My computer will not power up but the LED on the MB's lite up.
I just build a computer two weeks ago and I try to add another HD but after add that HD and removed. Now my computer does not power up, even the power switch is dead, but the LED of the MB still lite up. Please help
Re: My computer will not power up but the LED on the MB's...
I think that case is m/b crash. so u do first remove all power connector in your m/b and in later 3 minutes u can put all power connector in your board. All connected in ur board so u run your system firstly hear " te ", That is clear for your problem. But
u don't hear press key in checking ur screen in m/b BIOS setup key. i cann't tell exactly because BIOS setup is many different but any configure u can do that for example: LOAD SYSTEM FIALD or System Performance...
Ok i wish u do that and slove your problem...
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Not sure of your particular MB, but most always the switch is a pair of pins in an array where the front panel LEDs and reset and power switch are. This array of pins is almost always at the lower right hand side of MB. Assume the components side is facing you and the expansion slots are at your left hand, (where you add extra cards like video etc). then look at the lower right side or bottom edge, mostly right at the edge of the board. Should be an a double row of pins, at least 8 maybe up to 12. Look real close next to these and you may see print indicating which pair do what. PS = power switch. RS = reset, HD = Hard drive LED PLED = power led light.Spk internal beep speaker etc. (Note LEDs require correct polarity to work) Sometimes no print there.. Then you need the manual to decipher pin pairs. Or experiment. All you need to do is make the connection momentarily (like push button) with a small screw driver tip to start it, while looking for correct pins. If no power on check your power supply connections on the MB. Or suspect either MB or Power supply issue.
Looking at this post, I think your Motherboard is bad. Have you tried a different Video Card? My other thought is the CPU is overheating due to incorrect seating of the FAN and heat sink. Try cleaning the CPU off, and put new paste on the CPU, then re-seat the heat sink. Be careful to make sure the anchors are pushed all the way down by slightly twisting or wiggling the heat sink. Check for looseness. Push down on all memory sticks to ensure they are seated all the way in. They should click on both sides. If it still gives you a red light, then contact the website of the manufacturer, and get an RMA number for a replacement.
It seems to me that your motherboard may be on it's way out. Those seem like some of the signs when the MB is in it's death throes. Or make sure your system isn't dusty or in a moist area. Could be your power supply isn't high enough. I'm going with motherboard though.
The first thing you should do is remove the video card and try to boot
the PC using the onboard video (video on the Motherboard) and see if
that solves the problem. If it does, try putting the video card back
in in a DIFFERENT PCI slot and try it again. Sometimes Windows loses
its marbles about
cards inserted into PCI slots. My nieces eMachine loses its marbles
over the Wireless LAN card about once a year, so I just move it to a
different slot (swap it with the phone modem card). If that makes it
flaky again, try updating the video card drivers. If it doesn't help,
your video card is shot.
If it isn't the video card, try taking out one memory chip at a time and booting with the
first one in. If that doesn't do it, swap the memory chip with the
other one and try booting it again. If needed, replace bad chips....
After that, it is probably the power supply or the MB itself. Swap out
the power supply first. If it is not the power supply, then it is
probably the MB, and you are SOL.
Try powering the system on with only the AC adapter, see if you get any power indications.
If you do not, then the system is not getting AC power.
See if the power adapter has an LED on it and if it is lit with the computer disconnected. If the LED doesn't come on at all, replace the adapter. IF the LED is on with the computer unplugged from it, then goes out when you plug it in, then try a new AC adapter.
If a new AC adapter doesn't resolve the problem, then you may want to look into buying a new computer as replacing the motherboard on this system may cost more than replacing the computer with a new system.