Question about Intel Motherboard

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Motherboard doesn't work n show in monitor.But fan processor,fun cassing and power supply on light.

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Hi im josh in cebu phils.may i help you friend? if your motherboard wont work on means that one of your hardware is not working such hardware is the video card because it is the responsible of giving out put on screen. check if it is seated properly on the slot. 2nd is the mainboard it self be sure the connections are not lossen like the screws on board and the chord of the monitor to the pc. if is still occurs you need to change you motherboard because that is the problem. good luck hope i helped you

Posted on Feb 27, 2009


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Monitor shows no signal when put on. i've checked the graphic card and it seems to have no problem. RAM and CMOS battery are all fine but data refuses to show on monitor. Please i'll need...

A) Power Supply:
Power Supply has a weak voltage power rail.


But the LED's light, and fans spin?

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 (CPU) can use 51 to 125 Watts of power.
Just depends on what Processor it is.

This is why the simpy little LED's can light, and fans spin; but Not enough power to turn the Processor on.

There are 3 voltage power rails;
A) 3.3 Volt
B) 5 Volt
C) 12 Volt
ALL are DC Voltage.

[In comparison two D cell flashlight batteries produce 3 Volts DC ]

Do you have access to a multimeter to test them with?
Around here an economical multimeter is $5 to $12.
Available at auto parts stores, (A wee more expensive)
I have also seen them on checkout aisle racks, at major discount stores.

I can guide you step by step.

Do you have a KNOWN to be good, Compatible power supply; that you can use for a temporary test unit?

B) Electrolytic Capacitors:
Specifically - Radial Aluminum Electrolytic Capacitors.

Some motherboards use nothing but those.
Newer motherboards went to using those, plus Solid Polymer Capacitors.
Finally, most new motherboards that are gamer style, use nothing BUT Solid Polymer Capacitors.
(Or whatever the new solid capacitor used is)

C) Next,.........
The front of your computer is the Front Panel.
Disconnect all cables going to the Front Panel, for the USB ports, Firewire ports (1394/1394a), and Card Reader cables.

DO NOT disconnect the cable/wires from the Front Panel header, on the motherboard.

[The area of contact pins on the motherboard, that the Main wires go to, is the Front Panel header.

The main wires are the Power On switch, Power On LED light, HarDDrive activity LED light, and Reset switch, IF used ]

Still no?

Disconnect the Harddrive cable from the motherboard, (Data cable), and the power cable to Harddrive.
Do the same for the optical drive. (CD/DVD drive)

ONLY things to be connected is the;
1) Processor
2) Heatsink
3) Processor Fan
4) Ram Memory

Graphics card, IF it is the only graphics solution.
Otherwise, plug the monitor into the Integrated Graphics of the motherboard.

[Back of computer in the I/O area. The I/O area has a rectangular sheet metal, I/O Shield around it.

Input/Output area.
Input: Mouse, Keyboard, etc.
Output: Monitor, Printer, etc ]

NO cables from motherboard connected to Anything, except Processor Fan, and Front Panel header.

Does the BIOS Setup screen show, when you press the enter BIOS Setup key?

Post back in a Comment.


Feb 26, 2013 | Computers & Internet

1 Answer

Dont show video but it turn on perfectly

Usually indicates a bad Power Supply.

LED lights light, fans spin, but NO Signal on monitor.

No Video Signal, because the computer isn't sending one out.
Because the computer isn't working.

Know this;

1) If ALL the LED's 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.

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

However not to jump the diagnostic flow chart; check the monitor cable FIRST.
Use on another known to be working computer. If it checks out OK, the problem is the computer, and I think -> Power Supply.

Test the 3 main voltages on the Power Supply, with a multimeter set to DC Voltage; OR use a KNOWN to be good, Compatible power supply, for a test unit.

For additional questions please post in a Comment.

Dec 29, 2012 | Computers & Internet

2 Answers

I have an old hp v75 desktop that the monitor won't turn on all the lights are working, fan running, nothing wrong with the power supply, but when I press the power button it turns on, but the monitor...

First remove the vga cable from the desktop and see the monitor shows no conection if showing there is no problem with ur monitor if not change the monitor if showing conect the cable back to ur desk to vga port then check the ram remove the ram clean the surface with clean cloth then rub the print using an eraser then insert the ram and switch on if still no display change the ram if still not working remove the processor heat sink na clean th surface of the processor and the heat sink apply a thin layer of heatsink solvent or thermal paste fix the heat sink then restart the computer

Jun 29, 2012 | Computers & Internet

1 Answer

How can i tell a bad motherboard

You should check out the monitor cable first, then check the Power Supply.

If the monitor cable is removable from the monitor, take it off, (Computer off), and use it on a KNOWN to be working computer, and monitor.
(Or use the KNOWN, to be good monitor cable from that computer, for a test unit )

Monitor cable checks out? Then onto the Power Supply. Need to know how to check the Power Supply out, post back in a Comment.

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.

This is why you may see LED lights light, and fans run, (Including Power Supply fan), but there is no video signal, (No Signal), to the monitor.

Power Supply has a weak voltage power rail, and the Processor isn't operating.

