When I turn on my laptop, it be on for 30 minutes  and then turned off. why?
957989
You need to change the power options under the control panel. To do this:\n\n1. Open the control panel and double click on 'Power Options'\n\n2. In the 'Power Options' window, you will see the options (time interval) to turn off your monitor, hard disc etc. The values you see are the default.\n\n3. Change these to suit your need.
926062
It could mean that your computer is in Stand By mode and the best way to removed it out of stand bye is to hit a button on the keyboard or move the mouse. If it dosent work, and if you already tried to restart it, unplug it (everything, including the power supply on the back of the computer) , and hold the power button for 10 seconds and then plug it back back
176164
If your computer is making a noise when it comes out of standby, then that is probably your hard drive restarting. The hard drive is shut off during standby.  It's normal.\n\nAs for why it's taking so long to think, then I agree with the others.  More RAM usually fixes that.
580663
Are you turning the computer OFF or STANDBY?
230512
There is a piece of hardware in the back of the computer called a Power Supply. It converts the electricity from the wall into something the computer can handle. The Power Supply also has a off switch. If you hit that all electricity ceases to your computer, thus making it impossible for the computer to turn on. When that light is on it means the computer is receiving electricity.
497407
Off of coure is it's for hours but for short piorod's of time it wont hurt to leave it on. But even you computer needs it's sleep some times it will help it! Just like sleep hepls you! Plus you save on your power bill!
1039508
I leave mine on all the time and the dell guy told me to turn it off a couple of hours a day.\n\nMake sure you have a screen saver that moves or something because if the screen sits to long it can burn the image into your monitor
580265
Depends how long have you had it ?\n\nAnd your operation habits \ndo u normally charge it while its half empty ?\nare you always using it on ac power or battery power , i work in a company where we have 30 laptops the same brands and the time varies.\n\nalways charge it when its empty only and if u have a power source try removing the battery .\n\nthese things increase the life time of the battery....
1118701
Same thing happened to me. If you see the screen in the beginning and then it turns off, it's because you changed the settings. The only thing I could do was reboot the hard drive with a fresh copy of XP and adjust the settings differently.
161894
i have set my monitor off after 2 minutes.but it doesnt work unless i refresh it(go to setting and click ok).and wait for 2 minutes to test.it works like this for me.check for u.
631021
try CPU (processor) cooler there is an sensor under the cpu socket on the mainboard so when the cpu gets hot it turn`s off the pc and wont turn it back on until it gets cooled down,since you power it manualy
637189
There could be issue with the BIOS. Check for your computer Motherboard vendor.\n\nThere could be BIOS update.\n\nSynchronizing the time online is a temporary solution. Once you disconnect from Internet it will again go back.
711735
Check the AV cable ( should be the blue ended cable that attaches to the Computer Tower)\n\nmake sure that is connected sercurely, Try moving the mouse, some monitors have a power saving feature where they will dim to save power...To turn this off \n\nControl Panel > Power Options > There should then be a box about power saving on the monitor un tick it.\n\nAlso if your using a flatscreen monitor chances are that it is backlighted...This could be an indication that your backlight is on it's way out and you may need to replace it.
963282
you said your laptop is 3 years old. if the battery is of the same age you're a lucky person. a battery seldom last that long when used daily (that's my personal experience).\nas already mentioned before, the battery is gone and you have to replace it.
260804
check first if u r using the right converter . if it is the right one and u used to use it until a problem exist then check ur laptop it has a burnd diode or transistor
91966
the battery is dead on your motherboard\nYou need to take the case cover off, and pull the flat battery out of the mother board and replace with the same type. \nREMEMBER To UNPLUG the computer first!!!!!\nLOL
15517
I have a Toshiba Satellite A70/75 that was doing the same thing that yours is doing.  I had to send it off for warranty repair.  It was shutting down as you described.  If I tried turning it back on too soon after it shut off it would not take long before it would shut off again.  If I waited a while then it would take a while before it would shut off.  It would just shut off out of the blue without a Windows is shutting down screen even showing up.  Just poof.  \n\nI read where other Satellite model laptops had the issue as well.  They had to replace the heatsink and clean it out.