Question about Intel Motherboard

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Did i kil the mobo?

Recently doing a dc jack repair on a dell laptop when i accidentally knocked a small rectangular shape black thing of the board, i think it was a small fuse (so i'm told) however i didn't realize until after i tried to power up the laptop and it never worked, i managed to find the fuse(assuming it is a fuse) and im wondering is it fixable or will i bin it and order a new one.
Any replies are appreciated
Thanks
James...

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  • burnsj Dec 27, 2008

    Hi, thanks for the reply wiz but im wondering does anyone know if a laptop has been powered up without this small component does it kill it???

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If you are comfortable using a soldering iron and know exactly the part & place to fix you could try to replace, but if you are not confident doing this then a replacement board would be the best solution. Hope this helps & please remember to rate my answer.

Posted on Dec 27, 2008

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2 Answers

Hp 625 no power on


Test your PSU power supply unit or replace it if your power supply units fan is not working your PSU is faulty http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules

Test all power and data leads that attach to your hard drive IDE,SATA
The leads from your MOTHERBOARD TO YOUR HARD DRIVE make sure they have secure dust free connections and are not faulty. Any bad or faulty power or data lead or connection can cause a computer not boot up.
Motherboard and a Hard Drive any leads between them will fail before your motherboard or your hard drive if its a flat ribbon 40 pin type IDE replace it this will be the first to fail. Make sure your graphics card is securely seated with no dust built up or in the socket if you remove your graphics check the socket to make sure its dust free restart your computer then reinstall it this should activate found new hardware wizard Make sure all leads that are attached to your drives dvd\cd floppy have secure dust free connections and are not faulty or just replace them they could be faulty a computer needs Power and Data to travel through every working device and to continue its cycle and have an end so any faulty leads will end up with a computer error even something as small as a faulty power lead or fan lead can cause you problems computers need all of the data and electrical current to travel through every working device and to have an end to be able work properly Make sure ram modules and cmos batteries have dust free secure seatings and cmos battery has charge some motherboards cmos batteries are soldered in Check you CPU make sure its securely seated and has thermal grease http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-February-2012/1490 Hope this helps.

Dec 10, 2012 | HP Computers & Internet

1 Answer

Gateway id49c notebook power issues


http://support.gateway.com/s/notebook/2010/gateway/id/id49C/ID49Cnv.shtml

1) Test the AC adapter (Charger) first.

http://www.itsbattery.com/gateway-ac-adapter/Gateway-ID49C-AC-Adapter.html

Test with a multimeter.
(An economical multimeter can be purchased for as little as $5 to $12. Available in a multitude of stores. An auto parts store is but one example. Checkout aisles of major discount stores, may have them on the rack)

Function knob set to DC Voltage.
(If just a symbol the symbol is a dotted line over a solid line)
If more than one DC Voltage scale set it to the 0 - 50 Volt scale.

Positive (Red) probe lead of multimeter goes to the Center Hole, of the plug end that plugs into the laptop.
Negative (Black) probe lead touches the cylindrical metal shell, on the outside of the plug end.

You should be reading 19 Volts DC.

Also have an assistant gently wiggle the cable from AC adapter to laptop, and power cable to AC adapter (Charger)
Fluctuation in the reading means you have broken wires.

AC adapter checks out OK?

2) DC Power Jack:

The DC Power Jack is the jack on the laptop, that you plug the AC adapter (Charger) into. (DC_IN)

Battery removed, (And AC adapter, 'natch), use a No.2 pencil, and with the eraser, gently see if you can move the Center Pin around.
ANY perceptible movement means damage to the DC Power Jack, and replacement.

3) AC adapter and DC Power Jack checks out?

Problems with the Power MOSFETs used in the power section, on the motherboard, or possibly Ceramic Capacitor failure.
(Multi-Layer Ceramic Capacitor, and they are Surface Mount Devices)

Using the HP Pavilion dv6000 series, and Pavilion dv9000 series of Notebook PC's, as an example,

http://mayohardware.blogspot.com/2010/04/important-parts-on-dv6000-and-dv9000.html

Looking down at the second photo with the Alpha and Omega Semiconductor - AO4407 - Power MOSFET circled in Yellow, look at the small rectangular shaped object to it's Right. Has a wide dark band on it.

