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POST and then no POST :\

post #1 of 8
Thread Starter 
I'm not even sure what is going on in this problem, so I'll just explain what I did.

I got my RMA'd motherboard back (the note said nothing was wrong) and I installed my e8400, 2 memory modules, and an hd4550 and hooked up the hdd. I turned it on, it POST'ed, and everything seemed to work fine. I could navigate the bios and even boot into windows.

Then I took out the hd4550 and installed my hd4850. I turned it on and it did not POST. I moved the jumper to clear RTC and moved the jumper back into the normal position. Still no luck. I took the battery out and waited a moment. Still no luck. I put the hd4550 back in and the computer does not POST. I try the clear RTC and battery trick and it still does not POST. I flipped the PSU switch on and off and tried again. The computer briefly turned on, turned off, and turned on but did not POST.

I know all of the hardware connected to the motherboard is functional because it all works in a different motherboard. Thanks in advance for any help, OCN.

Edit: I didn't turn off the PSU while clearing the RTC/CMOS. I'll try doing that right.
Edit2: It doesn't help. The computer just turns on, resets itself, and then doesn't POST.
Edited by Nickosha - 12/21/10 at 12:34pm
post #2 of 8
Thread Starter 
Any input would be appreciated. This is supposed to be a present for my family :\\
post #3 of 8
Silly question but are you sure you have the power for the cards plugged in? and the right connectors?

Have you checked the power supply to make sure it is good?
Edited by jasonhardin - 12/21/10 at 3:07pm
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post #4 of 8
I would also run memtest just to be safe.
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post #5 of 8
Thread Starter 
There was power for the cards all of the times and I'm pretty positive everything was plugged in right. I guess I'll try to run memtest at some point. This is all pretty disappointing and discouraging, though. I've figured it was a faulty motherboard, but Asus sent it back twice saying it was fine and this time it worked briefly, but not consistently.
post #6 of 8
try booting it up with 1 stick of ram at a time

and as other answers, make sure all cables are plugged in, i have often made this mistake my self

also pardon my ignorance, but is your ram too fast for the mobo, as my mobo will only support 667 or 800mhz ram
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post #7 of 8
Quote:
Originally Posted by jasonhardin View Post
I would also run memtest just to be safe.
How can you run a memtest when he cant even post ? lmao
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post #8 of 8
I have had a few post, no post issues.

1) Do you see a post code in our motherboard or a post beep?
2) When you say no post, do you mean no power whatsoever to the motherboard?

Let me recount similar issue I had in the past - maybe that will give you an idea.
1) On one of my SLI board, if I have my video card in the farthest PCIe slot, my comp will turn on - it will post - but no display. I get a post code 7F. Found out I had a bios setting to use only the card in the first slot as primary display.
2) On my current build, I had power to board (all LEDs lighting up, all fans whirling), but no display. The board does not have any provision of getting a post code. Thought I was SOL. But good members in this board pointed out to me that I had my RAM stuck in the wrong freaking slots. Changed that and I was back in business.
3) I had turn on, turn off, turn on turn off, adnauseum in this build because I installed the power button jumper incorrectly. Basically, I flipped the ground and the hot side.
4) I had similary issue as #3 because I overclocked my RAM beyond what it could handle. Almost crapped my pants as I was unable to get to BIOS - but after about 3 turn on, turn offs, it let me get to BIOS to back the overclock out.
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