Laptop power wont turn on

Hello I have HP pavilion model G6 labtop  windows 7 .
the only light that comes on is when the powersupply is plugged in then the whitish blue led on computer next to powersupply port comes on.  Now when I press power button to turn on the computer this led turns off thats next to adapter connection and nothing happens with computer absolutley nothing .
please  noticed I have scored  forums for fixes before posting  and have rulled out a faulty  battery and ac adapter as I am using  comfimed working ones from friends exact same  computer.  I  have performed  the following before posting my questions  hard reset, trying with just ac adapter and or just battery still nothing .  except what I wrote above 
 I have been scoring this forum for fixes  I would really appreciate any any help or advice to try next really need my system working 
Thanks in advance for any help 
Scott

Dasmithjr sounds like you are having a similar problem except my ac/port led does not flash it just goes out when I press power button to turn on . its  very frustrating the hard reset and I have both new confirmed working battery and a/c adapter  below is my first post of my problem I added a little more to it please post if you have found any solutions as I will do the same I have  been scouring internet as I need to get this fixed asap for work 
Good luck
Scott below is a more complete of my first post 
Hello I have HP pavilion model G6 laptop  windows 7 .
I was using it fine 2 days ago I had it plugged into a/c  adapter and battery was in as that is how I use my laptop 95 % of time to keep battery full and ready in case i need it without a/c power .  I had left my computer running for about 1 hr  and came back to it and in was shut down and  still plugged in tried to restart and nothing happened . I had to leave work so packed it up and thinking that maybe power source wasn't connected and it had run down battery to empty and shut it self down. it had done this once before in 2 yrs when had plugged in to non working a/c outlet but powered right up when got home and plugged in. 
on this recent occasion After returning home I plugged it in and tried to start this is when I confirmed this very frustrating issue below that I posted earlier 
please  noticed I have scoured  this forum &  internet  for fixes before posting  and have ruled out a faulty  battery and ac adapter as I am using  confirmed working ones from friends exact same computer.   I  have first performed a hard reset multiple times to remove any residual power with no battery or a/c adapter attached and then have tried turning on multiple times with just ac adapter  or just battery  and  both still nothing 
the only light that comes on is when the power-supply is plugged in then the whitish blue led on computer next to power supply port comes on.  Now when I press power button to turn on the computer this led turns off that's next to adapter connection and nothing happens with computer absolutely nothing . I have to unplug a/c adapter and re plug in to get the whitish blue led on computer next to power port to come back on like i motioned I have confirmed this a working a/c adapter with a mutimeter and on another exact same hp laptop computer as well as battery too.
Seems to me there might be something shorting when I press power button and led goes out on computer a/c port
this is the first time this has happened I take very good care of my laptop no drops or spills  at first seemed this hard rest method would d be the magic fix or a new a/c adapter or battery but have ruled all those out.  I have also jiggled a/c adapter connection to computer to make a/c port led to go off and on but stays on pretty much confirming the a/c port jack on laptop is ok led only goes out when power button is pressed 
 I have been scouring this forum and internet  for fixes  I would really appreciate any any help or advice to try next really need my system working 
Thanks in advance for any help 
Scott

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