Question about Gateway MX3228 Notebook

1 Answer

Lost a Cap, MX3228

When I de-soldered the power jack from the little PCB, capacitor C2 fell off. I am going to pick one up tomorrow, but I have no idea what the capacitance is. I can remeber the size since I can look at the pads on the PCB, but I don't want to put the wrong in. I phoned tech support, but they would want to charge me for their help. If someone knows where I can find a schematicn for my gateway laptop, model # MX3228, I would be most appreciative

Posted by on

  • jozef_de_bee Dec 30, 2008

    Hi Geekman:



    Thanks, but the cap in question is a tiny suface mounted block shaped thing. Although I lost the cap, I did find it, so the cap is no longer missing. There is no writing on the cap that is visible to the naked eye. I have trouble-shot many PCB's in my life, however, never a mother board. In my experience once the block shaped cap is under a certain size there is no polarization. It is close to the power source and probably runs to ground in parallel, but I cannot see the trace or have not seen a schematic so there is no way to be sure. There is two other caps that are right beside them so I would assume the same. One is about three times larger. The lost cap in question is about as thick of two of the lines one my thumb (that you would see in a fingerprint) and three of those same lines long. I don't own calipers, so I can't give an exact measurement. I know that the tolerance on most caps is the sh**'s, by about 50% and ohming the pads it lay on out it reads as an open so, I am fine to leave it. My computer still malfucntions all the same, since the charging is intermittent, a component in the power circuit must be loose, the batter seems to run the computer fine and it will charge after about two days. Thanks for your input, your feed back tells me that I should have explained myself better to begin with. I have never asked for tech help online before.



    I don't have a temperature control dial on my soldering iron, so I will just save up for a new computer in a couple of months.



    Cheers,



    Jozef

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Gateway Master
  • 32,281 Answers

The capacitor is most likely an electrolytic type, these are a round cyclinder device and they are polarised. From its location near the power jack it is most lkely more than 50uF and more than 20V. The information on the capactance and voltage of the capacitor is printed on the capacitor. If you are going to purchase a new one, make sure you get an exact replacement because if it is bigger in value eg. microfarad and voltage it will be too big to fit on the motherbard and if it is a lesser value, it will fail and not perform as required.
The capacitor is polarised eg + & - legs on the capacitor and these must be soldered in the correct direction on the motherboard, the white stripe on the capacitor marks the negative lead of the capacitor.
If the capacitor fell off during de-soldering of the power jack, you must have applied too much heat for this capacitor to fall off. If the capacitor is not damaged you could solder it back on the motherboard.
You should be using a temoerature controlled soldering iron, applying excessive heat to a motherboard can damage the motherboard as these boards are multilayer boards, there are circuit tracks on top, below and in the middle of the board. make sure you don't put solder across printed circuit tracks, carefully check the motherboard under a magnifying glass.


Posted on Dec 29, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Acer aspire one charging port loose


If I recall this model line uses a fixed DC power jack directly soldered to the main board. When they become loose, you can visually inspect the jack itself (without the cord plugged in), and use a pen or probe to see of the center peg is excessively loose. The common result is the solder connections have been broken between the DC jack and the main board. Often the jack itself needs to be replaced (involving complete disassemble, de-soldering old jack, cleaning, repair PCB if needed, and re-solder new jack in place.
TIP - if it is not charging, remove battery, and gently put pressure from different angles with the power cord plugged in, and try to turn it on. If it turns on with pressure from a specific angle, it would indicate the DC jack is indeed loose, and likely needs to be replaced. It works becomes the pressure is making the electrical contact that has other wise been broken. ALSO, if it turns on easily, yet losses power at certain angles, its a similar issue.
TIP2 - If it still indeed charges regardless of the angle, and does not lose power, it may be a "Modular" DC jack, meaning the jack connects to the main board through a wire harness, and is less prone to breaking the electrical contacts, and the jack is simply loose inside it's retaining clips/slides. Minor disassembly and hot glue are quick fixes for this since usually the plastic clip/slide in the chassis have broke.

GOOD LUCK! :)

Dec 06, 2013 | Acer Aspire One PC Notebook

1 Answer

Laptop no power


Check the output of the AC adapter (Charger), or skip to check the DC Power Jack, first.

A) DC Power Jack:
The jack on the laptop that the AC adapter (Charger) plugs into.

IF, this is in reference to an HP Pavilion dv2000z series of Notebook PC, this is what the jack looks like not installed,

http://www.dcpowerjacks.net/catalog/index.php?main_page=product_info&products_id=1051

In the views of the jack, the pins and blade are on the Bottom of the jack.
They go down through the motherboard, and are soldered in place.

http://www.aaroncake.net/electronics/solder.htm

Scroll down to Step 5, and observe the Solder Joints.

IF, a solder joint, (Or more than one), is cracked, the DC Power jack will Not flow power to the laptop.

ALL power removed (AC adapter and Battery) see if you can gently wiggle the Center Pin, of the DC Power Jack. Using a non-metallic object is preferred.

See if the entire jack seems to move around.

ANY perceptible movement means a bad DC Power Jack, or solder joint/s.
Laptop is to be completely disassembled, down to the BARE motherboard in your hand. (No Processor, no Ram Memory, Nada )

This is a basic guide to DC Power Jack replacement,

http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/

A) You can use a 25 Watt soldering iron, with a No.2 chisel tip.
Keep a damp sponge handy, if you do not have one in a soldering iron stand. Keep the tip CLEAN, and well tinned, at all times.

