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PC will not power up


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#1
NattyTerp

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Hi All - New member here, hoping you might be able to help me with my PC problem.

My PC will not power up after being unplugged. The LED light on the motherboard is blinking. I've checked the Power Supply using an Antec Power Supply Tester, that seems to be fine. I replaced the battery on the motherboard.

It's a home built PC, built Jan 2007.

-ASUS M2N-SLI Deluxe AM2 NVIDIA nForce 570 SLI MCP ATX AMD Motherboard

-Antec True Power Trio TP3-650 650W ATX12V SLI Certified CrossFire Ready Active PFC Power Supply with Three 12V

- BFG Tech BFGR88640GTSE GeForce 8800 GTS 640MB 320-bit GDDR3 PCI Express x16 HDCP Ready SLI Support HDCP Video Card

Any assistance/ideas would be greatly appreciated.

Thanks
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#2
Alzeimer

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Your bkinking led light is usually for these reasons: A blinking +5VSB LED indicates a problem with
the +5VSB supply rail. Possible reasons:

1) Motherboard is overloading +5VSB on the power supply. This could be
due to a large number of USB devices, especially "dumb" USB devices
with high power consumptions.
2) Power supply is malfunctioning and is not able to supply +5VSB,
to its normal current rating.
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#3
NattyTerp

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Your bkinking led light is usually for these reasons: A blinking +5VSB LED indicates a problem with
the +5VSB supply rail. Possible reasons:

1) Motherboard is overloading +5VSB on the power supply. This could be
due to a large number of USB devices, especially "dumb" USB devices
with high power consumptions.
2) Power supply is malfunctioning and is not able to supply +5VSB,
to its normal current rating.



Thanks for the reply Alzeimer - Is there a fix for this? Or should I try to replace the PSU?

Thanks
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#4
Alzeimer

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Unplug everything but the basic (video card, one ram, keyboard) and try these option:

Try replacing your PSU with a known good working one (borrow one if you can)

Try resetting your CMOS (bios settings) just replacing the battery will not reset your settings to their defaul value, you have to short the jumpers.
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#5
NattyTerp

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I'll give that a try this evening. Thanks again for the reply.
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