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New Mobo boots, no POST or Bios beeps.

Last response: in Systems
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March 23, 2013 8:41:00 AM

Hey guys, long time lurker, first time poster.

So i got this new mobo because i was under suspicion that my old one was fried. (Kept getting gfx bsod's)
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Mobo: Intel DG41CN Micro ATX
CPU: Intel Core 2 Duo
PSU: ACBELL 240 W
Also have tried a CorsairTX 650M
RAM: 2x1 DDR2 SD Ram

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Now, the problem is whenever I boot up the PC itself, I have breadboarded the system and tried to isolate the problem. On a few occasions the PC would boot up fine and the fans would just keep spinning but there would be no POST or Bios beep.
At other times the PC would boot for a quick second then power off (Normally with the ACBELL PSU) which i think would be a lack of power.
I have also tried resetting the CMOS by removing the battery and taking out the jumper, still no luck.

And I have plugged in the CPU power cable as well as the 24-pin Mobo cable
and the 6-pin PCI-e cable when needed.

Ive tried pretty much everything and I have come to the point where i need someone else's help to fix this problem.
a b ) Power supply
a b à CPUs
a b V Motherboard
March 23, 2013 9:18:20 AM

It sounds like 1) a power issue or 2) motherboard gone bad. What is the graphics card that is being used? The ACBELL 240w certainly doesn't have enough power for a system with a discrete graphics card. You mentioned that you've tried a Corsair 650w PSU? What happens when you use the Corsair PSU with only the integrated graphics (with no video card installed)? Have you updated the BIOS? (Only do it when the system is stable).
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March 23, 2013 9:57:16 AM

larkspur said:
It sounds like 1) a power issue or 2) motherboard gone bad. What is the graphics card that is being used? The ACBELL 240w certainly doesn't have enough power for a system with a discrete graphics card. You mentioned that you've tried a Corsair 650w PSU? What happens when you use the Corsair PSU with only the integrated graphics (with no video card installed)? Have you updated the BIOS? (Only do it when the system is stable).

Been using on board, just cleaned and re applied paste to the cpu/heat sink

I have tied the corsair and the system boots. Just boots, no bios beep or POSTING.

I can really update the bios if the system doesnt boot.

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a b ) Power supply
a b à CPUs
a b V Motherboard
March 23, 2013 10:04:59 AM

NateGetty said:
I have tied the corsair and the system boots. Just boots, no bios beep or POSTING.

It "boots"? Not sure what you mean by that, but when a system "boots" it loads its OS. If it boots the OS, then I assure you that it is POSTing, it's just doing so silently. Look at your mobo manual and figure out what keyboard key will get you into BIOS (its usually the 'delete' key), then continue to press that key after restarting until you get into BIOS.

If by "it boots" you mean something other than it loads the OS, please elaborate.
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March 23, 2013 10:13:41 AM

larkspur said:
NateGetty said:
I have tied the corsair and the system boots. Just boots, no bios beep or POSTING.

It "boots"? Not sure what you mean by that, but when a system "boots" it loads its OS. If it boots the OS, then I assure you that it is POSTing, it's just doing so silently. Look at your mobo manual and figure out what keyboard key will get you into BIOS (its usually the 'delete' key), then continue to press that key after restarting until you get into BIOS.

If by "it boots" you mean something other than it loads the OS, please elaborate.


Sorry, what i mean is that when i power on the PC, both the CPU and the PSU fans spin, but they don't slow down, they keep spinning at a constant pace (Fast and Loud). I'm normally used to them slowing down when the motherboard beeps.

Still no video or posting.
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a b ) Power supply
a b à CPUs
a b V Motherboard
March 23, 2013 10:29:33 AM

Ok, its sounding less and less good. Have you tried only using one stick of RAM at a time (see your motherboard's manual for the proper slot to put only one stick)?
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a b ) Power supply
a b à CPUs
a b V Motherboard
March 23, 2013 10:32:17 AM

NateGetty said:
So i got this new mobo because i was under suspicion that my old one was fried. (Kept getting gfx bsod's)

Also - elaborate on the problems with the original board. What graphics were you using? Integrated? Discrete? With which PSU? Same CPU? Same RAM?
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March 23, 2013 10:41:28 AM

larkspur said:
NateGetty said:
So i got this new mobo because i was under suspicion that my old one was fried. (Kept getting gfx bsod's)

Also - elaborate on the problems with the original board. What graphics were you using? Integrated? Discrete? With which PSU? Same CPU? Same RAM?


I have tried one stick of RAM, and its in the right slot.

When using the ACBELL PSU the PC will power on for a breif second and then turn off, then it wont power on until the PSU has been unplugged and the CMOS has been reset.

When using the Corsair 650w the PC will power up and the fans will continue to spin at the same pace without any POST or any bios beeps.
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a b ) Power supply
a b à CPUs
a b V Motherboard
March 23, 2013 10:47:50 AM

Well the ACBELL sounds like its a problem. Was this your original PSU? It may have been your problem all along and maybe it took your new mobo and other components along with it when it croaked.

Using only the Corsair PSU, after clearing the CMOS, try your other stick of ram by itself in the proper slot (we're trying to make sure that one of your sticks of ram isn't to blame). Otherwise the different behaviors of the different PSUs is strange and is indicative of a PSU problem. Like I said, that ACBELL may well be dead and a dead PSU can possibly kill other components.
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March 23, 2013 11:16:39 AM

larkspur said:
Well the ACBELL sounds like its a problem. Was this your original PSU? It may have been your problem all along and maybe it took your new mobo and other components along with it when it croaked.

Using only the Corsair PSU, after clearing the CMOS, try your other stick of ram by itself in the proper slot (we're trying to make sure that one of your sticks of ram isn't to blame). Otherwise the different behaviors of the different PSUs is strange and is indicative of a PSU problem. Like I said, that ACBELL may well be dead and a dead PSU can possibly kill other components.


I tried every different SDRAM stick in each slot, the PC turned on with every stick in every slot, it also powered oh without any ram in it. which i though was a little odd.

The ACBELL was my original PSU but im using the Corsair PSU on the new build.
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a b ) Power supply
a b à CPUs
a b V Motherboard
March 23, 2013 11:54:43 AM

Hmmm. Well it doesn't appear to be a simple solution. Going forward:
1) Don't use the ACBELL PSU, it's behaving differently than the new Corsair, I don't like it's behavior, it's probably dead and if so it's likely the original cause of your problems.
2) If you haven't already, get a PC speaker and plug it into the appropriate pins on your motherboard (see the manual). Then power-up the system with CPU and RAM installed (with the Corsair!) and listen for the beeps. On most motherboards you won't hear the beeps unless you have a PC speaker plugged-in. Note the pattern of the beeps and report them back. If you have already plugged-in a PC speaker and/or it doesn't make any beeps at all, then your mobo is probably dead (maybe other components too). Either the replacement was DOA or that ACBELL was dead and it fried it. When cheaper PSUs croak, they can fry components.
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