This is a Ceramic Capacitor.
There is one above it of the same size, one above that one, and one to the right of the top one.
If any one of these, or the Power MOSFETs are blistered, blackened, or bubbled, they need to be replaced.

Due to issues that could arise by replacing, and having more components be bad, or go bad; the logical choice by most tech's is to simply replace the motherboard.
(Also puts more dinero in their pockets)

[ Your user name reminds me of Hee-Haw. "If it wasn't for bad luck I wouldn't have any at all." Lol!

Hey...........it's going to get BETTER! ]

For additional questions please post in a Comment.

Regards,
joecoolvette

Oct 16, 2012 | Gateway mb.wq502.001 - Id49c Intel Laptop...

1 Answer

Ihave mbx -160 ms70 sony laptop mother board ther is no power adapter is working pleas telme whatare the comapnents i have to chek in power section


A) Check the DC Power Jack.

The DC Power Jack is the jack that the AC adapter (Charger) plugs into. (May state DC_IN near the jack on the outside of the laptop case)

IF, I have it right, there is a DC Power Harness. The DC Power Jack is connected to wires in a harness, and the harness has a plug on the end. The DC Power Harness plugs into the motherboard.

http://www.laptoppartsexpert.com/i-131440-dc-jack-w-cable.html

[Instead of the DC Power Jack being soldered to the motherboard]

Remove the DC Power Harness, and with a multimeter set to OHM's perform a continuity check of all wires in that harness.
See if the DC Power Jack of the harness, is in good shape.

DC Power Harness checks out?
Problem is with the Power MOSFET's on the motherboard, or a ceramic capacitor, or two.

!O_O!

MOSFET,

http://en.wikipedia.org/wiki/MOSFET

Power MOSFET,

http://en.wikipedia.org/wiki/Power_MOSFET

Don't know who makes the P.MOSFET's on the motherboard, or what manufacturer number they are.
They are however, located Near the connector on the motherboard for the DC Power Harness, and they have 8 J-leads.

This is an example of a Fairchild Semiconductor FDS6675BZ
Power MOSFET. One example of a P.MOSFET used in this application, on a LOT of laptops,

https://docs.google.com/viewer?a=v&q=cache:oER5NNz8cwcJ:www.fairchildsemi.com/ds/FD/FDS6675BZ.pdf+Fairchild+FDS6675BZ&hl=en&pid=bl&srcid=ADGEEShOhWPjm_M-ROHme4iEMrztCTOd-28jNiy1hVLQQh_VOyv8zcXEVDB_iTQA6MuZO88UmRkDgjyW9j4CP2aIJ-4DS-h6JNM3lvxldeApQeecmz_DADCw1s7tmNLxfPknqX14SZP6&sig=AHIEtbS_rYUAeo_8rB9YHkW05ZjLqeH4Jg

Note the leads coming off of both sides. Those are 'J-leads'.

See if any of the Power MOSFET's, or Ceramic Capacitors, are burnt, and/or bubbled.

This gives you more information, but is using HP Pavilion dv6000, and Pavilion dv9000 series of Notebook PC's, as an example,

http://mayohardware.blogspot.com/2010/04/important-parts-on-dv6000-and-dv9000.html

Here you see the two Power MOSFET's used. One on top of the motherboard in the power section area, one on the bottom of the motherboard.

Looking at the second photo with the Alpha and Omega AO4407, Power MOSFET as an example, look to the right of the yellow circled AO4407.

To the right is a Ceramic Capacitor.
Rectangular in shape, and looks like there is a black wide band across the middle. There are two more above it. See if one, or more of these are burnt.

http://www.mouser.com/Search/Refine.aspx?Keyword=FDS6679

That's right. A Fairchild Semiconductor FDS6679 Power MOSFET is $1.01 USD, without tax, and shipping.

Just an example of cost.

http://www.mouser.com/Passive-Components/Capacitors/Ceramic-Capacitors/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT/_/N-b2cj?P=1z0ynasZ1z0vhw8

Scroll down. Average cost is from 9 cents to 80 cents USD.

Regards,
joecoolvette

Sep 29, 2012 | Sony A1246282A - VAIO VGN-N Series Laptop...

1 Answer

My DC jack broke what should i do.


