Scroll & Caps Lock blinking - DV4-1120 does not boot. :-(

My dv4-1120US had stopped working - I had opened it up (following the instructions in the manual) and put it back together after cleaning the inside (fan, etc.) with compressed air. After I put it back together and turned it on, the main LEDs came on - the fan turned on for a few secs - and nothing happens beyond that, although the scroll and cap light blinks - it blinks once every sec s three times, and then pauses for three secs and then repeats .... 
I removed the power, removedthe batteries, reset the machine, and even removed the cmos battery and reinstalled it, and reseated the RAM - but to no avail.
Any ideas?
Why did I open my computer?:- My dv4-1120 US has been running hot / warm with a loud fan noise for a few mos, but recently it started turning itself off intermittently (no pattern). I wanted to clean the insides in case there was dust that was causing this issue. That's the reason why I opened the computer.
Appreciate your insight.

http://h10025.www1.hp.com/ewfrf/wc/document?docnam​e=c01443366&cc=us&dlc=en&lc=en&jumpid=reg_R1002_US​...
Good news for the person with the 3 blinks... it is the memory and if you have working RAM (and compatible!) you should be able to get it work... Bad news for me... mine does not stop blinking and they do not have LED error code description for me.  Which tells me I'm completly screwed if the LED error code does not function correctly...

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