HP HDX18t light up but wont boot. Blinks once

I own a HP HDX18t
Windows Vista SP1
8 Cell Lithum Battery
9600 M GT Graphic
Intel Core 2 Duo Processor P6700 (2.53)
Purchased new online in May 2009.
Laptop lights will come on when pushing power on button and I can hear it starting but after a few seconds lights by capslock and numlock begin to blink. Sequence appears to be one blink, then about 2 second pause, then one blink again, then it repeats. I've taken battery out, waited a few minutes and replaced. I have take battery out, held down power button for 60 seconds, then replaced battery. I have tried powering on with battery removed. No matter what I do, it's the same results as stated above.
When ordering I got the graphics card upgrade, but applications that utilize the card crash the laptop in a few minutes from overheating, so I just stopped using graphics intensive applications. Volume controls stick often going all the way up or all the way down with one momentary press of the button. Power cord connection has worn out so much that I purchased a new battery charger, but it still fits in loosely. I had been using the new charge for about a month before today when it wont even turn on. I was considering ordering the dc power interface that's built into the laptop because even with new batter charger you had to wiggle it just right to get the light to come on showing that it was charging.
All this I can live with or work on later and I only mention it in case it pertains to the major problem of not being able to start the laptop. Forum searchs suggested that "one blink" indicates a CPU failure, so I'm looking for confirmation on that.
I have a fair amout of experience building desktop PCs from scrach but have not yet attempted repairs or upgrades on laptops.
Any help is appreciated.

I have worked on the HDX18 series quite a bit buying up old used ones and rebuilding them.
I am not familiar with the codes, but CPU failure is rare, remove one stick of RAM and see if it will boot up, if not try the other stick. It also sounds like a corrupted BIOS and I have a fix for that too, if it's not too far gone.
The cooling vents need cleaning out and some new thermal greece applied and possibly some new thermal pads, that should solve the overheating and crashing problems, IC Diamond is great.
The power plug on the laptop is not part of the MoBo and e-bay has tons of these.
http://www.ebay.com/sch/i.html?_trkparms=65%253A12%257C66%253A4%257C39%253A1%257C72%253A5559&rt=nc&_...
http://www.ebay.com/itm/New-DC-IN-Cable-Power-Jack-HP-Pavilion-DV8-HDX18-Series-/300572963177?pt=LH_...
HP Media Services Library to take it apart.
http://h20574.www2.hp.com/default.htm?lang=en&cc=US&hpappid=psml
A thread from me to help address the volume OSD problems, there are some youtube videos there as well to help get it apart. The most difficult is the speaker cover and the hot key bezel around the keyboard.
http://h30434.www3.hp.com/t5/Notebook-Hardware/dv8-and-HDX-Series-OSD-Pop-Up-Solution/td-p/816295

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Tiger 4.6 won't install - keeps restarting but wont boot from the dvd

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[email protected]

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Sure it is a 2.4 MBP The last before it went with the swipe twist and has express slot.
Early 2008.
The hard drive had zero space on it at one time and DW said it had no where to write the new rebuild, but I was unable to delete anything from it, I could however copy and move files from it but not delete. It now has free space as I was able to delete at one point during this process.
The other important thing is, the one time I was able to boot from it, mail kept quiting and logic just froze the system, so am hoping maybe OYNX could help too with DW? I also use this for my web site using rapid weaver.
As well, many of the software plug ins are huge and would take a long time to reinstall, just FYI.
The HD is WD. It is Leopard 10.5.8 (also the one tied to my iPhone).
It is showing on the desktop now. If I do a disk util, it is grayed out. But after the rebuild it said it was fine and I was able to delete some files. The OS I boot to is 10.5.7, all the time the repair permissions have been grayed out. I am basically back to where I was last night before using DISK WARRIOR and wondered if I should have tried CC it to another HD and see what happened, but did not.
So what else can I tell you? The partition I need is 10.5.8, would upgrading this 5.7 to 5.8 make a difference? Surely there must be a way to get this to work. The HD is a little over a year old, never moves. Neither does the MBP for that matter. It used to move a bit but not that much anymore.
I did not install all my logic and things on snow as the open GL was slower than leopard, plus it had trouble playing back movies online, ABC, NBC.
Basically I want to be able to boot to this HD but when I try, the Mac just shuts down and as mentioned before DW says it is locked.
Two External HD's
Old one 500GB
Partition 1 (the one that seems to be failing) has four partitions on it.
Leopard 10.5.8 (what I need)
Clean Snow install
Partition 4 is a copy of my SL so if I wanted to reinstall I would not have to look for it.
The new HD 1 Terabyte
Snow Leopard with migrations assistant
Free Space
And what I am using now, 10.5.7.
Then of course, on the mac itself is 10.4, Tiger, which I never use any more but does have important info on it.
I also have a USB HD that I could use for Time Machine, but think it's only 150GB or so,
The partion I need to boot, 10.5.8 is 167GB on older external 1 year and has 5,5 GB free now.
I thought maybe snow leopard with migration assitant but is only 250 GB, or I could wipe it, do a new install and migration asst into it as a last resort, What say you.
Thanks
Free Space.
Message was edited by: avidfcp

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Niall Mallyon wrote:
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