Question about Compaq Evo D310M 845G P4 Motherboard

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Motherboard Hit by lightning, power surge

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  • Twins11 Apr 18, 2008

    New Power supply blinks when the 24 pin connector is pluged in.

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EVOD510 FF (33 MGB)in place of this can I use this Evo D310M 845G P4 Motherboard please suggest.

tks & regards

Sreenivas
banesree2006@gmail.com

Posted on Apr 22, 2008

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My mother board does not start. The fan movs for a fraction of second and powers off. How to repair the motherboard vrm section


Unless you are a skilled electronics repair technician, attempting to repair a motherboard is like attempting brain surgery. First, you don't have a schematic diagram to even know what components are necessarily suspect. You don't have the diagnostic equipment to determine which components have failed. Most MB failures of this sort are caused by power surges and most like the failed components are some of the micro-mini components on the board. You are most likely going to damage the board further in any attempt to repair. These boards are mass-produced and even the manufacturers rarely repair them. If you return one under warranty, they test it to see why it failed, and if the failure was due to a defect in materials, they will replace it with the same board or one that is newer and better. If the board failed under non-warranted conditions, such as ESD mishandling or power/lightning surges, they will not replace the board without charge. You are better off just getting a new board.

Sep 30, 2015 | Motherboards

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Does this means my motherboard is burned out


No it means you have a bunch of bad Electrolytic Capacitors.

Maybe a bad motherboard.

(Hey good photo!)

http://www.capacitorlab.com/visible-failures/index.htm

Looks like they are by the Northbridge chip. Under that black finned Heatsink.
(The Northbridge, and Southbridge chip makes up the motherboard chipset.

http://en.wikipedia.org/wiki/File:Motherboard_diagram.svg

http://en.wikipedia.org/wiki/File:ASRock_K7VT4A_Pro_Mainboard_Labeled_English.svg )

Due to how bad they look, (Looks like i can see small holes, in the top of three of them), I would venture to say the computer was in;

1) Electrical storm. Lightning strike hit near your utility power pole.

2) Utility power company working on the utility line, replaced a line pole transformer for your area, and had the voltage set to high on the transformer. (If so you had better check, or have checked, your power. 120 volts AC range, is 108 to 127 volts. 220 volts AC range, is 208 to 227.
(My country uses 120 Volts AC.
I had a line transformer that was set to 164 Volts!
Yes.
Had journeyman lineman set it down from the utility company!)

3) Brownout: Power in your area went out. Caused by overload on the utility power companies power transmission system. Too much power used at all once, by the power utility customers.
Causes a power surge.

3) Power supply voltage switch set to 110 volts, and computer plugged into 220.

That's what usually pops holes in the thin aluminum Vent Cover, of those Radial Aluminum Electrolytic Capacitors.

http://www.youtube.com/watch?v=YCSNWi3UHf4

No holes? Just black flecks of Electrolytic Paste that has fried?
Then the capacitors just went bad, is all.
This happens. Details in a minute.

Not a lightning strike, or power surge, or wrong voltage setting?
I would say a good chance you can replace them, and have a working mobo again. (MOtherBOard)

Primer:
Electrolytic Capacitor basic construction;

The style used on your motherboard are Radial. Both leads come out of the bottom. (Leads; think stiff wires)
They are also Aluminum Electrolytic capacitors.

Radial Aluminum Electrolytic Capacitor

The outside case is a thin aluminum cylinder. What you mostly see is a plastic sleeve on the outside.

The top of the cylinder is sealed with a Vent Cover.
A thin round flat aluminum disk, that has a shape etched partway into it. Usually a lK or X.

The bottom of the cylinder is sealed also. A thin, synthetic rubber round disk. It is the Bung. The leads of the capacitor poke through the Bung.

Inside are 3 types of strips.
A) One strip is a foil thin metal strip, and is the Conducting Strip. It has the Positive ( + ) lead connected to it.

B) One strip is also a foil thin metal strip, but has a non-conducting medium applied to it. It is the Non-Conducting strip, and has the Negative ( - ) lead connected to it.

C) The last strip is composed of a paper-like substance, and is soaked with Electrolytic Paste.

The Electrolytic paste soaked strip is laid in-between the two metal strips, and all three are rolled up tightly.
(There are MANY of these layers in an average Electrolytic Capacitor)

When an Electrolytic Capacitor goes bad the paste inside develops a gas. Hydrogen gas.
The gas expands inside the case. The resulting pressure compromises a seal, or both seals.

Can pop the Vent Cover open, as in your photo, and ooze out.
And/or can ooze out around the Vent Cover.

And/or can push one side of the rubber like Bung, out of the case, and ooze out.
(Capacitor is usually on a lean because of this)
And/or can ooze out around the outside edges of the Bung.

So much paste loss, and the capacitor operates at a weakened state.
Too much paste loss, and the capacitor fails.

Primer over.

