Hp pavillion dv7-3065 laptop will not turn on - led light blinks, ac's light on?

HP Pavillion dv7-3065 with Windows 7.
I fell asleep two days ago, and when I woke up yesterday, my laptop was off. (The battery very well may have died while I was sleeping, or just shut off on its own. I don't know which.) I tried turning it on, but nothing happened... except for the lightning bolt (LED light) blinking three times. No noises inside, blank screen, nothing aside those three blinks.
For the record, I've already tried removing the battery. I've also tried removing the battery, removing the AC cord, and holding in the power button for 30+ seconds. It didn't work.
I've tried removing the battery and running off AC. This still doesn't work. However, the laptop recognizes that it's plugged in; the little light by it is consistantly on. I've also tested my laptop with another AC adapter just to be safe. Nothing.
My laptop has been tested without harddrive/etc, but I'm still at a blank. I don't know what else to do. My boyfriend, who's in school to be an IT, took it into his teacher, who messed around with it, and came up with a few conclusions.
He believes that because the lights are flashing, he's confidant that my motherboard is fine. He said to replace the battery, and if that doesn't work, solder the ...I forgot what exactly, but basically it's the charging connection. I forget what exactly. My apologies there.
However... I feel like replacing the battery would be a waste of money... Because regardless of battery, the laptop should still turn on with the AC cord. My boyfriend intends to bring this up and ask if he can just skip to the other thing anyway, but he doesn't have that class again for a week, and I'm at a loss of what else to do. Aside from that, his teacher says there's a limited number of other things that could be wrong...
I was hoping to get some more input...

This won't help you out, but I am experiencing the same problem... I am gonna look on this post to see if you get an answer!
I have the same problem! Except I did manage to get mine to turn on. After doing the hold the power down thing. Nothing happened. I did leave the lap top on cause I was irritated and walked away, about an hour later it came on. It let me turn it on and off a few times. Then stopped. Then leaving it sit on stopped working too

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If you have access to an Apple Store or other authorized Apple specialist with service department, you could take the computer in for diagnosis and repair under the AppleCare plan. Or the complementary coverage that comes with the computer if you did not buy the extended plan to add a few more years on the basic one. With the basic plan, you have 90-days support; if you bought the AppleCare extended plan, you have a total of three years support and service. Within the first year (from day of original purchase) you can buy the extended plan. Without it, a fee may be charged to test the computer. Or if there is an Apple Store with Genius bar, you could arrange to get an appointment there, and there should be no charge (in USA) to diagnose the problem.
You can get started online, by visiting Apple Support:
http://www.apple.com/support/contact/
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Hi there @ashirm98
Welcome to the HP Support Forums! It is a great place to find the help you need, both from other users, HP experts and other support personnel.
I understand that your notebook will not power up. I am happy to help you with this.
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Malygris1
I work on behalf of HP
Please click Accept as Solution if you feel my post solved your issue, it will help others find the solution.
Click Kudos Thumbs Up on the right to say “Thanks” for helping!

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Malygris1
I work on behalf of HP
Please click Accept as Solution if you feel my post solved your issue, it will help others find the solution.
Click Kudos Thumbs Up on the right to say “Thanks” for helping!

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Hp pavillion dv7-3065 laptop will not turn on - led light blinks, ac's light on?

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