Question about Intel Motherboard

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I have NEC wa2510 workstation for sercel 428XL seismic acquisition.I have some problem in system boot.After power "on" ,I can't see in monitor any massage.Pl..

First Power On, the system don't start.Monitor is black out but monitor is ok.

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Seismic work, huh? I'm an old 'Doodlebugger' from back in the '80's.
(Vibroseis, and 'Shothole' {Dynamite)

Geophones have changed!

No error message on screen, nor do you hear BIOS Beep Codes?

Suggest use the monitor, and monitor cable on a KNOWN to be working computer, to make sure monitor AND cable are good.

Monitor and monitor cable show to be good, move on.

The two main problems for desktop computer failure; are the computer is dirty inside, and Power Supply failure.

Motherboards get blamed all the time, when the problem was just a bad Power Supply.

Anti-Static Precautions:
Your body carries Static electricity. Static WILL fry out (Short Circuit), the delicate hardware components inside a computer.

Relieve your body of Static BEFORE reaching inside your computer.

Computer ON a table, (NOT a bed, couch, or directly on a carpet floor!), computer unplugged from power, computer case open;
TOUCH an unpainted surface, of the metal frame of the open computer case.

This action will relieve your body of Static.
IF you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return.

1) Is the computer dirty inside?
Use a can, or two of compressed air for computers, and clean it out.
'Gunk' = dirt, dust, hair, lint, food crumbs, name it.

For heavy gunk I use Q-tips to 'stir' it a little bit, so the compressed air can remove it easier. (Saves on air too!)
Q-tips are good for the Processor fan blades, and where the fan blades meet the center hub.

The finned Heatsink sitting on the Processor, MUST be clean also.
Fan and Heatsink -> CLEAN, then move on to the rest of the inside, of the computer.

2) While you're in there remove ALL ram memory modules, ('Stick'), and clean the gold plated contact pins.

The BODY is everywhere on the ram memory module, EXCEPT the gold plated contact pins at the Bottom.
Handle the ram memory module by the Body.
The Body is coated with a see-through protective plastic.

Note that the bottom of the ram memory module shown, is DDR Sdram. Has 184 gold plated contact pins. 92 on each side.
Your motherboard uses DDR2 Sdram.
Has 240 gold plated contact pins. 120 on each side.

(DDR2 Sdram at either 400MegaHertz, 533MHz, or 667MHz.
That is PC2-3200, PC2-4200, (Or PC2-4300), and PC2-5300; respectively. Also is ECC. Error Correcting Checking. It's a server computer)

NOTE the Locating Notch on the bottom. Is NOT centered. The Locating Notch lines up with a Locating Lug, in the bottom of the ram memory slot. ONLY goes in one direction; one way.

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

Rub across all pins, (BOTH sides), plus up, and down. Doesn't take much pressure, nor rubbing.
(If the pencil eraser is dirty when you start, clean it off first by rubbing on a sheet of clean white paper)

When finished use air to remove the eraser dust. You can use a can of compressed air if available, or air pressure from your mouth will be sufficient.
Reinstall the ram memory modules.

This is the motherboard used in an NEC wa2510 desktop computer,

This is the download page for the Motherboard Manual, (User Manual),

Click on the Second file listed.
User Guide -> S2927_UG_v1_1

Click on the green --> S2927_UG_V1_1

3) Look at the capacitors on the motherboard.
Solid capacitors, and Electrolytic capacitors.

The solid capacitors are Polymer solid capacitors. These are the little 'cans' that have a blue marking on one side, and on top.
If one of them is bad you will know it. They explode like a miniature grenade. Sends shrapnel all over inside the computer case.

The Electrolytic capacitors are Radial Aluminum Electrolytic Capacitors.
These often fail. This is why solid 'caps' were brought out.

See if any of these 'puppies' are bad.
(Yes, they can be replaced if bad, and I can guide you)

Why could just some of the Electrolytic Capacitors be bad?
KNOW this,

YES. Still affecting use today all over the world.

4) Power Supply:
The Power Supply is an SMPS. Switched-Mode Power Supply.
It is cooled by air, just like the rest of the computer hardware components, inside the computer.

The cooling components are Heatsinks, and the small internal fan,

Click on the photo to the upper right; of the open SMPS.
The letter B marks the Input Stage capacitors. They are Electrolytic Capacitors. (And specifically Radial Aluminum Electrolytic Capacitor)

The incoming 100 to 240 Volts AC, is handled by them.
In between the letter B, and C; is a Heatsink.

Rectangular 'silvery' looking blocks, connected together. The 'Blocks are actually fins.
There is another one in-between the letters C and D, also.
(The Electrolytic Capacitors marked by the letter E, are in the Output Stage)

The Heatsink's absorb heat from whatever they are placed against. Then the tall, thin fins; radiate the heat away. Air flow from the small internal fan, helps to carry heat away from the fins of the Heatsink.

If the fins of the Heatsink are clogged, and the fan blades, center hub, and shroud, (Surrounding cage) are dirty; the Power Supply overheats.

Heat = Wasted Energy.
The Power Supply strains to keep up with the call for power, but eventually cannot, and components inside it fail.

This makes a weak voltage power rail.

(There are 3 main voltage power rails;
3.3 Volts, 5 Volts, and 12 Volts. ALL are DC Voltage.
The Power Supply is a Converter. It converts the high, dangerous 100 to 240 Volts AC, to the low DC Voltages stated above.
In comparison two D cell flashlight batteries produce 3 Volts DC)

With a Power Supply having a weak voltage power rail, you can see LED lights light, and fans spin. But there will NOT be enough power for the Processor. Means the computer isn't working.

A) If ALL of the LED lights were on at once, they would 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. Just depends on what Processor it is.
Since this Tyan motherboard supports AMD Opteron processors, that fit in a Socket F processor socket, and are of the 2000 series;
could be from 95 Watts to 115 Watts.

Also take that number times TWO. There are two processor sockets, and two processors can be used.

Power Supply is checked with a multimeter set to DC Voltage.
Have a multimeter? I can guide you.

5) Do you have the Restoration Disk?
Install, and when asked choose Repair. (Non-Destructive Installation)
Just repairs the basic Windows files, and leaves programs/ applications alone.

Post back in a Comment.


(Looking at the user photo of yours, reminds me of when I was your age, and in oil exploration. Wish I was there, lol!)

Posted on Jan 05, 2013


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