DV4 flashing caps lock and num lock lights

My laptop, an HP Pavilion DV4-2040US, has stopped booting up recently. The day before this problem come about I was using the laptop perfectly fine. I then went one day without using. When I turn on the laptop it booted up but nothing showed up on the screen. Then the CAPS LOCK and NUM LOCK lights started to blink on and off.
I did some researching about the blinking lights and what they mean but I don't think mine is listed on there. It says the pattern will repeat a couple of times then shut off, but mine doesn't. The pattern is the CAPS LOCK and NUM LOCK both blink once every 3 seconds (about) and keeps blinking every 3 seconds forever. The only time they stop blinking is when I shut I down by holding the power button on the laptop.
I've tried disconnecting everything and holding for 15 seconds and even tried holding it for 30 seconds and that still didn't fix the problem. I called HP support and the guy who I talked to told me it sounded like a motherboard issue, but he wasn't sure exactly and told me to ask here for help.
If it matters, I can hear the fan turn on for about 2 seconds then stop. Also all the touch sensitive buttons light up too$

Please, someone, anyone help me. I am having this exact same problem as we speak It happened after i put the laptop to sleep overnight. The LEDs for capslock and numlock blink consistently but slowly-approximatelt 2-3 seconds. When started up, i hear the fan come on for maybe a second or two and then comes off.I've tried all the mentioned solutions - i removed the battery for a while and put it back in-i tried the four arrows-i tried started up with AC adapted but without battery - and still no fix. What i am worried about is the documents and files on the laptop. Are they recoverable? Please help me on this someone. Please. Thank You.

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