Hi all. my laptop won't turn on at all. the power box on the ac adapter has the green led on, but the laptop won't turn on. Not light flashing, no noise of fans starting nothing. What can I do please help me?

When you connect the power adapter into the laptop, does the power LED light up? If not then - The battery adapter or the adapter's power lead or the laptop's power socket could be faulty. Check power adapter's DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced. If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard.

In order to decide whether it is the AC adapter or the power input, please refer to the following article:
http://www.fixya.com/support/r6395191-troubleshooting_laptop_power_failures_ac

This article explains in detail how to diagnose the AC adapter issues.

This indicates a short in the computer or power supply. The power supply senses the problem and shuts itself off. Does the laptop run at all? More info. is needed to correctly solve your problem. Send me a message and I will help you out. Phil

remove all external peripherals. remove laptop battery. remove ac adapter.
plug ac adapter to wall power socket without the laptop connected check if the ac adapter led will stays on. if yes then connect it to the laptop and check if the ac adapter led turns off. if yes motherboard laptop has problems and need to be replaced.
if ac adapter led stays off without connecting laptop, try different wall power socket, if still ac adapter led is off then replace the ac adapter.
if ac adapter has light stays on then connected to laptop but laptop cannot even power up even the ac adapter led is on then laptop motherboard needs to be replace.

remove external peripherals. remove battery. use ac adapter alone. check if ac adapter has sufficient power or check if ac adapter led is solid green or blue. if not then ac adapter might not giving laptop enough power to power up.
if ac adapter led stays on but some problem check the ac adapter - laptop pin socket if loose or damage. if not then replace mobo.

Hi,
Verify the AC power adapter displays a solid green or blue light. Older Latitude™ C Series laptop computer AC adapters may not have a light.
Run the diagnostics on the system as follows , connect both the battery and the Ac adapter before running the diagnostics

1. Ensure the system is powered off.
   
2. Remove all external peripherals.
   
3. Press and hold the <Fn> key on the keyboard.
   
4. Continue to hold the <Fn> key while pressing the power button.
   
5. Release both buttons.
   
6. Note which lock LEDs are lit (lock LEDS are next to the power button)
   

And proceed with the troubleshooting steps listed below
http://tinyurl.com/m3k22x

Thanks for using Fixya
Proton

sounds like your charging circuit isn't working or the adapter isn't putting out enough power or amprage to fully charge the battery, or you battery went bad. if the charging circuit is bad then so is *********** board, time to burry the system and buy a new one

We had the same problem. I figured out it was NOT the main battery, but the auxilary battery. The batter life WITH the auxiliary was 68% total, when I removed the 2nd battery the battery life shot back up to 98% AND the flashing orange / red lights were gone (both on the power source and off). I then replaced the auxiliary battery with a spar back up to make SURE that it was not a fluke and with the new backup battery firmly in place the lights still did not flash. Problem solved.

When you say charge light, was that the battery led light that you were referring to or the power button?

If it is the battery led light, try this:
Try to power on your laptop without the battery in your laptop.
take out the battery and just use the ac adapter, if it works fine then there could be a problem with your battery.

If is the power button that is flashing orange, then try to power cycle laptop.
turn off laptop.
take out the battery and the ac adapter.
then while those are out, you hold down power button for atleast 10-15 seconds.
put back the power source and check the led again.

Sounds like the power jack is damaged or faulty.