How do i repair a toshiba satellite a205 motherboard with bad NEC 22@ capacitor

common fault.remove NEC/TOKIN capacitor.near the CPU.add 4 capacitors 330uf.

Looking up the DC Power jack for this model, shows me a Center Pin, and cylindrical metal shell; inside the jack.
Center pin is Positive, cylindrical metal shell is Negative.

Also shows it to be a DC Power Harness. Wires connected to the jack, and end in a white plug; that plugs into the motherboard,

http://www.laptopjacks.com/view_part/Toshiba-Laptop-DC-Power-Jack-TS462625.html

http://www.youtube.com/watch?v=lLPlSsEx5F4

Granted, the above is a A205-S4000 series.
(A205-S4577)

http://www.irisvista.com/tech/laptops/toshiba-satellite-a205/laptop-disassembly-3.htm

http://www.irisvista.com/tech/laptops/toshiba-satellite-a205/big/toshiba-satellite-a200-a205-17.jpg

So...................
1) Am I to assume someone broke the female connector on the motherboard, that the DC Power Harness used to plug into?

Hard wired in this statement would reflect there was a DC Power Harness, soldered directly to the motherboard?

2) Or is your statement that the DC Power Jack itself, for your model; is soldered directly to the motherboard; and you hard wired the new jack in place; after cutting the plug off of the end of the new DC Power Harness? (And removing defunct DC Power Jack)

Plus; Is this an A205-s5000, or one of the A205-s5000 model series?
A205-s5800, A205-s5801, A205-s5803, A205-S5843, etc.

Yes.

Trying to figure out why this A205, has a DC Power Jack soldered directly to the motherboard, and is not using a DC Power Harness.

Why?

Have to make sure you are soldering to the right area, yet alone the correct contact points.

Don't know what I'm talking about? You unsoldered the DC Power Jack FROM the motherboard? Or the jack was soldered to wires, and wired to the motherboard.
Hardwired. The term can be used for either scenario.
That's the way it was originally?

K

Let's go on.

The DC Power Jack is connected to the DC to DC power circuit; on the motherboard. (Power/Charging circuit)
This circuit is near where the DC Power Jack is mounted, or where the DC Power Harness plugs in.

In the circuit are Surface Mount Devices that are prone to go bad.
One is the Power MOSFET's, the second are MLCC's.

(Multi-Layer Ceramic Capacitor.
They, and the P.MOSFET's, are SMD/SMT
Surface Mount Device/ Surface Mount Technology)

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

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

Let's use the HP Pavilion dv6000 series, and Pavilion dv9000 series Notebook PC's, for an example,

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

These series of Notebook PC's use the;
Fairchild Semiconductor International - FDS6679 - Power MOSFET, and the,
Alpha & Omega Semiconductor Limited - AO4407 - Power MOSFET.

Look at the second photo down, with the AO4407 circled in Yellow.
Immediately below it, (Right corner), and immediately to the right of the AO4407; are MLCC's.
Smaller rectangular object with a dark wide band in the middle of it.

There is one above the one, to the immediate right of the AO4407; one above it, one to the Right of the top one; and one to the right of it.
There are also 4 smaller examples to the bottom/left corner of the AO4407.

Look to see if any are burned/blackened.

Example of availability, and cost of FDS6679, and AO4407,

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

Scroll down. One Dollar and one Cent, USD.

http://www.mouser.com/Search/Refine.aspx?Keyword=AO4407

Here we see the AO4407 is phased out.
Using one of the cross-reference examples given,

http://www.mouser.com/ProductDetail/Diodes-Inc/DMP3020LSS-13/?qs=%2fha2pyFadujguNNSgppBRqXbOxXLwzGsZm9SWxz1EqWpzoSJOpHpWA%3d%3d

78 Cents USD.

Just to show examples of MLCC's that are SMD/SMT.
The examples I chose are 4.7uf (MicroFarad), and 16 Volts. (DC)

http://www.mouser.com/Passive-Components/Capacitors/Ceramic-Capacitors/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT/_/N-b2cj?P=1z0wrjcZ1z0x565

Scroll down.

http://www.youtube.com/watch?v=5uiroWBkdFY

You can use a 25 Watt soldering iron, instead of a Soldering Station.
[ Plus Rosin core solder, rosin solder flux paste, flux paste brush, and Desoldering Braid. (Solder Wick ]

http://www.youtube.com/watch?v=b9FC9fAlfQE

Can things be worse? Yes,

http://koti.kapsi.fi/jpa/stuff/pix/travelmate_6292/


For additional questions please post in a Comment.
Regards,
joecoolvette

I recommend you isolate the problem first by trying to plug the AC adapter while in safe mode.to do this you need to restart your system while restarting keep on tapping the F8 key. choose safe mode first then press enter.plug the AC adapter.If it will do the same thing that it will hangup,you need to report this to Toshiba and have them replace the motherboard and AC adapter. If it works fine in safe mode. i recommend you reinstall your OS (vista xp win7).thanks

Possible cause: 1. Power adapter failure.
2. Motherboard failure.
Possible troubleshooting steps and repair solution: First of all, test the power adpater. Make sure the apdapter outputs correct voltage. It's possible that the outup voltage is not correct and the laptop shuts down to prevent the damge. Test your laptop with anohter known good power adapter.
If the problem still exists, even after replacing the adapter, most likley it's the motherboard failure. Replace the motherboard.

Reference: Toshiba Satellite A205 Power Adapter

Your operating system is corrupted, this can happen due to many reasons (ex:- bad installation). you need a repair operating system

No, it can't be replaced: it's part of the chipset and as such us soldered on the motherboard.

there may be a problem with ur power adaptor or ur battery charging section

Google is your friend

http://www.sparepartswarehouse.com/Toshiba,Satellite,A205,Laptop,System-Boards.aspx

Hi this is the manual

http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=DL&os=&category=&moid=1909174&rpn=PSAF3U&modelFilter=A205-S5804&selCategory=3&selFamily=1073768663

pls rate it fixya. tks

Once in a blue moon, the driver that works in Vista will work in XP. Try a forced install. You can also Google the model of the sound card (motherboard if the sound is integrated) and see if there is a XP driver that way. Good luck.