What makes a computer not turn on? Need answer ASAP?
86098
I was a repairman for a while.  This is the order to check.  First check the power cord. at the back of the computer and at the wall or power strip. Then check to make sure you have power at the outlet.(Plug a lamp or fan or radio that you know works into it). Then check the power strip the same way.  There is now a switch on the back of most computers so check to make sure it is on. If these don't bring it back to life (in the order of most likly) it is probably the power supply, Fuse on the main board(doesn't look like a fuse),or Blown CPU.  On a rare ocassion it is the video card. Normally if it is the power supply you can tell by the smell from the back of the machine but not always.
1100580
If you cannot get your computer to work then how are you here asking this question?
952909
try to restore your BIOS setting to it's default, remove your Computer Case cover, Then remove the Battery On the Mainboard, plug In the cable, then put the battery back, Turn on your computer.
923871
It could be a ton of things.  Try these first:\n\nPop the battery out and plug in directly to the wall.  If it powers on, you have battery problems.  If not, jiggle the power cord in the back of the computer and keep pressing the power button.  If no luck, try doing the same while jiggling the cord to the wall or to the power brick.  You either have a bad motherboard or a bad power adapter.  Try another adapter if you can.  Is it on warranty? \n\nI just sent my laptop out yesterday with exactly the same problem...and it's either a fried motherboard or bad power adapter.
339028
something is fried in your laptop, most likely the internal power module. the clear signs are, the lcd and the hard disk get no power.\ntherefore you have no other choice than getting your laptop to repair.
276219
Why not check the simplest thing first. Go to Control Panel and select Power Management. Check the entry Standbymodus - is there a time defined? If yes, set it to none or never.
757367
You didn't give enough details.  How far into the bootup can you get?  Is it a power problem?  Is the light on the front of your PC on?  Is there an error message on the screen?  Does anything show up on the screen?  What happened right before the problem started?  Was some new hardware of software installed or removed?  Do you have virus protection?  Do you have your Windows recovery disks or the original Windows CD?  Post the question again and include as many details as possible.  Computer problems are too complex so anything you can add will help.
337406
Try going into the Control Panel, and selecting Power Management.  There might be an option in there to change what the computer does when the "lid" is closed.
756312
I think you computer went into stand-by mode. To disable standby, Go to Start>Control Panel>Power Options.\n\nUnder Power Options properties, set power schemes to 'Always On'. You shouldn't have anymore problem after doing this.
181706
Try plugging in your keyboard first and then turning your computer on. Where I work they have a very out of date computer and it did the same thing. We turned the power off and plugged in the keyboard. When we turned the computer on it worked.
267582
I will give you some basic steps to get it working again.\n\n1- Look over the machine amd replug all devies like monitor, key board and mouse, ECT. There may be a loose power card or cable. Also check to see if there are any bent or damaged pins in the connectors of the devices. \n\n1b Check to see if the computer is set up for 115 volts in the back of the unit where the power supply is. There is a little  red volt switch around the area as to where you plug the machine cord in. If it is set to 220 then set it to 115.(assuming your are in the USA)\n\n2 IF your computer is not in warranty then open the case up, Follow your manual to do this correctly.\n(Before removing any thing make sure you touch a metal part of the case first to discarge any static electricy)\n\n2a Use some canned air to clean out the components first and then try to start the computer.\n\n2b.You will have to un seat all devices one by one and then reseat them. For example take out the sound/video by un screwing them from thier fastens and carefully take them out and then put them back in. \n\nDo the same for hdd cables and power cables. These cable must go back excactly as they were put in.\n\nLocate your ram on the main board and reseat this as well.This may be the most important step because a computer will act as though it is compltly dead if the ram is not properly seated. Ram (or memory is easy to find) It has two small white or blue plastic finger clips that fasten them in. Also ram has one or two notches(Depending on type) that make almost inpossible to put them back in wrong.\n\nAfter reseating everything try starting the comuter.\n\n3 if the computer still does not start then youl will may have to replace the power supply.\n\n4 Contact support for additional information.
75014
Remove the battery and try just ac. I've had some laptops stop working because the battery had no charge. If that doesn't work, get it serviced.
870921
You may have a stuck key, check your keyboard or a card half unplugged or your cmos battery is dieing.....or just about dead...if the computer does not run or load programs, then it could be screen or Memory is wrong or not plugged all the way in...
778893
just leave it on.\n\nthat's my answer.  but you do have to edit your power preferences so your computer doesn't turn off after 2 hours of non use.  other than that, I don't know.
787805
Try turning on the monitor, see if it is plugged in right.  If none of that works don't hit it with a sludge hammer, bring it into a computer store.
210351
PSU failure, where the volatge exceeds ~8.5v. Check the keyboard connector to make sure it's clean.\n\nHave an experienced person look at it (don't pay to have it serviced until a friend says so, that's just stupid)\n\nUsually the fuse connected between the power and the keyboard connector would blow out before the keyboard would.
675471
From just the information you provided, it sounds like your battery ran down.  Plug into an outlet and see if you can turn on.  If so, charge your battery overnight and your problem will be resolved.  If you can't turn on while plugged into an outlet, you will need service to your laptop.