A computer that is dirty inside, will also not work.

(I just cleaned the most dirtiest computer, I have seen in over 14 years.
Dell desktop computer used in a liquor store.

Power supply fan, and computer case fan on back, was so clogged with 'gunk', that you could JUST make them out!

Inside of computer had 3/4 of an Inch thick, of dust, dirt, hair, you name it, on the bottom of the computer case.

Processor fan was so clogged with the above named gunk, it looked like it wasn't there! Had to dig it out to see it!

Finned heatsink under the processor fan, was so clogged, it looked like a square block! No fins showing!

Cigarette/cigar smoke residue on all fan blades, plus a THICK coating of dust/dirt.

I took everything apart, used Q-tips dipped in Isopropyl Alcohol, (91 percent), a small soft brush, and FOUR cans of compressed air for computers!

Isopropyl alcohol, (Rubbing alcohol), is EXTREMELY FLAMMABLE!
Use in a WELL ventilated area with NO sparks or flames present! }

Cleaned out the inside of the Power Supply's case with a can of compressed air for computers.
That was a week ago, and computer is working fine so far )

If there is damage to the motherboard itself, the damage is usually visual.
This is because you can see visual damage to the Electrolytic Capacitors, on the motherboard. The weakest link,

Rarely does the Northbridge chip, or Southbridge chip fail.
(Motherboard chipset)
Unless a power brownout, or lightning strike.

If so all the hardware components on the motherboard, are probably toast. (i.e., Processor, Ram Memory, Harddrive, and Graphics Card, or graphics chipset. {Integrated Graphics )

Sometimes it's just loose Ram Memory module/s, in their ram memory slots. (Module = 'Stick' )
They may look to be seated in the slot, but need to be taken out, and put back in, to ensure they are seated well in the slot.

The Ram Memory modules, also have gold plated contact pins on the bottom,

Corrosion builds up on these gold plated contact pins, and makes a bad contact. (Gold isn't supposed to corrode. Using corrode for easy explanation)

Doesn't take much, and a bad contact develops. Isn't discernible by the human eye, unless you know what you are looking for.
Computer unplugged from power, Anti-Static Precautions FOLLOWED, remove the ram memory module/s.

Use a pencil eraser, and clean the gold plated contact pins. BOTH sides. Doesn't take much rubbing on each contact pin, to clean it.

If you are using a pencil eraser on the end of a pencil, and not a solid eraser, refrain from letting the metal band, contact the gold plated contact pins.

The motherboard is the FIRST thing people suspect, when in reality it is the LAST thing to suspect.

For additional questions please post in a Comment.


Jun 23, 2012 | Intel Motherboard

2 Answers

The LED in my motherboard is on, but if i turn on the switch, their is no response. the power connection is correct. but it doesn't work

Try swapping the power button connection with the reset button connection. Then to turn on your computer you will need to press the reset button. If that works you have a faulty power button. Otherwise try using a different PSU. One that you know works. If that doesn't help the motherboard will have to be replaced.

Jun 18, 2011 | ASUS P5VD2-VM SE - Motherboard - micro ATX...

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


I like that. Kinda' rhymes. "Fan OK but no Display"

Problem is your Processor isn't turned on.

You have a bad Power Supply.
> Weak voltage power rail.

You probably have a 200 to 300 Watt power supply. (SMPS)

1) ALL of the LED lights together use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts.

3) A typical Processor can use 51 to 125 watts. Depends on what Processor it is.

The Intel D845GVSR motherboard uses a Socket 478 processor socket.
Supports Intel Celeron, Intel Pentium 4, and Intel Celeron D, that utilize a Socket 478 processor socket, and have a maximum FSB of 533MHz.

Utilizes the Intel 845GV motherboard chipset.
[ Intel 82845GV Northbridge chip, and Intel ICH4 Southbridge chip ]

89 Watts is the maximum wattage, that can be used by a Processor for the Intel D845GVSR motherboard.

Power Supply has enough power to light LED lights, and spins fans, but not enough to turn the Processor on.
No Processor operating, No computer.
No computer, No video signal to the monitor.
(No Signal)

Do you have access to a KNOWN to be good, compatible Power Supply, for a test unit?

Motherboard Manual in PDF file form:

Under the heading > Documents and Guides, left-click on > Product Guides for D845GVSR.
Then left-click on the first file listed.
Product Guide - PDF File Name: D845GVSR_ProductGuide_English.pdf

Nov 03, 2010 | Intel D845GVSR Motherboard

2 Answers

When powering on get no input to monitor board nu a7n8x-e

Make sure you have connected into the correct video port. DVI should be used for LCD monitors and VGA should be used for CRT monitors. Since both ports look the same people often get confused. Try it and let me know.


Jan 02, 2010 | ASUS A7N8X-E Deluxe NForce 2 Ultra 400...

1 Answer

Hi MY Dell OptiPlex GX620 have a hardware

try the bios settings is your monitor in a grafics card slot
also see if plug and play is enabled only use a keybard and mouse with a ps2 conection not usb

Nov 24, 2009 | Dell OptiPlex GX620n PC Desktop

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

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