Comment by fixyaid, posted on May 11, 2008
I tried, using the AC adaptor, to turn the computer on. The green “power” light goes on and there’s a brief sound(less than 6 seconds) like that of a disk drive starting up. But that’s it. There is no screen image and no other disk drive-like sounds. I thought that it might be an auto-off due to a low battery. But, since I don’t have a screen image, I can’t tell the level of the battery. Is this a power supply issue?
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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
Ensure the system is powered off.
Remove all external peripherals.
Press and hold the <Fn> key on the keyboard.
Continue to hold the <Fn> key while pressing the power button.
Release both buttons.
Note which lock LEDs are lit (lock LEDS are next to the power button)
Please turn off the Computer and disconnect the AC Adaptor then remove the Battery. Next, try cleaning the metal contacts on the Battery and reseating the RAM modules.Then, connect only AC Adaptor to the Computer and try to turn it ON without the Battery. If the Computer doesn't turn ON then disconnect the AC Adaptor and insert the Battery then try turning ON the Computer. If the issue persists even after performing all the above steps then service will be required.
look here the problem can be of two types,,first the problem can be of the adapter or the port in the computer where the adapter pluggs in the computer,,look for any friends or relatives using the same computer with the same good adapter,,plugg it into the computer,,if u dnt c the problem then prob with the adapter or else prob with motherboard
Hook up your power adaptor to ac power without it being hooked up to the laptop and see if the green light stays on. If it does then you know your adaptor is okay. if your adaptor is only hooked up to ac power and the green light still turns off then you know your ac adaptor is bad.
Take out the battery from your laptop. Now hook up the ac adaptor to the laptop and if it stays green then you know your battery is bad but you also want to make sure you can get your laptop to turn on. Hopefully it will turn on with only the ac adaptor hooked up to it.
1:) the battery is dead, and needs to be replaced ( suggest e-bay china seller for cheapest )
2:) the AC adaptor or dc socket on the motherboard is Faulty.
3:) motherboard fault, regarding charging circuit board.
Go for the most cost effective option First. New Battery. Then AC Adaptor. Finally would be motherboard replacement.
Try turning on the system without the AC adaptor. If it doesn't work on battery, then try pressing and holding the power key (after removing the battery) for 30 seconds.
Now attach the AC adaptor and try to power on.
If it doesn't work, it sounds like either a motherboard issue or an AC adaptor issue (possibly there isn't enough voltage being supplied) but it's an odd problem. I hope I helped.
Stay spicy, and happy lappying! :)
Although symptom is showing that AC Adaptor is not working as its not providing power to the unit. I will suggest you to perform some basic troubleshooting steps. Check if outlet is working if not check with known working outlet. If you have a multimeter you can the output of the AC adaptor.
Also you can perform full power cycle and component discharge. Take the battery out and disconnect the AC adaptor press the power button and hold about 7 seconds. After that put the AC adaptor in and test again.
If issue persist take to nearest Service center check with known working AC adaptor. After that I believe you will figure out the best solution.
Look at the power indicator. If it is not lit, no power is being supplied to the computer. Check the following:
If you are using on the battery, it may be low and unable to power the computer. Connect the AC adaptor to recharge the battery pack.
Make sure that the AC adaptor is properly plugged into the computer and to the power outlet.
If it is lit, check the following:
Is a non-bootable (non-system) disk in the external USB floppy drive?
Remove or replace it with a system disk and press <Ctrl> + <Alt> +<Del> to restart the system.
The computer's power management system automatically blanks the screen to save power. Press any key to turn the display back on. If pressing a key does not turn the display back on, three things might be the cause:
The brightness level might be too low. Press <Fn> + <→> (increase) to adjust the brightness level.
The display device might be set to an external monitor. Press the display toggle hot key <Fn> + <F5> to toggle the display back to the computer.
If the Sleep indicator is lit, the computer is in Sleep mode. Press and release the power button to resume.