Try unplugging, remove battery, plug in, reboot, and run a System File Checker using this procedure: http://support.microsoft.com/kb/929833 AND, test the HDD use this procedure: http://windows.microsoft.com/en-us/windows-vista/check-your-hard-disk-for-errors If this is a recent event do a System Restore to a date before this issue. Or a Factory Restore. Have you cleaned the fan, vents, and heatsink lately? Has there been ANY damage? Drop? Post results
SOURCE: laptop boots then shuts automatically off
If you haven't tried it yet, pull the battery out and try booting from the adaptor only.
If it boots normally, then your battery pack may be bad (shorted cell) or the regulator that has the job of charging and monitoring the battery pack while keeping your system running may not be healthy.
If you own any multimeter (at the cost of Chinese DMMs, everyone should own one), check the battery pack for charge.
Under normal conditions, they should measure a couple of percent higher than their rating.
You will have either Lithium Ion or Nickle metal hydride batteries in the pack so should measure some multiple of the nominal cell voltage of one of those types that are respectively 3.6 & 1.2 volts.
SOURCE: Sony Vaio VGN-N250E/W Not Booting/Responding
Take the battery and power supply out and hold down the power button for 30 seconds. This will reset your hardware settings. Your backup battery isnt your problem. Does your battery light turn on when charging? Does your keyboard lights light up when it runs for a second (try pressing caps lock)?
SOURCE: Qosmio G35-AV600 boot problems
You will have to reinstall both its BIOS and operating system, only that can properly solve the problem.
I my solution was helpful, Kindly accept it.
Thank You,
Arjun
SOURCE: HP Laptop DV2415NR Need to power on twice to boot.
log in your bois and make sure first boot option is hard drive. not cd/usb or anything else. unless you need to
SOURCE: Laptop won't boot up
1 suggestion.
Inside your laptop is a processor. The Cooling Fan, and Air Intake Duct you mentioned, are part of the cooling system. The main job for the cooling system, is to keep the processor at a reasonable operating temperature.
When a processor becomes too hot it turns off. (Actually BIOS turns it off)
With the amount of foreign debris you mentioned, (Dust/Dirt/Hair/Carpet Deodorizer/Food Crumbs/Lint, are a few examples of foreign debris), the Cooling Tube may be clogged.
Just using a can of compressed air for computers, in the Air Intake Duct, (DO NOT blow into the Exhaust Duct!), may not be enough.
Generally the Cooling Tube is about the width of your finger, and the height is half the thickness of a finger. Pretty small tube, and easily clogged. Also the Heatsink at the end of the cooling tube, can become clogged.
Laptops have a poor cooling design anyway. Everything is crammed into one tiny box. They use a small fan to cool them, and the Air Intake Duct is typically located on the bottom. (Some are on the side) This is a good (?) area to inhale readily available foreign debris.
On the link below the last photo on the page, shows an average Cooling Tube that is attached to a Heatsink.
http://www.insidemylaptop.com/clean-cooling-module-acer-aspire-3620/
This requires opening the laptop, and physically removing the foreign debris. Typical method is a combination of Q-tips, and Isopropyl Alcohol, plus a can of compressed air.
(AC adapter {Charger} removed, battery removed. Use an ESD wrist strap, and connect it's alligator clip to a good ground)
By the way. You DID have the AC adapter, (Charger), disconnected, and battery out, when you used the can of compressed air, right?
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