Question about AOpen MX46-533V (91.89U10.061) Motherboard

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Cannot boot the red power light is on, but the processor fan and the power supply fan aren't spinning the power supply was tested on a different board and it worked, but not on this board.

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Re: cannot boot

There must be a short between the board & case. All motherboard mounting screws should have red fiber washers. The bottom of the board should not be touching the case. The board should be mounted on stand-offs. These brass looking stand-offs screw into the back plate of the case & the board is screwed into these. If you feel the board is still touching the case. Cut a piece of paper and place it between the board & case. Memory not seated correctly or defective memory can also resulte in such problems. The red light on most Pc's is a hard drive light. If your PC have two dimms remove 1. Other cards not needed for this testing should be removed even sound cards. Connect only mouse & keyboard & monitor. It's all worth it if the pc works.

Posted on Jan 18, 2008

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Never boot when start up

That's because you have a Power Supply with a weak voltage power rail

How do I know this?

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 51 to 125 Watts of power. Just depends on what processor it is.

Your motherboard?

With the LGA 1155 processor socket, and the Intel H61 Express chipset, it can support Intel Core i5, and Core i7 processors.
(That use an LGA1155 processor socket)

Information on the Intel H61 Express chipset,

List of Intel Core i5 processors, that use the LGA1155 processor socket,

95 Watts maximum (TDP) Also scroll down.

List of Intel Core i7 processors, that use the LGA1155 processor socket,

95 Watts M-A-X-I-M-U-M. (TDP = Thermal Design Point) Also scroll down.

What is happening?
You press the Power On button. This plastic button in turn, presses against the Power On switch. A Momentary Contact Switch.

The brief closing of the Power On switch, closes the Soft Power On circuit, in the Power Supply.
The Power Supply turns on.

The first chipset to receive power is the BIOS chipset. The BIOS program starts.

BIOS looks to see what devices are connected, does a Ram Memory count, TURNS the Processor on, and hands the computer over to the Operating System.
(Windows XP, and Windows 7, are two examples of an O/S)

When BIOS goes to turn the Processor on, the Power Supply 'falls flat on it's face'.

Has to enough power to light a few little LED lights, and maybe spin a fan, or two, but NOT enough power for the Processor.

The monitor is stating No Signal, because there is no video signal coming from the computer. This is because the computer is not working, because of that bad Power Supply.

[Weak voltage power rail ]

Want to know how to test the Power Supply?
Post back in a Comment.


Jun 20, 2012 | Intel Desktop Board DH61WW Classic Series...

1 Answer

Have an Abit IC7 motherboard in a system given to me by a friend. I have two problems in getting the board to boot. 1) One of the brackets that the spring mount uses on the Northbridge chipset fell off...

1) The bracket is a simple push fit one - it just pops in and locks in there when pushed.
2) Simple test (assuming that the processor , video card and the memory have been tested in another motherboard and are good): remove all the disks and try to start it up into the BIOS - if you can't then the problem is in the motherboard. As a last hope reset the BIOS and remove the battery for one hour. If it doesn't starts even after that then the board is dead.
The DVD burner will power up and seek even if it's not connected to anything else - all that it says is that the unit is working normally.

Dec 16, 2010 | Abit IC7 Motherboard

1 Answer

RE ASUS P5S800-VM Motherboard.. system will not power up.. processor heatsink fan does not power up ... but ... removing processor and pressing power switch fan does work.. what is the problem??

Bad Power Supply. Weak voltage power rail.

[There are three main power rails in the SMPS for your desktop computer.
A) The 3.3 Volt power rail
B) The 5 Volt power rail
C) The 12 Volt power rail ]

1) ALL of the LED lights on at once use less than 1 Watt of power.

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

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

Remove the Processor, and you will have power to light LED lights, and spin fans.
Of course without a Processor operating, you have No computer.

Replace the Power Supply.

Do you have a KNOWN to be good, Compatible power supply available to use for a test unit?

Need guidance in replacing, or suggestions for Power Supply's to choose from, post In a Comment.


Dec 02, 2010 | ASUS P5S800-VM Motherboard

1 Answer

Hello I have a problem, my motherboard g31-m7 no video, i picked up the battery, but the problem still there, how to solve this problem?

I don't know who recommended a CMOS battery to fix your graphics, but this = no.

1) You have checked the monitor cable, correct? If the monitor cable is removable, replace it with a known to be good one, for a test.
If the monitor cable is not removable, use a known to be good monitor, and cable for a test.

2) If you are using the Integrated Graphics of the motherboard, (OnBoard graphics), then the next test is to install a graphics card. If you have graphics now, your OnBoard (Integrated) graphics chipset is bad.

3) I find most of the time, (Like around 80% or more) that the Power Supply is bad.
Enough power to light LED lights, spin fans, (Or spin a few times, and stop), but NOT enough power to turn the Processor on.

A bad Power Supply is one of the leading causes of computer failure, right next to computer is dirty inside.

A) ALL of the LED lights being on at once, will use less than 1 Watt of power.

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

C) A typical Processor can use 51 to 125 Watts of power. Depends on what Processor it is.

Here you can see a CPU Support list for the Biostar G31-M7-TE motherboard, and the wattage of the different CPU's,

Again, you may have a bad Power Supply.
Enough power to light LED lights, and spin fans, but not enough power to turn the Processor on.

No Processor operating, No computer.
No computer operating, No video signal.
(No Signal)

Do you have a KNOWN to be good, compatible power supply to use for a test unit?
Post back in a Comment.

