Open up the case and look closely at the motherboard. You will likely find buldged electrolytic capacitor cans. If there are and you are under warranty great, but most likely it is out of warranty.
If you are savy with a soldering iron and have a high grade soldering station which includes a desoldering vacuum (it had been awhile since I have done any of this and can not think of the proper terms) you can replace the capacitors.
I would recommend replacing ALL the electrolytic capacitors. It will run about $20 available at
www.digikey.com and other component places.
When odering verify proper voltage (greater is acceptable but do not go less) and capacitance and that you observe polarity markings when you install. Somewhere at
www.tomshardware.com they discuss this.
I just opened a Dell GX270 yesterday and found this problem.
