Question about ASUS K8V-MX Motherboard

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Sony KBR 70"

TV would not turn on. TV tech tried changing the power module. Now says that there is a short in the wiring harness and that he has to test each wire. Have been witout the TV now for three weeks. Does his answer make sense?

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Thanks. There apparently was a crimp in one of the wires in the harness. This was discovered after six weeks and fixed.

Posted on Aug 18, 2008

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Error message- chasis intruded system halted

Posted on Aug 17, 2008

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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

Whenever i try to turn the computer on, it does flash on and then goes off almost immediately> I have replaced virtually everything..The CPU, The Power supply, The Mother Board< Graphics...


RAM might be one of the major issues.
You should have started trouble shooting by changing the RAM
If you have more than one RAM module try one by one.
Also try clearing your BIOS settings.

Nov 21, 2010 | ASUS P5VD2-MX SE Motherboard

2 Answers

MOTHERBOARD VIDEO PORT IS NOT WORKING BUT THE LCD IS POWER ON AND THE CPU IS ON BUT NO DISPLAY. WHAT IS THE PROBLEM ?


Hi check the monitor is working, next the check the RAM & CMOS battery or change, final add a addon Video Card and check

May 05, 2010 | Motherboards

1 Answer

Tv refuses to power on


check power connection. try it on another outlet that you're sure that has power. make sure that you're connecting it on outlet with the same power rating as your tv. if no go, then you might want to have it check by a local tech. it's possible that the power supply inside the tv is fried already.

Mar 12, 2010 | Sony MOUNTED C. BOARD, SE-800 (A1097229A)...

1 Answer

HOW TO FIX POWER MODULE PROBLEM ON hp pavillion dv9500. The power cord is ok, but the module must be broke because the blue light goes on and off depending on how how move the cord at the connection site....


yes thia is right,and these a electronics tech. area. try to go repair shop, to change-it. Dont try to replace, bacause you dont have necessary tools. there is 6 to 8 layer motherboard, normaly you damage the motherboard, if you try.

Jan 02, 2010 | HP Pavilion dv9500 dv9600 and dv9700 FF...

2 Answers

MOTHER BOARD NOT POWERING ON


Hi, 

I want you to try first swap the power supply box  of the PC if no change ?
go to the CPU socket remove the CPU check if any component is burnt that area if ok put a new CPU  then on it . 
If still behaving the same ,then the mother board is bad get a new mother board

Good luck  

Oct 01, 2009 | Foxconn P9657AA-8EKRS2H (6938279104065)...

4 Answers

My HP photosmart 2710 will not turn on. There is 31 volts going into it??


Option 1

If you have a blinking light try changing cart.

Option 2

If the unit is blackout change the power supply. Here are the specs

Power specifications

* Power consumption: 75 W maximum
* Input voltage: AC 100 to 240 volts - 2 A 50-60Hz, grounded
* Output voltage: DC 31 volts === 2420 mA



Sep 16, 2009 | Motherboards

3 Answers

Error Boot "Chasis Intruded fatal Error System Halted"


Well it seems like that the cmos battery is down. You need to do the following

Change the CMOS battery,
Enter into bios and change the date and time properly,
Save and exit bios.

Now you should be able start your computer in windows.

Nov 26, 2008 | ASUS P5P800S Motherboard

1 Answer

Power problem


Please do NOT TRY TO SWITCH ON your comp in same condition again as you would be damaging it further. Its not your power supply alone there EXISTS A SHORT CIRCUIT IN OTHER COMPONENTS as well . The SHORT CIRCUIT Protection circuit of your Power Supply senses this and switches off preventing further damage . Well you could try this - Disconnect power to all the componenets like HDD , CD/DVD , MOTHERBOARD and FDD etc.,. Plug in the AC input power to your Power supply and on the 20 pin connector look for green colored wire and black wire on the same connector and short these 2 wires ONLY with a metal paper clip or a piece of wire , if the fan in the PS works and spins at full speed till you disconnect or remove the short between the two wires (Green and Black) then your PS is Working FINE . Now connect each of the component's power connector only and repeat the same exercise you will be able to identify which component is shorted.

May 01, 2008 | EliteGroup P4VMM2 Motherboard

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