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Computer turns on for 3 secs then shuts off

Last response: in Motherboards
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April 7, 2010 7:50:24 AM

I have a new board biostar ta785g3 hd and i have everything connected but whenever i turn on the computer led d2 led1 ph3 d2 ph1 d1 light up first 4 then 3 then 2 and the board shuts down. Everything is brand new i just bought it.
my specs are:
My PSU is raidmax atx 630W
4gb 2 dimm Adata 1600g ram
biostar ta785g3 hd mobo
AMD Athlon II X4 620 Propus 2.6GHz 4 x 512KB L2 Cache Socket AM3 95W Quad-Core Processor
Western Digital Caviar Green 1TB
LG 10X Blu-ray Burner

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a c 295 V Motherboard
April 7, 2010 2:57:17 PM

Hi newcomer and welcome to the Tom's hardware forum.

1- Do you check the manual of your mobo to know what means that LED sequence?
2- Read this, maybe can help you to solve your problem.
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