Member Avatar for famousas

I have asus's new sli board and an enermax 600w sli power suply. 1 stick of 512 ddr and a nvida 7800 gtx video card and amd's 64 3000. Ihave checked all the connections more times than i can count, they all seam to be in place. The problem i am having is the system wont boot up for the first time. the green power light on the board is flashing green and when i push the power button nothing happens, no fans turn on, no sounds of any kind. I have asked asus to help but they are taking there sweet time getting back to me. Please help, i have spent alot of money for this paper weight.


Thank you in advance

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Additional targeted diagnostics for an A8N board that shows the green standby LED but gives no response (no fans, no POST). These steps expand on the earlier suggestions from and are focused on power-delivery and shorts — common causes when a system is completely silent.

  • Verify the CPU auxiliary power: confirm the 4-pin P4/12V CPU power connector is present and fully latched. A board can show standby but refuse to start if that feed is missing.
  • Isolate the PSU: swap in a known-good supply or use a purpose-built PSU tester. If comfortable with the method, perform a PSU self-start test (short PS_ON/green to any black ground on the main ATX connector) only after all motherboard and drive connectors are unplugged and safety precautions are observed. If the PSU will not run on its own, replace it.
  • Bypass the case switch: momentarily short the two front-panel PWR header pins with an insulated screwdriver or jumper to rule out a faulty switch/cable.
  • Eliminate shorts and mounting issues: remove the motherboard from the case and bench-test it on a non-conductive surface (cardboard). Look for extra standoffs, stray screws, or metal filings under the PCB.
  • GPU and power-hungry cards: try powering the board with the 7800 GTX removed. If the system powers up without the card, the GPU or its PCIe power lead may be tripping the PSU or creating a fault.
  • Visual inspection: check for bulging/leaking capacitors, burn marks, or visibly damaged components — these are strong indicators of board failure.

If the PSU proves good but the board still shows no activity when the power pins are shorted, the motherboard’s power circuitry is probably defective and RMA or professional diagnostics are recommended. Take standard mains-safety precautions when performing any live tests.

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Member Avatar for Catweazle

Check the sticky at top of page.

Are you sure you've tested it 'barebones'? No USB headers etc etc attached? Checked front panel leads for reversed position? No internal cards or drives attached? (Even the power lead connected to a drive can cause a problem - disconnecting the data cable isn't enough. Reset CMOS?

The 7800GTX is a very recently released card. Perhaps the motherboard has 'issues' with it and might need a BIOS update before it will work with that card?

Member Avatar for unrealized

I am having a similar problem: I have the asus a8n-sli motherboard and all of the sudden, my computer crashes, so i proceed to restart it and there is just a black screen, NOTHING happens. What do I do? I have already tried all of this:

Check the sticky at top of page.

Are you sure you've tested it 'barebones'? No USB headers etc etc attached? Checked front panel leads for reversed position? No internal cards or drives attached? (Even the power lead connected to a drive can cause a problem - disconnecting the data cable isn't enough. Reset CMOS?

should I just send it in for repair?

HELP PLZ!!!

here are my sys specs:
ASUS A8N-SLI motherboard
AMD Athlon 64 4000+
2gb DDR400 RAM
Nvidia 6800 256mb PCI-Express
Memorex DL DVD Burner
600w Power Supply

Member Avatar for Catweazle

If you have both worked through the step by step instructions in this pinned topic:

http://www.daniweb.com/techtalkforums/thread27079.html

and still cannot get a 'bare bones' configutation to POST then yes, perhaps it is time to get a technically qualified person to look at it for you.

Member Avatar for unrealized

could it be a graphics card problem?

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