Question about ASUS M2N-MX Motherboard

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PC doesn't turn on

I have amd 5600 suddenly it's stop working. when i press power btn processor fan run for 1 or 2 seconds only but after 1 or 2 days if i try to start it will start for once and when i shutdown the pc it gives same problem. again it will start after 2 days for 1 time until i shutdown. i check smps, ram, HDD all is working. plz help me.

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  • Anonymous Oct 07, 2008

    I have the same problem. I checked the memory, video card, and powersupply with a Intel gigabyte board and everything worked fine. Its either the AMD 6400+ CPU is bad or the ASUS motherboard. Since I don't have an extra AMD CPU its going to be tough to figure out which one is faulty. I just built my computer 6 months ago and I never had any of the computers I build that went bad within 2 years. The Asus motherboard I have has a built in safety off feature if the board gets too hot. The quickest way for you to find out is to purchase a new CPU and pop it in to see if this corrects the problem. If this doesn't, it has to be the motherboard. Well I'm going ahead and purchase a new CPU and motherboard because I did wanted to upgrade my computer. FYI........its very rare that a CPU goes bad before the motherboard unless you didnt have a proper heat sink to keep the CPU from overheating.

  • daredevil103 Nov 13, 2008

    my asus m2n-mx could not start up no visual or sound ,powersupply turn on and off for a sec but board remain lighted. have change power supply with same result

  • Jason May 11, 2010

    were you grounded to the case when installing hardware? It is possible there was an ESD and part of the system has been damaged. It is also possible that the POST or BIOS is not passing a test, remove all components except your cpu is you get a steady beep its ok, then install the memory and go from there


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I guess your problems are solved, but for anyone else reading this thread, here is the fix that worked for me.... *when i pressed the power button, all fans would spin up for less than a second, and die, nothing else happened* so i tried many things and this is the only solution i found; Isolate the power supply from the case, or try just holding the power supply when running the computer. I found that if i held my power supply in my hand, and made sure there was no cnotact between it and the case, my computer worked! Hurrah. So now have cable tied my psu to the top of my case, insulated by a layer of foam. And it's working fine.

Posted on Jun 09, 2009

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You can find a lot more help- info about that in the forum of asus....!

Posted on Nov 18, 2008

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New build doesn't beep

A) Power Supply checks out?
You have tested the three main voltage power rails?
3.3 Volts
5 Volts
12 Volts?

What were the voltages?

Post back in a Comment.

1) If ALL 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 (CPU) uses 51 to 125 Watts of power.
Just depends on what Processor it is.

AMD Sempron 100 series? 45 Watts
AMD Athlon II? Could be up to 95 Watts
AMD Phenom II? Could be up to 125 Watts.

Don't assume because you see LED's light up, and fans spin; that your Power Supply is good.

A Power Supply with a weak voltage power rail, will not have enough power to turn the Processor on.

B) The motherboard mounts to a Support Plate.
The Support Plate can be a separate metal plate, or an integral part of the computer case's metal frame.

Mounting of the motherboard to Support Plate, is accomplished with either plastic Spacers; or metal Standoff's.

If using metal Standoff's, make SURE all Standoff's are matched to a motherboard mounting hole.

IF, a Standoff is NOT matched to a motherboard mounting hole, there is a good chance it can touch the exposed solder joints; on the bottom of the motherboard.

Result? Short Circuit of motherboard.
MOST, of the time the 'offending' Standoff can be removed; or relocated, and the motherboard is OK.

C) All power cables from the Power Supply to motherboard, plugged in, and plugged in tightly?

New motherboard, and the connectors will be TIGHT, usually; when plugging things into it.

D) Disconnect everything except Processor, processor fan power, and Ram Memory.

Means unplug Harddrive power cable, and data cable.
Optical drive power cable and data cable
Card Reader cables, IF used.
USB Front Panel cables.
Computer case fans.

BARE minimum.
Turn the power supply on. (Press the Power on button)
You are at this point, just trying to see if you can get the BIOS Setup screen to come up.

(Press - enter BIOS Setup key)

BIOS Setup screen comes up, go on.
BIOS Setup screen does not come up, there is a problem with the motherboard.

BIOS Setup screen comes up, don't tarry around.
Turn the computer off.
(Press the Power On button in for a count of 10 seconds, or until computer turns off)

Computer case fans not plugged in, you don't want to overheat the motherboard chipset. (Especially the Northbridge chip)

Then add harddrive, and hook up computer case fans.
Everything looks good so far, then plug Card Reader in.
Then plug Front Panel USB cables in.
(The front of your computer is the Front Panel)

Had a person the other day find out it was his USB cables/USb ports; that were the problem.

E) By the way............
There are Solid Capacitors surrounding the Processor, and as you can see; other areas on the motherboard also.

However there are Electrolytic Capacitors on the motherboard too.

See them by the Northbridge chip, (Aluminum Heatsink is on it), and around the expansion slots? (PCI and PCI Express x1, and x16)
Around bottom of motherboard also?

