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You didn't post the Make, Model of Laptop or the OS you are using. I'll use a Win 7 solution. Boot the Laptop, open the Control Panel, select Power Options, set to High Performance, select Change Plan Settings, set SLEEP to Never, select Change Advanced Power settings, go through the settings , set SLEEP and Hibernate to Never, Power buttons and Lid to shut down. Always shut down and unplug your laptop when not in use to prevent damage from power surges and possible Fire hazard IF the battery malfunctions. A reboot every day will reset the computer.
If your pc will not turn on immediately it is possible that your laptop is overheating. Try using compressed air and blow out dust and dirt. If it still does not work, you have a faulty cooling system.
Remove the battery and leave off for about 1 minute. Put the battery back in place and press the power button to turn the unit on. immediately after you see system light come on, press and hold the power button and see if it shuts off after a few seconds. If not, then its likely your motherboard is defective.
How long does it stay on for? I had a similar problem. Mine would stay on for 10min then shut down. It ended up being an excessive build-up of dust around the cooling fan. If your problem is similar its worth taking a look at. Good luck, Todd
1. remove all ext peripherals 2. remove battery 3. check first the ac adapter if it has led on (make sure ac adapter is not connected to the laptop) 4. try any other wall socket check if ac adapter will led stay on 5. if ac adapter stayed on then connect to laptop (without the batter) 6. after connecting the ac adapter to laptop check if the ac adapter led turned off, if yes then check ac adapter laptop pin on the side if is loose or damage. 7. if ac adapter stayed on after connecting to laptop press now the power button on the laptop just once. check if the power led on laptop will turn on (check if power led stays on or it blinks amber) 8. if it blinks amber then remove all CRUs such as dvd drive, memory, hard drive and wireless cards. put them back one at a time. make sure you turn off laptop when putting removed hardware. this will check and isolate which causing the power led to blink. 9. if the power led stays on then turn it off again then wait a couple of seconds then press and hold on Fn key then press power button. wait for about 5 minutes while the power led is steady on, until you hear beeps once you hear beeps it means that LCD has problems. try then connecting laptop to an external monitor if it shows display there. press on Fn + F8 to toggle the display from LCD laptop to the ext monitor. if no display replace the motherboard. if it has display replace LCD.
remove the battery and ac adapter and hold the power button for 10 sec and remove all the external devices and connect the battery and ac adapter and try if no try diffrent diffrent ac adapter or wall unit