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I think mobo died

Last response: in Motherboards
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August 25, 2009 10:43:29 AM

i took out everythin from case tried to run with minimum.Still nothin tested everything in a different computer and it ran fine.The computers mobo would blink with a blue led if stayed on or it would shutdown.It would say ff then go to f on the left of the debug and f on the right of the debug with single f's.As i said i tried it all in another computer and it ran fine.And tried a different power supply on the new board still nothin.did cmos and all that so my problem is probly the mobo.also tried different video card in the new board nothing.And both power supplies work on old mobo not on new.Also switched memory up many times.I get no video is whats the problem tried hooking up speaker didnt hear no beeps.

More about : mobo died

a b V Motherboard
August 25, 2009 12:24:40 PM

We need to know your system specs to comment. Mobo, RAM, PSU, graphics card, HDD, etc.
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August 25, 2009 12:33:09 PM

Im sure you dont really need to know my system specs,but maybe the board but i will post them.I have crap p4 ht 3.8 ghz,900 watt apevia warlock,4gb ocz fatality ram,and 9800gtx's was running sli.Why would a harddrive matter has nothing to do with no video no posting an such.I said all the parts work in other computers,and they all worked very well in the messed up mobo till now.
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a b V Motherboard
August 26, 2009 4:57:59 AM

I'm a little confused, did you upgrade/change the motherboard? You make reference to old and new motherboard. Either way could you state what motherboard(s) you have?

I have seen badly crashed HDD's (actually the controller on the HDD) cause computers not to POST until they are unplugged (both data cable and power). So don't discount this troubleshooting step. Booting requires a HDD, POSTing doesn't.

When dealing with POST'ing issues my advice is to have the bare minimum to POST: 1 stick of RAM, 1 video card (or on-board if it has it), CPU & HSF (obviously), PSU. No HDD, no optical drives nothing else.

If this is a new motherboard, I have seen some boards (one particular incident with Giga-Byte) where if high performance RAM needing above JEDEC standard voltage was used, the motherboard underpowered the RAM and system wouldn't POST. Often times the RAM was overlooked in these instances because it worked in another system.

With some more information, we may be able to help.

Please spell out clearly what troubleshooting steps you've already taken so we can better help you.
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a b V Motherboard
August 26, 2009 8:03:18 AM

bird187 said:
Im sure you dont really need to know my system specs.


We also don't need to know about your problem.
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a b V Motherboard
August 26, 2009 8:32:48 AM

It took a while to figure out, but if you have really done all that you say your problem is likely either mobo, cpu, inadequate memory settings, or a BIOS that doesn't support your cpu.

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a c 156 V Motherboard
August 26, 2009 1:27:23 PM

techgeek is right: start from the basics. He just didn't go all the way back to the basics.

Disconnect everything from the motherboard except the CPU and HSF, the two power cables going to the motherboard, and case power switch. Boot. You should hear a series of long single beeps indicating missing memory. Silence here indicates, in probable order, a bad PSU, motherboard, or CPU - or a bad installation where something is shorting and shutting down the PSU.

To eliminate the possiblility of a bad installation where something is shorting and shutting down the PSU, you will need to pull the motherboard out of the case and reassemble the components on an insulated surface. This is called "breadboarding" - from the 1920's homebrew radio days. I always breadboard a new or recycled build. It lets me test components before I go through the trouble of installing them in a case.

It will look something like this:
http://www.tomshardware.co.uk/forum/page-262730_13_0.ht...
You can turn on the PC by shorting the two pins that the case power switch goes on.

If you get the long beeps, add a stick of RAM. Boot. The beep pattern should change to one long and two or three short beeps. Silence indicates that the RAM is shorting out the PSU (very rare). Long single beeps indicates that the BIOS does not recognize the presence of the RAM.

If you get the one long and two or three short beeps, test the rest of the RAM. If good, install the video card and any needed power cables and plug in the monitor. If the video card is good, the system should successfully POST (one short beep, usually) and you will see the boot screen and messages.

Note - an inadequate PSU will cause a failure here or any step later.
Note - you do not need drives or a keyboard to successfully POST (generally a single short beep).

If you successfully POST, start plugging in the rest of the components, one at a time.

And Apevia PSU's are, well, excessively mediocre.
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August 27, 2009 4:10:45 AM

no beeps motherboard blinks blue led but power doesnt blink.not ram not cpu and tried power supply in another computer.My processor's supported im on older 750i bios was going to get e8400 not now.Everything else works for any with any other product just not this motherboard.
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a b V Motherboard
August 27, 2009 4:46:33 AM

bird187 said:
Everything else works for any with any other product just not this motherboard.


Then you clearly don't need any help. You have convinced yourself its the mobo. Replace it.
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a b V Motherboard
August 27, 2009 4:54:36 AM

bird187 said:
no beeps motherboard blinks blue led but power doesnt blink.not ram not cpu and tried power supply in another computer.My processor's supported im on older 750i bios was going to get e8400 not now.Everything else works for any with any other product just not this motherboard.


You did as jsc said. The part about shorting the soft-on jumpers is an important one. It would indeed be ironic if you got a new motherboard and put it in the existing case and found it was you power switch was the problem.
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