The ones around the expansion slots I'm not that concerned about, as much as the ones around the Northbridge chip.

My belief is that the ones around the expansion slots, are used as Filters.

However the ones around the Northbridge chip, (And solids around the Processor), are used for Voltage Regulators.


Know what really bites?

Electrolytic Capacitors have Electrolytic Paste inside.
This is a chemical, and works with a chemical reaction.
It breaks down over time, also.

Can also just dry up inside, and show no outward visual signs of capacitor failure.

Plus, can I state this tactfully?
ECS motherboards are not known to be the 'cream of the crop', if you know what I mean.

For additional questions please post in a Comment.


Mar 19, 2013 | ECS A780LM-M2 Socket AM3/ AMD 760G/ A&V&L/...

1 Answer

My asus m2n32-sli motherboard won't start up; runs for 4 seconds then shuts off. currently hooked up to the mobo: have a 500W power supply; AMD 3300 64 processor; zalman cpu fan; 2 patriot 2GB DDR2...

Sounds like you built this puppy.

1) Does it use metal standoff's to hold the motherboard up off the Support Plate? (Standoff is metal, Spacer is plastic)

Do the standoff's match EVERY mounting hole in the motherboard?

To wit, there isn't a standoff sitting on the support plate, that doesn't match up to a mounting hole in the motherboard?
If there is a standoff in the wrong spot, it could be shorting against the exposed solder joints on the bottom of the motherboard.

2) is the 4-pin +12 volt power cable from the Power Supply plugged into the motherboard?

[ Two Yellow 12 Volt wires, two Black Ground wires ]

3) Thermal paste applied, and properly? AMD processors don't play when it comes to heat. If they reach the thermal limit, (Like any Processor), they turn off, BUT, an AMD will turn off in a heartbeat.

Heatsink sitting flat on the top of the Processor's case? I use a 'birds-eye' view with the mobo out, and look across the side. (Sides, ends)

4) Zalman fan doing it's thing? Spinning?
Spinning all the time, no intermediate spinning of spinning a few times, and stop?
Spinning at the proper RPM?

5) Patriot ram seated well? Locks are in tight?

Didn't get bumped when you were hooking up power cables?
Remove/re-seat. Only takes a few minutes, and will help you sleep better tonight.
(Both of those ram memory modules in the same channel?)

6) Power Supply known to be good?

What is with the 40GB Seagate harddrive? Typo, and meant 400GB?

Nov 04, 2010 | ASUS Premium Vista M2N32-SLI (M2N32-SLI...

1 Answer

I have asus m2n 68 se2 motherboard and amd processor.when i press the power button ,the cpu fan just run then off. .cmos cleared

Before anything you should suspect the power supply. It may be able to start the board for a second, but doesn't have the oomph to keep it running.

Aug 09, 2010 | ASUS M2N68-AM SE2 Motherboard

1 Answer

Blank monitor upon turning on PC

Well.... The motherboard could be dead... or check the power supply unit. Check the memory chips, see if the capacitors around the processor looks blown up (then motherboard is kaput) or make sure the monitor is properly connected to the motherboard monitor port... It could be numerous reasons ... See if the processor cooler fan is running and check if the processor's cooling paste is OK which would cause the processor to run TOO HOT and would prevent the PC to start-up etc etc....

Jul 20, 2009 | AMD M863G (M863G15CV22ARV000) Motherboard

1 Answer

No Display

hi....good day...>try to replace the ATX power supply...< thanks and good luck...^_^

May 29, 2009 | ASUS M2A-VM (0610839149438) Motherboard

2 Answers

Computer will not boot up.

I have built several gamming computers, one with Asus and had good luck. What I do have is a power supply checker that I got from Tiger Direct that I use alot. To me a 450 watt PS sounds a little small . Sounds like it cant regulate the voltage, expecially the 5 volts. I have a master power supply (650 watts) that will hook up to any board or hard drive. I try it when I have this kind of problem. The only thing I dont like about Asus is that they have so many pins, so I would double check the pin settings.
Did the power supply come with the case.. If it did, change it. I have never had any luck with those. I really think they use 2nd hand ones for kits. Just my opinion GOOD LUCK

Nov 03, 2008 | ASUS M2N-E SLI (M2N-E SLI GREEN)...

1 Answer

New motherboard and cpu: no post

I have encountered that kind of problem before in the AMD processor. When your turn on the switch the fan is spins and then suddenly stop. The processor is shorted or there is defective parts you need to return it to the supplier. But can you check first if the motherboard and the processor is match . Maybe the motherboard cannot carry the speed of the processor it's better to ask to the supplier or ask them to test both the processor and motherboard .

Apr 17, 2008 | MSI 945GCM5 Motherboard

2 Answers

Suddenly quit and won't start.

Could be a processor failure, but try changing the cmos battery first on the mobo and locate 'JBAT1' terminal on mobo and put jumper across pins 2-3 then back to pins 1-2 and try starting up again.

Jan 09, 2007 | EliteGroup P4VMM2 Motherboard

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