Yes. Those capacitors have gone to 'capacitor heaven'.

http://www.hardwaresecrets.com/article/How-to-Identify-Japanese-Electrolytic-Capacitors/595

(Not just the Japanese manufacturers. Also on other manufacturers)

http://www.mouser.com/Passive-Components/Capacitors/Aluminum-Electrolytic-Capacitors/Aluminum-Electrolytic-Capacitors-Leaded/_/N-75hqw?P=1z0z7l5

(Need help using the above let me know in a Comment)

Due to your statement,
" Does this mean my motherboard is burned out?",
makes me think it was involved in a power surge.

Electrolytic Capacitor's paste breaks down over time. The computer engineers know this, and use capacitors rated at 2 times what is needed.
This way when the capacitor breaks down to 50 percent good, it is still 100 percent good for it's application.

They are used as Filters, and Voltage Regulators.
They are also the weakest link.

It MAY be that the power surge just fried a few capacitors. OR, it may be that the power surge went past them, and fried other components on the motherboard.

Motherboard chipset, chokes, also other Integrated Circuits, (I.C.), and what have you.
Not worth your trouble, EVEN if you can obtain the motherboard chips. (Plus they are mounted with a BGA surface mount)

Just went p-oof one day when you were using it? Myself I would try replacing the capacitors, but that's just how I ride.

Need guidance in doing so post in a Comment. This IS my A.O.E.

{ Just a note. In case you are thinking of rating this, hold off.
After it is rated, and a small time period, we can no longer converse.
At least that has been what I have seen in the last 3 years here.

Rating? Points? Don't care. Hearing back from you is what I prefer }

Jul 08, 2012 | Motherboards

1 Answer

When i connect the lan wire my mother board shows lan not connected why/


Either the cable is defective (it has a break inside it so try another one) or the onboard LAN chip was fried by the power surge generated by a lightning strike that came in your vicinity.
That is unfixable, disable the onboard one from the BIOS and install a simple PCI LAN card in its place.

Aug 17, 2011 | Intel D945GCCR Motherboard

2 Answers

I have bought a new pc with intel DH55PJ motherboard , core i3 540m processor , and 2GB DDR3 ram . After 2 days of purchase , the PC does not start , when the power button is being pushed on the cabinet. I...


Sounds like a power supply or power outlet problem.
If it's still under warrant, return the unit for repair and get it fixed.
After you get it back do not connect it directly to a power outlet.
You would like to purchase a good surge protector and connect you PC to the surge protector first.
You might have a noisy power lines, and or spikes and surges.
The surge protector will secure your PC Power Supply.
You can purchase one from Amazon.com:

http://www.amazon.com/APC-Outlet-3400J-Surge-Protector/dp/B0012YFXSW/ref=sr_1_5?s=electronics&ie=UTF8&qid=1299861329&sr=1-5

Hope this will give you some ideas.

Mar 11, 2011 | Intel DH55PJ Classic Series MicroATX...

1 Answer

My desktop board is P5NSLI, suddenly when i'm working with it, a lightning splash because its raining, i turned off my computer 'cause i'm worried if what may happened, after the rain i get back to work...


This may have been due to power surge. Try replacing the power supply. Also, inspect the motherboard and other components for any physical damage. Motherboard may get damaged due to power fluctuations, which requires replacement.
CreativeTECH

Nov 23, 2010 | ASUS P5NSLI (0610839134670) Motherboard

1 Answer

Computer will not turn on. Possible power surge.


If the power supply is good then your motherboard must have gone bad during a surge.

Dec 26, 2009 | Intel D865PERL Motherboard

1 Answer

Comp. does'nt turn on. power is good


Your question fails to provide sufficient information.

.."doesn;t turn on power good...."
do any lights on the pc illuminate
was it working before, and did it close down correctly
has it possibly been hit by lightning
have you recently opened the case to install new hardware?

Possible causes of a failed power up.
dead power supply
a video card not seated in its slot correctly
dud motherboard
motherboard installed incorrectly
no Bios battery on motherboard
faulty wall switch
faulty power pack switch
no ram installed

and on and on

thanks for using FIXYA

Oct 10, 2009 | Intel Motherboard

1 Answer

Compaq presario c300 wont turn on at all


Looks like a bad motherboard ,have you tried another power adapter the one that connects to the wall socket.
The motherboard could cost over $100 ,chepaer on Ebay or you could take it to a Compaq/HP service center and ask for a quote on the repair.

May 13, 2009 | HP Compaq Motherboard

2 Answers

Sound buzzes after lightning storm, replaced soundcard, no change


Have you tried the speakers on any other source?

Have you replaced any power surge or power strips that you may be plugged into, Or at least tried to plug into a different source.

You issue may just be an unclean source of power.


Let us know
Good luck

Apr 15, 2009 | Dell (E210882) Motherboard

1 Answer

How to diagnose:


try removing the power plug at the back of your PC then the processor and memory for 10 sec. and then put it back...power on and observe...if you got same problem try to test each caps, fuse and transistor of the board probably around the proc.and mem. area...you might point out which piece to replace.I hope that would help you..

Sep 24, 2007 | Abit IS7 Motherboard

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