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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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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)...

2 Answers

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

Getting 4 beeps with memory out, drives disconnected, empty PCI slots. Swapped power supplies and got the same error condition. System was working and quit unexpectedly. Even unplugged the fans and got the...


you posted a mobo number not a PC real name.
its HP 412410-003 HP 442031-001 S775 A/V M/B
that is XW4400 ( I own a mint xw4600 ) simular.
why post MOBO #'s and not true PC name?????????

no MOBO works ever with all memory out , why do that?
just to hear the 4 beeps the manual on the PC
its a HPE workstation in fact not a PC.
the PSU is dead. (or a gross short)
why not test the PSU First with the jumper clip
im reading your manual for you now XW4400
it says. BAD PSU.

Blinks red 4 times (once per
second), then a 2-second
pause, and then 4 beeps


the fans slow means 12vdc is weak as in not at 12vdc.
only 2 things cause that.
bad PSU, or the 12vdc bus is shortred.

more sure
5 beeps is memory dead, low bank.
6 is video bad. GPU card.

the beep code 4 is top priory error
think about that, if power is bad, all else IS
in electronics power is first. and always first.
means at spec.


the test is easy and 3 fold is savvy
1: the jumper test.
http://www.pcdied.com/power.html#rapid_testing
2: same as above, but turns on and voltage test all pins.
3: if really pro- a load bank test, puts full load on PSU.

that is why shops with tools waste little time.

strip all things off the MOBO
memory
all drives
all PCI cards and express cards. (all but CPU) CPU dont fail
if the heatsink has not fallen off.
remove all things that can short out 12vdc, fans and drives.
do not run it with fans pulled for more than say 15 seconds
use a voltmeter, turn it on
measure 5v and 12v and 3.3v psu pins. seen in link above
a dmm meter is $20 at warfart. anyone can use one, easy.
the black wires are ground (common) meter black to black.
red meter to the 3 top power pins on PSU jack.


now my wild guess, bad PSU. but I cant strip your PC nor watch you.

732d9676-7fbe-42a9-9725-ef871ff6a0b2.jpg

Jan 12, 2018 | HEWLETT-PACKARD HP 412410-003 HP...

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.  

Mar 12, 2009 | Okia 420w UL Approved ATX Computer Power...

3 Answers

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...

2 Answers

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.

Aug 05, 2008 | ASUS M2N-E SLI (M2N-E SLI GREEN)...

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