Computer does not turn on, power LED goes off when power button is pressed

My Pavilion 17-e078nr has stopped working, it will not power on. When you push the power button, the power LED next to where the plug is goes off and takes several minutes before it comes back on. I've tried removing the battery and get the same results and with the batter in and AC disconnected the power button does nothing. I've also tried the hard reset with no luck. As far as I know, nothing has happened to the computer since last time it worked. My two theories are either the AC power is bad, or there is a problem internal to the laptop. The AC power is providing the 19.5V, I measured it using a multi meter, I'm just not sure if it's providing the required wattage, or if the connection to the laptop is secure, it feels a little loose, but at the same time the LED comes on, so I know it's getting a connection. Only thing I can think to try is go to a store that sells this type of computer and see if I can use one of their power supplies to power my computer, and/or plug my supply into one of their computers. Don't know how willing any store would be to allow me to do that though. Any one have any additional thoughts or advise?

Hi! I have the exact same problem... the LED on adapter, is very, very dim when connected.
At first I tried connecting my macbook to my roommate's adapter and had the same problem. then tried taking out the battery, and still had the same problem. I did the same thing with my roommate's macbook, but hers did actually turn on! it operated without the battery. Figured out it was problem with mine.
I kept on trying combinations battery, computer and adapter. turns our that my battery (which I thought at first was the problem) charges perfectly on my roommates mac, but wont charge on mine. her adapter won't work either on my computer. What I've been doing is charging my battery on her computer, then placing it on my mac, and it works. only thing that won't work is the adapter.
Went to a mac store, and they told me that the problem was a small cable o wire that went from the Magsafe point into the mac and that the LED was very dim because no energy was being drawn from that spot because of this little wire being broken. they gave me the name of this wire... very technical stuff so, completely forgot cause I didn't have anything near to write on.
I'd like to know if anyone has gone through this same ordeal, and had this wire replaced without any problems. When it comes to opening up my mac, I'm a bit skeptical, since warranty is expired and wouldn't want for a solution to become a bigger problem.

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