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Same problem as others cited. Fans race and no bootup

Reading through posts seems like both MOBO and Power supply need to be changed. Does that mean processor is OK? Because I did see a message on bootup that processor needs to be cycled down. Will appreciate any help.

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  • Jackie Roberts May 11, 2010

    If you wasn't doing anything hardware wise, this could be a failing power supply. There may not be anything wrong with your motherboard. A failing power supply does all kinds of strange things to your hardware. If your hardware has been doing strange things lately it's probably the power supply. What were you doing before the problem started?

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Please remove C-mos battery from *********** board & reinsert it,Before it power down the system. After that in c-mos setup selsect Default load & restart the System.

Posted on Jun 29, 2009

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Posted on Jan 02, 2017

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When I power on the desktop the power button LED turns to steady amber and the fans race constantly at high speed. The system does not seem to complete POST or boot into the O/S. I changed the CMOS Battery...


Can you check at the back of the computer to see what the diagnostic lights are indicating 4 led's (eg yygg - yellow yellow green green) - post the result and i may be able to provide a soltuion

Sep 24, 2013 | Intel K83v0 Dell Motherboard Inspiron 560...

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Asrock N7AD-SLI Motherboard LED


The fans and indicators working for a sec would normally mean that your power supply is Ok. This flash of current must trigger a switch in the mobo to start the boot process. This is not happening. The RAM is a principal player here if it does not connect the memory to the processor nothing will happen. Assuming the RAM is correct and has worked faultlessly before, remove and clean the teeth with an eraser. This prob can also be caused by the VGA card not connecting. Usually alarms sound if your mobo speaker is connected but that depends on each mobo. These are basic steps that usually start machines that have been inactive for a time or have recently been exposed to high humidity. There could be other faults...............

Aug 28, 2012 | Asrock N7AD-SLI (4711140872940)...

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Mainboard: g31 m7 te - power: antec hcg750 - gpu: gtx560ti


No the mobo is compatible with the Power Supply, and GPU.
And vice-versa.

Mainboard fan???????
You mean the Processor (CPU) fan?

I'm guessing I guess, because computer case fans aren't on the motherboard/mainboard/mobo.
(MOtherBOard)

You're getting power to the mobo, but the question is how much?

1) IF ALL of the LED lights were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use from 51 to 125 Watts of power.
Just depends on what Processor it is.

http://206.108.48.60/app/en/mb/introduction.php?S_ID=363&tab=1

The mobo will support Intel Core2 Quad-Core processors. Depending on which one, you may be talking about Up To 105 Watts of power,

http://en.wikipedia.org/wiki/List_of_Intel_Core_2_microprocessors#Quad-Core_Desktop_processors

This is why LED's can light, and fans may spin, but the Processor isn't getting enough power, so the computer will not turn on. (Processor isn't turning on)

Why?

1) Just because that Power Supply is new, doesn't mean it is good.
Sometimes you get a bad one. Test the three main voltages coming out, with a multimeter set to DC Voltage.

Need guidance post back in a Comment.
(An economical multimeter can be purchased, for as little as $8 to $12. I have seen cheaper. Available in a multitude of stores. An auto parts store is but one example )

2) You don't have the 4-pin ATX +12 Volt power cable plugged in.
Goes to the white square 4-socket hole connector, to the left top corner of the Processor socket.
(Motherboard installed in computer case)

3) REQUIRES -> TWO 6-pin PCI-Express power cables, for the Nvidia GTX560Ti graphics card.

The Antec HCG750 PSU has 4 of them, so no problem there, IF you have two of them plugged into the graphics card.

Both connectors of the 20 + 4-pin ATX main power cable's connector, need to be used. Biostar mobo requires a 24-pin ATX main power cable.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817371049

Post back in a Comment as to power cables plugged in, and DC Voltage test on PSU.

