My Asus x44l laptop won't start up. When I hit the power button a couple of the lights come on for a split second and then die. When I have it plugged in it says the battery is charging.

SOURCE: latitude d505 not charging

If the system runs using the AC adapter, but the battery doesn't hold a charge and the battery indicator LED flashes orange, then replace the battery (A battery with an internal failure may flash 4 times orange then once green and repeat)

The normal lifespan of a PC battery is 300 to 500 recharge/discharge cycles (roughly 12 to 18 months)

SOURCE: My Acer Aspire 5000 won't

hi i just refurbished an acer 5000 laptop..everytime i try to install windows it shuts down after 10% start....i have changed hdrive, memory..etc....

results found same laptop works 100% when installing linux mint !!

go figure ?????

regards tonster

SOURCE: Laptop will not boot. The power light flashes

CLICK HERE
the codes which you see are universal for all the dell laptops. find the appropriate. this will solve your purpose and guide you how to go furthur.

SOURCE: C500 Laptop won't come on power button just flashes

Have you tried attaching an external monitor when the LCD screen is disconnected from the motherboard? this connector is located under the keyboard strip – a piece of plastic just above the keyboard.
If it works, this way, then the video cable isn’t seated properly in the connector on the back of the screen. Plugging the video cable back in should fix the problem.
I don’t know how comfortable you are with taking apart laptops but I think that this information could be useful for you.
Source: http://www.asklaptopfreak.com/laptop-notebook-help/2006/08/08/laptop-powers-on-and-shuts-off-immediately/

SOURCE: Hellow Dear, My acer aspire 4935

First, you need to make sure your power adapter is providing enough power to both run the laptop & charge the battery. A very good way to do this is to compare your laptop voltage & ampere requirements (written on a sticker on the bottom of the laptop) with the voltage & ampere ratings of the power adapter. Voltages should be the same, or the power adapter's voltage about up to 0.5 volts more than the laptop's voltage rating. Amperage of the power adapter should be at least equal to or greater than the laptop's rating. It should never be less than the laptop's rating, or else the power adapter will be providing insufficient amperes to charge the battery. Of course, the power adapter's nominal amperage might be ok, but it degraded on usage. You can verify this by testing using a good or new power adapter.
If the battery did not charge using the new power adapter, take the battery off the laptop, & using a dry tooth brush, scrub in between the fins of the battery connector on the motherboard & on the battery it self, then put the battery back into the laptop & try again.
If this still did not resolve the problem, then the battery itself could be bad. Try it on another laptop, or try a good or new battery in your laptop.
If this did not work, there might be a possibility that the charging circuitry on the laptop's motherboard is defective & needs servicing. In order to do this, the laptop needs to be disassembled & the motherboard checked for defective/burned out components in the area near the DC jack. Any defective/burned out components found should be replaced, or you might need to replace the laptop's motherboard altogether.