Did you ever find out what is going on i just started having the exact same problom
was fine and plugged in all the time.. i moved to mouse to kill the screen saver no display i hard rebooted now no power plugged in or not.. battery or not.. when battery is in and plugged in or not.. i hit the power and get the red blinking light 4 times..
battery shows lowest charge when removed and button pushed.
I would check the power adapter with a voltage meter. It sounds like the adapter might be defective. The wire at the end of my adapter broke after a month or so of use. I picked up a targus replacement. The only problem since then is the targus plug is a bit loose. Best wishes
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It sounds like a key gets stuck on your keyboard, which keeps sending signals to your computer; especially as it seems fine using an external keyboard. When the laptop is off, try typing on each key a number of times, especially the 'suspect' ones, m and 0 (?)
Have you spilt Coke or coffee on it at any time??
If it's just a issue from last week then you can do one thing if you have exact idea on which date it was working fine. You must restore in to the that date or prior to that date. if have a window XP then you can type in run "C:\WINDOWS\system32\Restore\rstrui.exe" and start the process your computer to back date. And in case of Windows 7 check with this link : http://www.sevenforums.com/tutorials/700-system-restore.html
if you can restore you computer to back date when you cam was working ..then the issue will be resolved. Otherwise you may go for re-installation of the software for web-cam.
no don't replace the hard drive, you shouldn't have to if youre playing the dvd straight from the disc itself... well first off, make sure it's not getting bumped around and it's sitting flat... also make sure the dvd's your using aren't scratched or dirty... if everything like that is fine then you might just make sure that you're not running too many programs at once while your computer is playing the dvd...
There are a couple of things you can check. First be sure the battery is charged. Second, if you know the battery is good and you have the PC plugged into an outlet and your getting the exact same results, then check the plug in on the computer. Laptops have a common problem with working the plug off the motherboard when it is moved around too much. If you don't have a very good connection then it will not charge your battery and in either case will give the results like your getting now. If the plug is loose take it to a PC repair shop or where you purchased if they offer service. In many cases the plug component can be soldered back to the board and work fine. Hope this helps!