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ASUS M3N78 PBO MB w/AMD 9550 & XFX GT9800 grafics. System worked for about 8 hours. Now when I power up system power led blinks at about a 1hz rate and no beeper heard and no light on display. Have tried bypassing xfx by using video out on MB -- no change. Fans work and can feel disk drives humming.


Answers :

Please clear the CMOS by jumpering it out or removing the cmos battery for a minute.
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Try a different power supply thats good enough - what wattage rating is your power supply and if you only put the ram, cpu, heat sink and fan with onboard graphics card ( ensuring the onboard graphics card is obviously enabled in the bios ) does it work ?

I would try and reset the bios either through jumpers or taking the cmos battery out for a few hours or more and then re seating the cmos battery.

That should hopefully reset it. Also if you have had it less then a year it should be under warranty in which case if it is still not working then a replacement ( RMA ) or refund to get another motherboard.

Also check to see if the graphics card you got is compatable with the motherboard.

You could try if you can get it to boot up enough a bios update on the motherboard but not sure if that would invalidate your warranty so worth while checking to see if it would void your warranty first before trying that.

If it does then get a replacement motherboard and make sure that the power supply you have can handle it ie does it have enough wattage to run everything you have in your system.

You can google for power wattage ratings and you just tell it what you have in your system, type of processors etc and it should come back and tell you what wattage power supply you should get - also make sure the make of power supply you get is a decent brand name not a cheap one or one thats un heard of.

http://www.anandtech.com/casecoolingpsus/showdoc.aspx?i=3186


http://www.tomshardware.co.uk/forum/page-250569_10_0.html

check out reviews before purchasing a power supply and if you require further assistance let me know
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ASUS M3N78 PBO MB w/AMD 9550 & XFX GT9800 grafics. System worked for about 8 hours. Now when I power up system power led blinks at about a 1hz rate and no beeper heard and no light on display. Have tried bypassing xfx by using video out on MB -- no change. Fans work and can feel disk drives humming.


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