[Help] PC wont boot up

phinam51

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Joined
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Hi all, I need advice on troubleshooting my pc that wont be able to boot up.
Symptoms: After power up, there is a loud siren-type noise from the mobo, cant get into bios, after 3-4s, power goes off and start again.
I try to remove everything from the mobo ( remove rams, gpu, hdd,...) but it still the same. Anyone has counter this before? Do I need to replace my mobo?

Specs:
Gigabyte GA-H77M-D3H (warranty just finished in Sep)
Chipset i5-3330
GPU: sapphire HD7850
Ram: Crucial 8gbx2
SSD: Samsung evo 840 120gb
HDD: WD 2TB
 
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