Flashing LEDs No Boot Presario CQ40

I have a Compaq Presario CQ40-107AU that will not boot. After pressing the power button, the fan starts running and nothing happens for several seconds. After approximately 20 seconds the LEDs above Scroll Lock and next to Caps Lock blink continously.
I found explinations of the blink codes somewhere online and found that the code was supposed to mean low power from the power adapter. I purchased a new (non-OEM) adapter and have the same issue. I tried a hard reset (removed the battery, disconnected power adapter and held the power button) doing this did not resolve the issue.
I am going to pop the case open tonight and verify all connections and visually inspect the solder and board where the power adapter mates to the notebook and was wondering if anyone has any suggestions for me. I am unable to find this paticular model listed in any of the support areas on HP's support site.

Hi, i just experience the same symptom (CQ40).  I tried to solve by myself by following the document, but it doesn't mention about continuous blinking at CapsLock & Num Lock.  I also check my output adapter voltage, no wrong about it (18.5V).  Memory card and hardisk drive also fit properly.  Then, i tried to reset my bios by take out the bios battery, still not help.  The pcb condition include pattern and components by visual check all ok, no sign of burn.  Is there any meaning for continuous blinking at CapsLock & NumLock?  Please help me... Thank you.

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