Nov 06, 2010 | Biostar G31-M7 TE Motherboard

1 Answer

No display in monitor when i switch on my pc, i can see display on monitor after switching on the cpu for 5 or 6 times

Hello sir, hi, check out the following: I'm assuming the things that you may have forgotten.
1. is the 4 pin 12V Molex power connector connected to the mother board? 2. did you use a a good and tested memory module? have this module tested first on another PC. 3. Is your memory slot free of dust and dirt? if not clean it up. 4. is you power supply fan and processor fan spins when power is on? 5. Try powering ONLY the motherboard connected to a video display, no sata/ide cable with a tested memory installed. 6. try another Power Supply box. 7. Is your processor mounted properly? 8. when you apply power look at the keyboard lights, 3 lights initial power on then 1 light the numlock led is on. 9. do you have a plugged in usb device, remove this device as you power on the motherboard. 10. do every thing again and double check.
if all else failed, bad mother board. have this checked by a technician.

Oct 18, 2010 | Gigabyte GA-945GCMX-S2 Motherboard

1 Answer

Won't post, no beep. No display on monitor. Tried different AGP video card, different memory. I have unplugged everything but the AGP card and hard drive. The monitor works on a different computer so...

Basically, display card, RAM and processor are the ones affecting the display. IF trying different memory and video card doesnot help. Try changing the different processor. Thanx with regards Sajan

Jan 21, 2010 | Abit IC7-MAX3 Motherboard

2 Answers

I switch on the PC and there is no video/ boot up.

Yes and No.

Are you using the Integrated Graphics of the motherboard? (Onboard)
Tried using another DVI cable for your monitor?
If you are using an LCD monitor, of course.
If you're using a VGA monitor, have you tried a different, known to be good monitor?

If you're using an AGP graphics card, try going back to the Integrated Graphics, (Onboard), of your motherboard. Rule out whether it's that graphics card.

[I don't know what all solutions you've tried, so I have to go through a checklist in my mind, that I would use. Simple checks at this point, or not]

Something I would also like to state.
Power Supply

1.ALL the lights in your computer use less than 1 Watt.
(Unless you have a bunch of Cold Cathode Tube lights. They don't use much either)

2.EACH fan uses 2 to 3 Watts.

3.Those harddrives are spinning in an endless loop. Each one is using about 1 to 2 Watts. (Read on, and I'll explain why I think an endless loop)

4.A typical processor uses 51 Watts to 125 Watts. Depends on what processor it is.

(Your motherboard has a Socket 754 processor socket, and will support AMD Sempron, or AMD Athlon 64 processors.

Sempron's for the Socket 754 use 62 Watts, for a desktop computer.
Athlon 64's for the Socket 754, use anywhere from 51 to 89 Watts. Depends on which Athlon 64 it is, with an 800MHz FSB)

If you have a weak voltage rail in your power supply, you'll have enough power for light's, fans, and spinning harddrives doing nothing.
You WON'T have enough power for the processor.

No processor, no finding the boot sector on your main harddrive. Harddrive is just sitting there spinning in an endless loop.

No processor, no signal to the monitor, no graphics.

Do you have another known, good, power supply to test? Maybe buy a cheap one to test the system, then replace it with a quality one?

(Cheap. About $20 to $30. Make sure it has enough Wattage, the right power cables, and enough Amps on the 12 volt rail.

About $50 for an OCZ StealthXStream 600W.
Can put out 728.8 Watts if you keep it at, or below, 118 degrees Fahrenheit. (47.9 degrees Celcuis)
Has Four 12 volt rails capable of putting out 18 Amps EACH. Total is 72 Amps!

Why do I think power supply may be the problem? 70% of the computers that come to my shop for repair, have this problem.
Electrolytic Capacitors have gone bad in the PSU. (Power Supply Unit)

Motherboard issue?
Most of the time it's Electrolytic Capacitors that are the problem here, also.
The one's surrounding the processor are Voltage Regulators for the processor.
Just one will cause the processor to not operate.

The ones on either side of an expansion slot,
are Filters. If one fails it's no big deal. If more than one fails, you start having problems quick!
(Such as the graphics expansion slot for a video card. Yours is an AGP expansion slot used for a graphics card)

Here's information on Electrolytic Capacitors used on typical motherboards, and info showing, and telling about capacitor visual signs of failure,

Aug 22, 2009 | MSI K8MM-V Motherboard

1 Answer

Mother board no display

Looks like the lights are on? Fans spin? Sounds like the harddrives spinning? The power supply is bad. has just enough power to light lights, and spin fans, but not enough for the processor. (No beep sounds, because BIOS hasn't done a memory count. It's not going to)

ALL the lights use less than 1 Watt.
EACH fan uses 2 to 3 Watts.
The harddrive just sitting there spinning, uses about 5 watts.

Processors use 55 Watts to 125 Watts. Depends on the processor.
Not enough power to turn the processor on, the computer won't work. Computer isn't working there isn't anything to turn the monitor on. No Signal.

Apr 17, 2009 | Intel Motherboard

1 Answer

Intel Desktop Board D945GNTLKR did not boot

Try choosing the 'Exit Without Saving' option in the BIOS menu. If this kicks you to the boot media search, then 99.99% the BIOS is corupt. If not, try to replace the CPU cooler (don't forget to apply the thermal grease).

Mar 15, 2009 | Intel Motherboards

1 Answer

One long beep.

  1. Leave the memory slot closest to the processor empty and try booting again. Award bios 1 long beep is memory error as the first 64K of the ram stick closest to th processor is accessed first. since you have tried different ram in different locations, let's rule out the board.
  2. If that doesn't solve anything try a different power supply. Sometimes (Phoenix) gives a long beep when system board or power supply are bad.
  3. Now if nothing else has worked it is probably tour mother board.

May 16, 2008 | Abit KN8 Ultra Motherboard

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