can you add more info? will it turn off automatically while using it? which amber light is blinking? what happens when you restart the computer?

Mine is doing the same thing.  After spending hours upon hours on the phone with tech support and Dell On Call, a technician is being dispatched to check out my computer.

 

We did a complete reinstall yesterday.  They thought I had a virus.  I turn on my computer this morning, and it spontaneously shut down and the power button was blinking in amber.  I have been promised a complete reimbursement of my Dell On Call fee.

Interesting.  With all the hours (10+) I have spent on the phone and online with tech support, not one has suggested a power supply problem.  My computer usually has one sponateous shut down per day, usually in the morning within an hour of my turning it on.  It will be interesting to hear what the tech has to say.

According to the on-line Service Manual for the XPS 200, a blinking amber Power light is an indication of a power supply problem.  Click here for the information I am referring to.

For the last few years a blinking amber light on the Power switch has been the error code for power supply problems with the Dimension product line.  One would have thought they would have double checked the meaning of the error code on the XPS series.  When you get the problem resolved please post back.  I'd be curious to see if the information in the Service Manual was correct.