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  #1 (permalink)  
Old 09-23-2008, 05:08 PM
Junior Member
Join Date: Sep 2008
Posts: 1
Default PC won't boot up but LED light comes on

Hi everybody,

I just started having this problem today and I'm not quite sure what's going on. When I try to start my pc, only the front LED light comes on accompanied with a high pitch sound. There is no other action (no fan, no whirring, nada). Looking at other boards, many people said it may be a power supply issue. But changing the power supply did not fix the problem. Also, I found that when I just plug in the power cord, the high pitch sound begins to emit immediately. This is an older computer, 6 years old, and was not custom built. Any ideas?
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  #2 (permalink)  
Old 09-24-2008, 02:02 AM
Senior Member
Join Date: Mar 2008
Posts: 1,110

You know that BEEEP you get when you start up? That's from the POST, the Power On Self Test. It happens very early in the bootup cycle. While the computer is testing the motherboard, before it gets to the peripherals.

No beep = FUBAR motherboard. Mama ain't happy, nobodies happy. Last time that happened to me, it was the result of a lightning strike.
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Old 10-21-2008, 10:11 AM
Junior Member
Join Date: Oct 2008
Posts: 12

Could be fan on CPU is not working and the motherboard is not powering up to protect the CPU. If this is the case hopefully CPU is not cooked.
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Old 11-10-2008, 11:59 AM
Junior Member
Join Date: Nov 2008
Posts: 2

I Think That Your Mother Board Get Shorted And Conductor Thing Is Touches Ur Mother board. You have Take Ur mother Board To The Professional.............
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Old 12-29-2008, 12:40 PM
Junior Member
Join Date: Dec 2008
Posts: 4

Your motherboard is get shorted. you Have to take him to the expert........
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  #6 (permalink)  
Old 01-01-2009, 10:34 PM
Junior Member
Join Date: Dec 2008
Posts: 15

Is the high pitched sound a beep from the PC speaker (motherboard speaker)?

Is there a certain code to the beeps? One short beep like Mark said is a successful POST. Other combinations of short and long beeps may tell you the problem. Depending on your BIOS manufacturer, the beeps will be different for different problems. You can look them up at places like:

PC Hell: BIOS Error Beep Codes
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