electrical taping them together put drawer in and plug it in should work if not switch wires try again once it works either solder or use a **** conector or wire nut and tape to ensure it doesnt ground out
Kindly un-install both the drivers for blue-tooth and wireless card from your computer. Just right click on each driver in the device manager select remove or un-install. Restart your computer and re-download the drivers from the dell support site.
Note: dell support site would only contain drivers , for your xps system h/w that came from dell. if you have attached the wireless and blue-tooth later , you might need to download them from manufacturer website
Problem solved. inside this computer there are a set of dip switches a block of 4 top middle of circuit board, 1 up 3down, what i did was to switch all switches to the the up posistion, and not having a clue what would happen.
Ureka the computer came on, if you switch of and switch on again comp becomes operative at once, depending how long you leave it off the longer it takes to come on.
Example if it is switched off say overnight it will take about 2.5 mins to come on, it seem that the comp is doing some sought of self checking. I could play around with those dip switches but as it is now working and i understand what is happening (I think) i will leave well alone.