Question about Biostar K8M800-M7A Motherboard

2 Answers

Power supply and CPU fan problem

I am installing a new motherboard and when I plug in the power cord the power supply and CPU fan come on without me pressing the "On" button....help? What have I done wrong?

Posted by pigeonrun47 on

  • Anonymous Nov 01, 2007

    I have same problem.

  • Anonymous Nov 08, 2007

    I have a same problem.

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2 Answers

Anonymous

I did anyting. But, problem is same.

Posted on Dec 25, 2007

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rajesh raman

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You dint mention the mother board u are using in some motherboards jumber setting can power up the system check the jumber setting in the mother board near ur front pannel pins in ur motherboard

Posted on Nov 30, 2007

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1 Answer

Hi i have an r630 desktop and it did work but now i have no power to motherboard no fans cpu but i do have power to the hard drives and rom replaced power supply same problem


Maybe your motherboard is toast.

When you plug in the power cord is there any lightswhatsoever on the laptop, where the plug goes in or on the AC Adapter of thepower cord?

When you press the power button do you hear fans running, hard drive spinning,lights on the computer, hear any beeps or lights constantly blinking, hear theDvD/CD drive click and the light on the drawer of the DvD/CD turn on for asecond or two? If so the laptop is trying to boot or may have booted, butthe screen is not showing for some reason.

Beep tones and blinking lights tells the technicians what is going on with thelaptop and why it is not booting. Most times it's a motherboard issuewhen you hear beeps or blinking lights continuous.

Maybe your power cord is bad if you don't get anything to happen whatsoeverwhen you press the power button. And if that's true maybe you wasoperating off the battery the last time you had it on and since the power cordis bad, it was not charging the battery so the battery is drained and the powercord is bad.

Maybe you have a Static Charge Buildup. Remove the Power Cord, Remove theBattery, then Press and Hold the power button for 30seconds. After 30 seconds plug the power cord back in (leave the batteryout) and hit the power button to see if it boots. If it does, you can putthe battery back in and let it charge.

Mar 30, 2012 | Computers & Internet

2 Answers

When i plugged power cable to my pc cpu fan start without press power button


It should start for a few seconds, the fans should spin and then stop. You should be able to power it up as per normal. If that is no the case then you are having hardware issues which could be the Power supply

Apr 03, 2011 | Intel 845GE Motherboard

1 Answer

My custom built computer has a the m7vig400 installed and i can't formatt my new harddrive because the fan on top of my processor will not come on why ? it came on with a 16 head hard drive how do i...


First, make sure you plug the power from the fan back into the motherboard & try it again. Did you do anything else besides just pulling out your old hard drive & putting the new one in? The CPU fan is completely independent of the CPU fan. You can start up you system without ANY hard drives & the CPU fan will come on if it's plugged in & the power supply is working etc. If you make sure the fan is plugged in correctly & the fan still doesn't come on, I suggest you temporarily put your old hard drive back in & firing things up. I'm sure you will find that the fan still doesn't work.

All that said, if the CPU fan isn't working (& everything else is), then it's a bad fan or motherboard. It's not necessarily a bad motherboard. Sometimes there are jumpers that control that sort of thing. I'm not sure exactly what that motherboard does. I have had this exact motherboard for years & as long as the fan is plugged in (& the power supply is working), when you start things up, the fan comes on.

One last thought, try flipping the power supply switch in the back to reset the power supply before you press the button in the front. Good luck...

Jan 07, 2011 | Biostar M7VIG-400 (M7VIG 400-COMBO4)...

1 Answer

Computer won't boot up. Could hear a grinding noise on the top left side (opposite side of the HDD). Took the bottom cover off and reconnected the battery and power. The fan (assume it's the processor fan)...


