HP pavillion laptop locked on power up

Hi hope someone can help here....
Laptop waas working fine but for some reason is nowstarts up with a blue dialog box asking for an admin or power on password.
After several goes it now gives me a 'system disabled' dialog with the code 71086585.
Can anyone help please?
Thanks
jon
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Hi Jon,
Enter: 64984501
Regards,
DP-K
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What is the button just right of the power button on the Pavillion Laptop?

what is the button just right of the power button on the Pavillion Laptop and what does it do?
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Hi:
Below is the link to the maintenance and service guide for your notebook.
http://h10032.www1.hp.com/ctg/Manual/c03043778.pdf
Please see Chapter 2, pages 11-12 which show the buttons and label them. The button to the right of the power button is indicated to be a button to launch the web browser.
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Just for information, I have taken apart, and replaced many motherboards in laptops, laptop screens, processors, heat sinks and fans. This is the first time with a quad-core and have came across this before. I have reballed alot of HP dv6000 and DV 9000 systems and have got them back up and running.
Specs for the laptop will follow discription of problem.
What I have is a HP DV7-6165US laptop which will not boot at all which is a friend of mine laptop. I believe the battery to be dead and it does not charge when plugged in. The only light that lughts when the ac adapter is plugged in is the light right on the side where the ac adapter does plug in, usually that light stays on steady when plugged in-- on this one it constantly flashes. Nothing lights up on the laptop itself when trying to power it on, the light where the adapter plugs in on the side just keeps flashing, it shows no other life at all.
What I have tried: A hard reset, Taking out all power connections including battery, holding down power button for a minute or more plug back in nothing changes. I've bought and tried a new stick of memory, I've taken it apart and bought a new internal ac jack still nothing changed, I've reseated the heatsink and processor, and now I just tried a new board (used $200) on ebay and put it in to find out I still have the same problem. The only thing I can think of that is left is the heatsink and fan assembly or the processor unless by chance I got a used motherboard from ebay that does not work (new board $400). Does anyone here have any idea if the processor being bad or heatsink that would cause this problem--as I said the only light is where the ac adapter plugs in flashes and keeps flashing when ac adapter is plugged in (normally the light around the ac adapter stays on steady when ac is plugged in) no other lights flash when pressing power button Any help would be greatly appreciated TYVM!
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Product Number LW460UA#ABA
2.4GHz/1.5GHz VISION A8 Technology from AMD with AMD Quad-Core A8-3500M Accelerated Processor
Microprocessor Cache 4MB L2 Cache
6GB DDR3 System Memory (2 DIMM) Maximum supported = 8GB
AMD Radeon HD 6750M s Switchable graphics
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SuperMulti DVD Burner
17.3” diagonal High Definition+ HP BrightView LED Display (1600 x 900)
Network Card Integrated 10/100/1000 Gigabit Ethernet LAN Wireless Connectivity •802.11b/g/n WLAN
•Beats Audio with the HP Triple Bass Reflex Subwoofer
Full-Size Island-Style Keyboard with Integrated Numeric Keypad
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PC Card Slots External Ports •Digital Media Card Reader for Secure Digital and Multimedia cards •2 SuperSpeed USB 3.0 • 2 Universal Serial Bus (USB) 2.0 • 1 HDMI • 1 VGA (15-pin) • 1 RJ -45 (LAN) • 2 Headphone-out • 1 Microphone-in
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I am fully aware of which light you are referring to.
The document I linked to covers the flashing charger light on the notebook. In fact, nothing on the document references the light on the notebook. I apologize that my statement was not as clear as it should have been.
I highly doubt it is the motherboard or processor at this point.
Again, let me know if you have reviewed the document and tried the steps listed in the document for a continuously flashing charger light.
You have also replaced every other possible component meaning you would have been shipped a faulty component. While this is possible, I doubt it is the case. If they listed it as working, then they are held to that in most countries.
The document lists power adapter, but that is only the component being tested and not what is being referenced. It is essentially the notebooks way of saying "Hey, I'm not getting enough power".
AC power adapter LED
Continuous blinking
Power adapter
Insufficient power
Try a different power outlet.
Replace power adapter.
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HP Pavillion laptop

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Dear Customer
Welcome and Thank you for posting your query on HP Support Forum
It looks like you are facing Intermittent/Random Shutdown Issue with your Notebook and you get a Black screen when you Power it ON. I understand how it feels when things doesn't work the way we expect. We will surely provide troubleshooting assistance to resolve this issue at the earliest
According to the error message you have posted I suspect there could be a hardware issue on your Notebook
It could be possible that the Hard Drive on the Notebook could be corrupted or it might have bad sectors
Please perform the Steps as shown below:-
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OR
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c01443317
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HP pavillion laptop locked on power up

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