Regards,
joecoolvette

Aug 06, 2012 | Biostar G31-M7 TE Motherboard

1 Answer

Power button does not light, fans run but computer does not send signal to monitor. Replaced power supply, no change. Put in new graphics card, still does not generate video that would allow me to change...


no HP PC stated just a MOBO. must we guess?
no the power button is just 2 wires, a digital line and ground
it must be plugged in to the correct MOBO jack.
in fact i can turn it on with a simple jumper wire, there.
i guess you found the board, in garage sale, just tossed in a box?
if the local vga jack and added in VGA card both fail then its a mobo issue.

im googling for you.
lets see what POPS
Compaq Brio ATX PGA370 New D7580-60003 *
This motherboard is only compatible with Celeron 400 CPUs
With integrated SiS Super AGP graphics controller?
takes 1 good RAM stick.
if the fan fails to stay on, that means the PSU sees errors.
mostly sees shorts on MOBO(remove things to find it)
that one old mobo is rare, now.
is the coin cell at 3vdc, or below 2.9v, if yes, needs new one.
HP has zero data (information) on this old mobo or the COMPAQ BRIO anything.



https://www.youtube.com/watch?v=3at_Ev2kOoI

Aug 13, 2017 | HP (D7580-60003) Motherboard

1 Answer

Bootup


a bad power supply or a hairline crack in the mobo

Jun 04, 2009 | ASUS (P4BGV-MX) Motherboard

1 Answer

Dell Inspiron 530 I turns on and nothing happens


1.) If when hitting the power button, ABSOLUTELY nothing happens, no fans come on, nothing- You need a new power supply most likely. I see this all the time in my shop. Here's the bad news- Dell likes to use their own special power supplies, so a normal one may not even fit in the case. If that is the case, then I'm sorry to say Dell likes to charge over $100 easily for a new one.

2.) Fans come on, lights come on, but no screen. This can mean any number of things. Bad VGA cable (or DVI), bad RAM, bad mobo, even a bad PCI card. time to start troubleshooting. Change what parts you can, remove any PCI cards that are not needed, remove one RAM card then the other, etc....

Apr 29, 2009 | Dell Inspiron 530 Desktop Computer

1 Answer

Friends custom-build PC has no power


Seems reasonable. Take the motherboard out of the case,  first to see if it will work outside of the case. Sometimes boards short to the ground due to a screw or other metal getting between them and the case. Try to run it with as little hardware hooked up as possible. You don't even need a hard drive to post the BIOS.  

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T2893 desktop did not power on when I hit the power button


If you can find someone that has the same model, that is the best way to make sure it fits. Some other motherboards will fit, but you may have to do some work to get them to fit. The best way would be to try to do some research on your particular motherboard (mobo) on the internet. Sometimes it will have a manufacture’s name and model on it, try googling it and see what type it says it is (ATX, mini-ATX, AT, etc). One problem you may have is the power button connectors may not be compatible with your new motherboard if you get something besides an emachine mobo. If you are good at electronics it will not be much of a problem for you.

Unless you get an exact e-machines mobo, your OS will most likely not work at startup. Windows XP does not like wholesale changes like a mobo. When it sees that a major configuration change has happened it sometimes freaks out. Sometimes it will just ask you to re-activate windows other times it gets stuck in a reboot loop. Hard rive and CD rom should still work, provide you do not get too new of a mobo. Older HDD and CD drives were IDE connectors, newer ones have SATA connectors. Unless your mobo and power supply unit (PSU) have the correct connectors you will not be able to use them.

To the poster who asked if it could be anything else besides bad mobo. Yes it can occasionally be a bad power supply unit (PSU). A bad PSU does not necessarily mean no power, just not enough power to run the computer. You can try swapping it out with another one of equal or greater output watts. You can try removing the power connectors from the drives and then remove the memory and see if it changes the boot up procedure of your machine. More beeps, different beeps, no beeps, etc. Add one component back at a time to test. Make sure you get the same results and not just a one-time fluke start up. If a memory stick is bad, it usually is bad. A power supply or mobo can be flaky and fail some times and not others.

Jan 25, 2009 | E-Machines eMachines T3830 PC Desktop

1 Answer

Tyan S5396 and Thermaltake 1500W


tyan i5400xt.. to test for ground.. pull the board from the chassis and test with a different known good power supply

if the boot works... then you have a power supply issue...

does the board have a post code lighted signal ???

if so.. a bad power supply should goto FF error code

verify you have enough power on the cpu rail with your power supply specifications also

be sure you have all cables 4 pin 8 pin and 20/24 pin connections done correctly.. lastestly check if the board is touching the chassis edge anywhere... could cause a ground

also take and loosen all the MB screws from the chassis.. just let it hang there this will test the grounds needs the screw connections

mark@omces.com

tyan specialist

Oct 31, 2008 | Tyan S5396A2NRF Dual LGA771 XEON5000 5100...

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NO video @ bootup


Are you sure that the memory you have installed is compatible with your motherboard.

It is weired but some memory do not work with certain motherboards, irespective of speed or voltage rating.

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