Hi,

You can try the following steps:

1. Unplug the power from the laptop and remove the battery then press the power button of the laptop for 15 seconds

2. Put the battery back in, turn on the laptop without plugging the power to the laptop (If this didn't resolve the issue)

3. Remove the battery and press the power button of the laptop for 15 seconds, after that, plug the power cord and turn on the laptop (if this didn't resolve the issue)

4. Remove the power cord and press the power button of the laptop for 15 seconds, disconnect the Hard drive and turn on the laptop (If this didn't resolve the issue) reconnec the hard drive

5. Remove the Optical Drive and turn on the laptop (If this didn't resolve the issue) reconnect the optical drive

6. Remove the memory chip, if you have 2 memory chips installed in the 2 memory slots (remove both of them) now test each one of the memory to each slots turning on the laptop. (If this didn't resolve the issue) Put the memory chip back in

7. Reseat the CPU and try to make sure that it's installed properly. Turn on the laptop and test if it's gonna work (If this didn't resolve the issue)

8. Reseat the power cords coming from the power supply of the laptop and test the laptop. (If this didn't resolve the issue)

9. Disconnect everything and just leave the CPU installed and turn on the laptop.

10. If all else fails, there's a big possibility that the problem may be with the power supply or the motherboard of the laptop.

(Note: you may try to clean your computer if there is a large amount of dust. You may try to remove the CMOS battery)

regards,

sl4x

Feb 13, 2010 | Computers & Internet

1 Answer

Motherboard flashes when power cord plugged in


I had the same issue with the same mb. The cpu has gone bad. rare, I know, but it happens.

Dec 15, 2009 | ASUS A8V-VM SE (MB-A8VVMSE) Motherboard

1 Answer

Fans run without turning on front switches


Hi Gene,

If you've installed the cpu and hooked the fan to the power supply plug, which is just left of the cpu mount, then the board if connected to the power supply cables, it should start up. Regardless of the front switches. However, you probably don't want to start plugging in the power cord until you have all of your components in place and ready to close up the case. First you can create a shock by just touching the board and that can damage the board. (I speak from my own experience :-( .

But once you get the power switch plugged into the board that should take over turning the rear power supply on and off (Including the cpu fan)

Good Luck and don't forget to leave a rating, based on my solution.

Thanks Mark

Apr 16, 2009 | Intel D865PERL Motherboard

1 Answer

Power supply Ok.But CPU fans started with seconds It's stop.


sounds to me like your mainboard is bad, i bet if you closely inspect the capacitors around the cpu one or more is bulged out or leaking

Feb 15, 2009 | Asrock P4S61 Motherboard

4 Answers

Dell optiplex won't Boot-up.. Orange light on motherboard


its going to rather your power supply or your motherboard has died, id try a different power supply first

Aug 04, 2008 | Dell OptiPlex GX520 PC Desktop

2 Answers

Asrock P4i65G Motherboard


If the CPU is dead the problems can be
  1. no power
  2. no fans etc or
  3. power, no beeps (errors)
If the Ram is not compatible it would be constant beeping.

With the board in, and power supply 20pin + 4pin Pent 4 power attached,(#2 and #7 of motherboard layout) remove power cord from power supply.
CLRCMOS0 allows you to clear the data in CMOS. The data in CMOS includes
system setup information such as system password, date, time, and system
setup parameters. To clear and reset the system parameters to default setup,
please turn off the computer and unplug the power cord from the power
supply. After waiting for 15 seconds, use a jumper cap to short 2 pins on
CLRCMOS0 for 5 seconds. Remove the jumper. Remove heatsink and fan from CPU. disconnect cpu and reseat it. Re-install heatsink and fan. Plug in the power cord. Try to boot up. If it still does not boot and (no power, no fans etc.) problem would then be cpu is fried.



Jun 02, 2008 | Computers & Internet

1 Answer

Compaq Presario 4400us


Either the new power supply you purchased is not functioning correctly. But, assuming it is now that you are getting some form of power to your PC, it is very likely the motherboard. Whatever fried your old power supply (or it could have just been the power supply itself) most likely fried your motherboard in the process. Probably not the CPU since the MB can't even post.

Jun 21, 2007 | Compaq (388746-001)...

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