I am assuming you mean the DC jack on the motherboard in your laptop?
You can repair it yourself, or take it to a repair shop and pay to have someone do it.
To repair it yourself, you'll need:
1) A new DC jack (though sometimes you can fix the broken one)
2) The disassembly guide to your specific model of laptop. Google the phrase "laptop make/model disassembly" and one should come up pretty quickly. Guides are generally step-by-step with pictures included, and putting it back together is just the reverse of disassembly.
3) A soldering iron and solder. 15-30 watts for delicated boards like a motherboard. Once you've pulled your motherboard out, You can de-solder the broken DC jack from the motherboard (if necessary) and solder the new one on. DC jacks are generally 2-4 solder points and fairly simple to press back on.

May 26, 2011 | Computers & Internet

2 Answers

Is there an easier way to replace a dc power jack than soldering it? On an Inspiron 2200.


no
i'm afriad not my friend -- i have desoldered and soldered many DC jacks for Acers, dells, HP, IBM

Dell are some what eassiest, for most notebooks..just make sure

here is a video to help you

http://www.youtube.com/watch?v=1q0ln61p4hY

please rate my service

Nov 10, 2010 | Dell (8N816) Motherboard

1 Answer

HP Pavilion dv6000 plugged in not charging, I have a new battery.....PLZ Help.


Its the DC charging jack that you plug the charger into on one of the sides of the laptop. Do a google search, go and search for "HP dv6000 DC jack problem charging" (leave out the quotes) and you will see this is a common issue with the dv6000 and laptops in general. Many will just replace the whole laptop motherboard as the DC jack is attached to the board. If you know what you're doing, you change out the jack, quick repair job and keep your own board, but fixed. I would fix it if it were mine. You may be able to find someone local online but if you need someone to do the repair, I'm in the repair directory, as are many others qualified.


Note: It may come to a point, or the situation may just fit better to replace the entire board instead of the port alone. This is usually when the jack is not seated and easily replaceable, or if you are under warranty, HP will replace the whole board.


Mar 08, 2010 | HP Pavilion dv6000 Motherboard

2 Answers

Hello I have a dell Latitude D610 laptop, The system works great running off the batter. The dc jack was broken, so I de-soldered the broken jack, and noticied a a couple of scratches on the board by the...


Yes, you should be concerned.

First of all ... the etched electrical traces on motherboards, or any other electronic circuit board for that matter, are very thin.

You need to make sure you are using a soldering iron which allows you to regulate the temperature of the tip of the soldering iron.

If your iron is too hot, the pads will definitely be lifted from the board.
Secondly, the scratch you can visibly see with your naked eye could "potemtially" be deep enough to cut entirely through the trace on the board.

I'm not implying this is the case in your scenario, however, you need to consider the possibility.

When it comes to repairs of this nature, "skilled" techs have gone thorough a "micro minature" repair couse in which the individual learns the proper processes and procedures necessary to make the types of repairs you are describing.

During these classes, the use of a microscope coupled with a steady hand, is absolutely necessary.

In your particular case, I would attempt to resolder the connection and hope for the best, especially if you don't have the proper equipment to effect the repair.

If you attempt the repair only to find out you still have the same problem, all is not lost. You may find that you do in fact have a broken trace.

You can circumvent this problem by utilizing a wire soldered between points A and B.

In summary.... try to resolder the jack first. With luck... you will be done at this point.

If not..... you will definitely need to examine the board to find out if any of the traces have been severed.

If you need any other assistance..... don't hesitate to ask.

Good Luck!!






Dec 03, 2009 | Dell (002TR) Motherboard

1 Answer

Toshiba plug-in ac adapter LCDlight flashing and wont boot up


It may be that you need a new, (Or good condition used), motherboard. You may not.

The problem could be the DC Power Jack. The DC Power Jack is small, and the body is made of plastic. Sometimes there is a metal shell around the plastic body. (The jack is a rectangular shape, and is just a little larger, than the outside portion of that AC adapter plug!)

This is an example of a DC Power jack for a Toshiba Satellite a215-s5807,
http://www.notebookworks.net/ProductDetails.asp?ProductCode=NBW52-0133

As you know there is a metal pin in the center, and at the back of the round hole, there are flat metal contacts.

Let me explain the construction of a DC Power Jack, and how it's mounted to a motherboard. This all has relevance to the solution.

Your laptop uses DC electricity. (The AC adapter converts AC to DC. Your laptop battery, and a flashlight battery, are examples of stored DC electricity)

DC uses a Positive connection, and a Negative connection. The metal pin in the center is Positive. The flat metal strips at the back are Negative.

