TX2517ca, wont Boot - Blinking blue LED lights - Num Lock & Caps Lock

notebook just decided NOT to boot one day..I can hear the fan and very minimal HDD activity. I've tried the Hard reset as directed by HP and removed the battery etc...  the lights blink exactly the same time, stay on for 1 sec, and the off for 3 seconds and then blink simultaneously again, and doesn't stop till I pull the power, there is no clicking, grinding, beeping nothing, nothing on the screen at all. The rest of the lighted buttons are solid blue.
FYI, I am a computer technician of 15 years...home based at this time. so I have pulled the memory, cleaned them, 2 (1GB & 2Gb), compress air dried them and blue out the slots and reseated even by doing only 1 at a time, no change, same end result, blinking LED's. So I just pulled the Hard drive, connected it to another machine as an external HDD, it works fine, I can see the C drive and the Recovery drive without any problems. so at this point I have just pulled the battery from the board and will leave for a while to see if we can drain the BIOS/CMOS (wondering if software is stuck in hibernate or sleep and when powering on is only returning to similiar state, but wouldn't account for no screen display...) everything so far is pointing to CPU I would think. Next after replacing existing Hard drive and try booting if that doesn't work, I have a working blank Hard drive I can insert to try for the hell of it...stay tuned...
Oh, also system is immaculate, no collected hair or dust in fan ports etc..
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Hi,
Check the link below:
Blank Screen LED Error Codes
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