Laptop won't boot, no diagnostics or errors

HP Pavillion dv6-6c54nr
Win7 Home x64
  We've had the laptop for 2-3 months and it was working fine.  Now it just won't boot up.  No lights, no progress, no fan/hard drive activitiy.  Nothing.  Basically, hitting the PowerOn button does nothing.
  The only light that will display is the one near the power cord input, when the power cord is plugged in. 
  I have searched the forums and attempted the following, with no success.
-hard reset,
-using the battery only,
-using the power cord only,
-popping out the memory modules and trying one at a time in each slot.
  When I took the cover off to access the RAM modules, I noticed the component that is left of the memory modules and above the DVD drive had a cable popped off.  It has a black cable labeled #1 and a white cable labeled #2.  The black cable is the one that was off.
  I tried to put it back and manually hold it in place with a non-conductive material (a dry-erase eraser...basically compressed styrofoam) while I re-plugged the power and attempted to boot-up.  This didn't fix the problem either.
   I've exhausted all the relevant online help and forum suggestions that I could find.  Given the boot problem and the bad connector I'm wondering if I just got a bad unit with poor soldering and some other component also got loose that is preventing the system to boot up.
   I appreciate any additional suggestions to debug this, plus any resolution actions from HP about a replacement.   Thanks in advance!

That cable you saw was the antenna for the wireless. If you tried to reconnect the wiress antenna while the laptop is running you very well could have shocked the wireless card which bolts right into the motherboard. The wire should be connected to the wireless card before attempting to boot up. This is not an official HP Support channel so you need to contact HP Support about sending it in. I would kind of gloss over the whole disconnected wire thing when discussing it with the Tech. Your warranty should cover it (I hope). It also sounds like it was already dead before you noticed the displaced antenna wire so I am thinking nothing you did made the problem any worse.

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