That laptop DC Power Jack has metal prongs, that come out of the plastic body. One prong, (Or pin), connects to the Positive metal round pin, in the center of the jack.
There may be one, or two prongs, (Or pins), that come out of the plastic body, and connect to the Negative side of the jack. (Flat metal strips)
These prongs go down through holes in the motherboard, and are soldered on.

With the AC adapter plugged in, an accidental bump on the plug itself, could break the body of the jack, or break solder joints that hold the jack to the motherboard.

AC adapter removed, and battery removed. Use a NON-metallic object, and see if you can make the center pin of the jack move. See if the entire jack itself seems to move.
A.If the center pin moves, you have a broken DC Power Jack.
B.If the entire jack moves, you have cracked solder joints. (Broken)

Replacement of the DC Power Jack for A.
Re-solder the solder joint/s for B.

Cost of replacing a jack at a reputable computer repair shop? $90 to $150
Cost of re-soldering solder joints? $50 to $90
Cost of replacing the motherboard?
$250 on up.

If you are a skilled person with the correct tools, it is feasible for you to replace the jack, or re-solder the solder joints.
It is also feasible that you yourself, could replace the motherboard.

Some laptops have a poor motherboard design, for where the DC Power Jack is mounted to the motherboard.

Crude explanation would be, that the main body of the motherboard is a 1 foot square. Then a 2 inch square comes out of the side of the main body.
The DC Power Jack is mounted to that 2 inch square. From accidental bumping, OR just normal usage of inserting, and removing the AC adapter plug, this 2 inch square can crack away from the main body.
This, of course would require a motherboard replacement.

Disassembly instructions for a Satellite A200 and A205 Series laptops. Very close to the A215 Series,
http://www.irisvista.com/tech/laptops/toshiba-satellite-a205/laptop-disassembly-1.htm

(Don't forget to buy, and use a cheap ESD wrist strap, to prevent static shock to the delicate hardware components, inside your laptop. Average cost is $7)

Aug 04, 2009 | Computers & Internet

1 Answer

Acer 5920g no power


Your DC Power Jack is bad, or the area of the motherboard where the DC power jack attaches to, is bad.

The DC Power Jack, is the small port where your AC adapter,(Charger), plugs into.
This is an example of an average DC Power Jack, for an HP Pavilion laptop, not installed in a laptop yet,
http://www.megaemarket.com/dc-power-jack-hp-pavilion-ze4200-zt117420011721182125.html
If you click on the photo it will enlarge.

The DC Power Jack in the photo is upside down, in relation to how it sits on your laptop's motherboard.
Those flat metal pins shown on top, go down through the motherboard, and are soldered on the other side.

1.Sometimes when the 'charger' plug is in the jack, and is bumped, it can crack the solder joints for the DC Power Jack's flat pins. This makes an intermittent contact. Eventually there is no contact at all.

2.Sometimes it's a bad design of the DC jack, and just from ordinary usage of the user plugging in the charger, and removing it, this can crack the solder joints.

3.Sometimes the small area of the motherboard where the DC power jack is mounted, can crack away from the main body of the motherboard.
To explain:
Crude example;
Envision a laptop's motherboard as having a 1 foot square shape. (It isn't. It's irregular shaped) Now on one side attach a 2 inch square. This 2 inch square, represents the area that the DC power jack is attached to. A 'Peninsula', if you will. There are circuit traces that go along a motherboard. Think of them as Very, flat, thin, strips of copper wire. These 'wires' become stretched, and break as the 'peninsula' cracks away from the main body of the motherboard.

Solution?
Have the DC Power Jack replaced, or the motherboard.
DC Power Jack cost? About $6 to $8 dollars.
Labor? $100 to $150.
The tech has to completely disassemble the laptop, to just the bare motherboard in hand. Then unsolder the DC power jack, resolder a new one in, and reassemble the laptop.
Motherboard cost? About $150 on up. Depends on where you obtain it. (Ebay?)
Labor? $100 to $200.

Jul 12, 2009 | Acer Computers & Internet

1 Answer

Acer 2300 travelmate


you can get seperate dc jacks from here http://www.creativeit.tv/acer-laptop-dc-power-jack-repair.htm Try not to disconnect the screen as it may never come on again, i would take to a qualified repairer.

Aug 30, 2007 | Computers & Internet

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