Posted 13 June 2009 - 08:38 PM
I would say you definitely have a hardware issue there. It's not going far enough into the boot process for it to be a software issue. Its not going to be easy to find either with this being a laptop. There's really on 4 easy things for you to check: hard drive, memory, battery, and DVD drive.
For the battery, the only way to check it would be if your laptop is designed so that it can be turned on while plugged into the wall without the battery actually in it. If it can, then try it. If it reboots without the battery actually even installed while plugged into the wall, then your battery is not the likely cause.
For the DVD drive, remove it from the laptop and see if it'll boot then. DVD drives are normally secured in a laptop by one or more screws that can be found on the bottom of the case directly under the drive itself. Remove that screw and the drive should be able to be slid right out the side.
For the memory, find a friend with a laptop using the same type of memory. Put your memory in the other laptop and take the borrowed memory and put it in your laptop. See if the problem follows the memory. If you're running vista, you most likely have DDR2 ram, but all you need to do is get a friend's memory and check the labels on the memory. If one doesn't have a label, you can compare the pin layout on the dimms. DDR and DDR2 have very similar layouts with the notch being only one or two pins off between the two types.
For the hard drive, ........... other than taking the drive and hooking it up to another computer (either another laptop internally which I wouldn't recommend, or by finding an external enclosure for it and hooking it up externally to another computer) then using a drive testing program to test it. Other than that, there isn't much you can do that's easily done to verify the hard drive is good.
And, finally, if none of this works, I'd recommend paying for repairs or buying a new laptop and turning this one into a paper weight. It could be something as simple as a bad fan or as complex as a faulty motherboard or cpu. Either way, it means popping the case open which is not easy to do if you're not experienced at it.
What's more irrational--a guy who believes in a God he cannot see or a guy who is offended by a God he doesn't believe in?