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Struggling with POST issues

Last response: in Systems
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February 7, 2012 2:58:03 PM

Just FYI, I posted this earlier and it got closed for bumping. Very sorry about that!
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I've been reading over this forum for the last couple days and had no luck so I thought I'd start a new thread to see if anyone has any other ideas. So basically, I woke up a couple days ago and my computer was off. No problem, I assumed, it's sleeping. I powered it on and nothing happened. No lights, fans, beeps or anything. Crap, power supply is bad. I was running system (specs below) with a 450w supply that came with the Tigerdirect barebones kit I built a year ago. I figured it may not be enough at the time but everything worked for a year. Bought a new power supply and yeah, all the lights, usb power, fans, gfx fan all worked. BUT computer wouldn't get to bios screen and was silent. No beeps and no signal to graphics card.

After that I breadboarded my PC per instructions in this forum. Same situation. With no memory and nothing connected to mobo but 24 pin and 4 pin power and power switch (and CPU) I still get nothing other than basic power to the board. No beeps or any sign it's alive other than cpu fan and power supply fan/light.

BTW, I bought new graphics card (needed anyway so no biggie) which made no difference.

Here are my current specs:
Mobo NFORCE6M-A2
CPU AMD Phenom II x4 3 ghz
WD 1.5 TB Hard drive
Corsair GS600 power supply (was a 450w)
ATI Radeon 6750 Gfx card. (was 4650)
2-2 gb corsair memory at 1333 unbuffered

Thanks for any help you can give. Based on what I've read, I assume I'm down to motherboard or CPU. I've ordered a new mobo (MSI 970A-G45 AMD 970 Socket AM3+ which also supports my AM3 CPU). Does it seem like I made the right move ordering a new mobo? Man I hope I don't get down to it and find out I have to try a new CPU.

NOW -----------
I've replaced the mobo with the one I spec'd earlier. My CPU heats up now after 2 seconds which it didn't before. This tells me my old mobo was fried. However, I'm still in the same situation. No POSTing at all. No beeps (though I'm going to steal my son's buzzer just to make sure it wasn't my buzzer's fault).
Anyone have further suggestions.

More about : struggling post issues

February 7, 2012 4:19:23 PM

You should at least get a beep for not having any momory on the board. I have had a PSU fail and take out the MOBO. In my case I found the CPU to be fine. That's not to say your CPU might not have cooked too, but I would doubt it. Good luck.
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February 7, 2012 4:46:26 PM

I assumed that since the CPU was putting out sigificant heat, it was ok. Thanks for the response. Frustrating as heck. Tried another buzzer and same thing.
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February 7, 2012 4:47:27 PM

FYI, thee are lights on computer telling you what phase the CPU is in and they all light up.

Also, there is only one way to put in the 24 volt and 12 volt power correct? The locks should matchup..
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February 7, 2012 4:52:42 PM

Did you make sure that the motherboard case open switch(or whatever your mobo uses) is not triggered. Had the same problem before and it was a flip of the switch for me.
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February 7, 2012 5:00:06 PM

Good idea but case doesn't have one... checked it out. Thank you.
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February 7, 2012 5:01:03 PM

Does it matter which way the buzzer is plugged in. I'm wondering if I plugged it in incorrectly and fried it hence no POST information.
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February 7, 2012 5:39:24 PM

Kane65 said:
I've replaced the mobo with the one I spec'd earlier. My CPU heats up now after 2 seconds which it didn't before. This tells me my old mobo was fried. However, I'm still in the same situation. No POSTing at all. No beeps (though I'm going to steal my son's buzzer just to make sure it wasn't my buzzer's fault).
Anyone have further suggestions.


I know it's a silly question but I really have to ask. When you are breadboarding, you do have the CPU heatsink installed too right? How is it that you can detect your CPU "heating up" after 2 seconds? Are you just feeling the heatsink with your hand? I have to ask because I've seen people who actually burned themselves while running a naked CPU and "feeling" the heat.
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February 7, 2012 6:19:29 PM

I just left it on for two seconds without the heat sink to make sure it warmed up. It did not on the previous mobo but still does on this. i'm really puzzed by the lack of POST information (beeps).
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February 7, 2012 11:50:11 PM

Finally gave up and took it to a repair shop. Will let you know what they say.
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February 10, 2012 4:43:57 PM

Bad mobo.... new one from MSI too.
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!