Try to drain the residual power from the laptop:
-Disconnect any external peripherals (flash drives, printers, external hard drives) from the computer
-Then remove the adapter and the battery
-Press and hold the power button for 10 seconds
-Reconnect the battery and the adapter
-Try to restart the computer and check
If the system powers back on, then I would suggest you to run the Dell Diagnostics to check the hardware functionality. Power off the computer -> restart the computer, press 'F12' key on the Dell logo -> Select 'Diagnostics' from the boot menu.
Thanks and Regards,
I have a Dell xps l702x laptop running windows 7 home.
It has run fine until yesterday. Tried to boot it up and the dvd made noise and then the cpu fan came on and then nothing else. None of the normal lights came on and nothing on the monitor nor did it try to post. In trying to shut it down I held the power button for a while but it would not turn back off. I had to unplug the power supply and take out the battery.
Thanks for anyones help.