My name is Rohit and I work for the Social Media and Community Team at Dell.
I regret to hear that you are facing an issue with your dell system. For No Power issue you can try reseating the battery from back and try to power on system only on Ac Adaptor and you can also try reseating the memory, you will get the manuals on http://dell.to/OhUh34. After reseating the memory if you get any beeps codes or if you get any other error message please share with us.
Please reply back with the results.
Glad to assist you!
Thanks and regards
Dell Social Media Responder