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  Need help troubleshooting Asus P5ND2-SLI mobo (cannot get into BIOS at all) 
 
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Casual ComputerDood Aug 09, 2008, 07:17pm EDT Reply - Quote - Report Abuse
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Hello,

I've recently changed from a Asus P4C800 Deluxe mobo to an Asus P5ND2-SLI. I've also changed my 380w psu to a 700w psu.

What happens:
I power the PC on
--> I hear the BEEP
--> the keyboard lights flash
--> the mobo splash appears with a prompt for [DEL] to enter setup
--> SITUATION 1: I hit [DEL] and nothing happens until the screen changes to black and the monitor gives me a "NO SIGNAL" notice (as if the keyboard was dropped)
--> SITUATION 2: I already hit [DEL] before the post and it appears with the message "Entering Setup.." until the screen changes to black and the monitor gives me a "NO SIGNAL" notice
--> the PC continues churning ad infinitum (and sometimes auto-shuts off).

* I don't get any error messages or boot crashes (at least nothing that is indicated).

What I have done:
- reset my mobo
- checked all the possible jumper settings
- tried replacing the memory (4 different sticks)
- re-inserted the CPU

I have:
OCZ GXS700 psu
p4 3.8 Ghz CPU
3 Gigs (4 sticks) of 533 ram
nVidia GTX8800 graphics card

These items were sent USPS from a friend (last time he checked before boxing them away, due to new PC, everything worked fine).

I've subsequently reinstalled my old mobo with the new psu, rebooted, and everything works fine.

If anyone can help at least in reducing the possible sources of this issue (perhaps it's the mobo, doubtful it's the psu since it seems to work with old hardware but it may just not be giving out enough juice) it would greatly appreciated.

Cheers!


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Gerritt Aug 09, 2008, 10:59pm EDT Reply - Quote - Report Abuse
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>> Re: Need help troubleshooting Asus P5ND2-SLI mobo (cannot get into BIOS at all)
Have you attempted to hard reset the BIOS?
Shut off rear power rocker switch, remove the powercord, press the front power switch and hold for 5 seconds. Remove onboard battery. Move battery jumper from 1-2 to 2-3, wait at least 15 seconds, move jumper back, replace battery, replace powercord.

You stated that you reseated the CPU. Did you clean and reapply new thermal grease? The reason I ask this, is it sounds almost like a thermal shutdown, but not exactly like one.

I believe that the GTX8800 has two 6-pin power connectors. Have you connected both?

Flakey DRAM Timings could also be at fault. Try running with just 2 sticks to start.

Good luck, and welcome to HWA.

Gerritt

Ad Astra Per Aspera
(A rough road leads to the Stars)
We all know what we know, and everyone else knows we are wrong.
System Specifications in BIO
Casual ComputerDood Aug 10, 2008, 02:42am EDT Reply - Quote - Report Abuse
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>> Re: Need help troubleshooting Asus P5ND2-SLI mobo (cannot get into BIOS at all)
Gerritt said:
Have you attempted to hard reset the BIOS?
Shut off rear power rocker switch, remove the powercord, press the front power switch and hold for 5 seconds. Remove onboard battery. Move battery jumper from 1-2 to 2-3, wait at least 15 seconds, move jumper back, replace battery, replace powercord.

You stated that you reseated the CPU. Did you clean and reapply new thermal grease? The reason I ask this, is it sounds almost like a thermal shutdown, but not exactly like one.

I believe that the GTX8800 has two 6-pin power connectors. Have you connected both?

Flakey DRAM Timings could also be at fault. Try running with just 2 sticks to start.

Good luck, and welcome to HWA.

Gerritt



Hello,

Thanks for the welcome.

Yep, I did a hard reset of the mobo and i didn't reapply any thermal grease (although it did look rather fresh still but I really don't know if that means anything or not).

I connected both 4 pin CPU connectors and both 6 pin connecters for the GTX.

I also tried all my ram separately, just one stick at a time but none of it bore any positive changes.

Any other possible suggestions?

Cheers!

Gerritt Aug 11, 2008, 05:17pm EDT Reply - Quote - Report Abuse
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>> Re: Need help troubleshooting Asus P5ND2-SLI mobo (cannot get into BIOS at all)
The only other thing I can think of is the GPU itself.
You mentioned that sometimes the computer grinded on even with no video out.
Now I have a 8800GTX GPU that will refuse sometimes to return to service upon a hard reset, and I'd have to do the rocker off, then front switch press for 5 seconds (to provide for capacitive discharge) then return power to get a display out of it. But I only ran into this when I switched to a dual monitor set-up, and it was only the one card (a 1st generation 8800). This isn't a major inconvienience to me because the system is on 24/7.

Have you tried a different GPU in this system, or this GPU in a different system?
The only other thing I can think of is a overloaded 12v rail, but your PSU should be able to support the documented devices easily.



Ad Astra Per Aspera
(A rough road leads to the Stars)
We all know what we know, and everyone else knows we are wrong.
System Specifications in BIO
Arthur Roberts Apr 20, 2013, 10:34am EDT Reply - Quote - Report Abuse
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>> Re: Need help troubleshooting Asus P5ND2-SLI mobo (cannot get into BIOS at all)
I know this is a very old post, but was there ever a resolution? I'm having a motherboard that is doing the exact same thing. I bought it used... maybe it was yours? ;)


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