B) Use Desoldering Braid. (Solder Wick)
Works MUCH better than a Desoldering Tool. (Solder S-ucker Tool)

Unroll a small length. Flatten out a small length, around 2 inches long.
Lay enough of the tip of the Desoldering Braid, across the solder joint to cover it. Then lay the tip of the soldering iron on top of the braid.

Once the braid, AND solder heat up enough, the fine twisted wires of the Desoldering Braid will pick up some solder.

GO S-L-O-W.

If you overheat the solder joint, the copper circuit trace area under it, can lift right off of the motherboard. Bad times are ahead.

If you overheat the solder joint, the copper circuit trace area under the solder joint, can lose it's tinning, and CANNOT be re-tinned again.
Bad times ahead.

As soon as the solder starts to melt, and you see the braid has picked up some, remove the solder iron, and braid.
Allow the motherboard circuit trace area to cool down.

Then begin again with a fresh new piece of Desoldering Braid.
Cut the solder soaked section off.

Keep going back, until you have removed all of the excess solder that you can.
(Make take a few times, or more, to perform this, and allow the circuit trace area to cool down in-between )

There will be a skin coat of solder left behind. As you heat one of the pins, or the blade, pull up on the jack.

The pin, or blade, will partially come out. It will not come all the way out because of the other pins, or blade, is still soldered in.

Go to the next pin/blade, and heat it up. Pull. The pins, and blade will come out of the motherboard a little further.
Allow the circuit trace area to cool down in-between heating each pin, or the blade.

Keep going around until the jack is free.
You might have a skin coat going across the circuit trace hole.
That's OK, leave it.

When the new jack is installed, the pins, or blade goes against this skin coat. When the soldering iron touches the skin, the pins, or blade, will poke through.

Make GOOD, shiny bright solder joints. A dull, cold solder joint, will have you scratching your head.

B) If the DC Power Jack proves to be good, with the simple test of the device to see if it will wiggle, go to the AC adapter. (Charger)

The Center Hole in the plug that plugs into the DC Power Jack, is Positive. The outer cylindrical metal shell is Negative.

Positive (Red) probe lead to Center Hole, Negative (Black) probe lead to outside cylindrical metal shell.

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

You should be reading VERY close to 18.5 Volts.

Also have an assistant wiggle the Power Cord, and the cable from the adapter unit, TO the laptop.

An intermittent reading indicates a broken wire.

DC Power Jack, and AC adapter check out, the problem is the power controller chipset.

Chip and Chipset are slang terms for I.C.
Integrated Circuit,

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

The power controller chipset is a power MOSFET.
Here are two examples used in a Lot of laptops,

1) http://html.alldatasheet.com/html-pdf/85156/VISHAY/SI4925BDY/183/1/SI4925BDY.html


2) 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

When bad, generally the power controller chipset will burn up, and blacken.

Note that in both examples above, that the chipsets are in a D2PAK surface mount design.

The J leads are easy to unsolder, and solder.

Feb 17, 2012 | HP Pavilion dv2000z Notebook

1 Answer

Mijn batterij knippert rood de batterijtest branden eerst 3 ledjes knipperen en daarna alle ledjes constant, is de batterij nu goed of slecht en start daarom de laptop niet op ?


Hello.

The most common reasons are the battery, power adapter/cord and power jack.

If you move/wiggle the power adapter at the point where it connects to the laptop, and the power goes off and on, the power jack is the problem.

The power jack is inside the laptop and either needs soldering or replacement.

If no change, the power adapter is probably faulty and needs replacement.

Also, power off and remove the battery. If the laptop powers on with just the adapter connected, your battery is faulty.

Hope this helps.

Jan 01, 2011 | Dell Latitude D610 Notebook

1 Answer

I have a HP dv7-1240us. My power supply went bad. I purchased a new one now my cpu doesnt charge or even power up. Need some help on how to replace the power socket. I have no idea on what else it could...


Was the new one that you purchased from HP? If so, then did the model numbers of the old one match the new one you bought? If the new one isn't an HP power supply, then that could be the reason why it won't charge your battery. Some of the "after market" power supplies will be enough to run the computer, but they aren't all able to charge the battery. It could also be the DC Jack on the motherboard that has gone bad. If you are not familiar with de-soldering a component from a motherboard, then you may want to think twice before attempting it. You will have to get the exact jack that goes to your motherboard, de-solder the old jack, & solder in the new one. Trust me, de-soldering and removing an old jack isn't always as easy as it sounds. You will have to completely disassemble your laptop to do that too, so be sure to keep track of all the little screws and which screws go where. Check out Madhatter Computers on Facebook, or go to the website: www.madhattercomputers.com.

Jul 20, 2010 | HP Pavilion dv7-1240us Notebook

2 Answers

How to replace dc power jack for toshiba p15


Take apart laptop and see what type of jack is on your system. There are two types. one is soldered on and the other is a module that connects to the motherboard with a wire connector.

If you have a soldered on type the you will need to de-solder it from the board then solder a new one onto the board. most ac jack issue just need to resolder it unless the jack itself is broken.

May 19, 2010 | Toshiba Satellite P15-S420 Notebook

1 Answer

Doesn't run on ac power


That typically happens because the Fuses, they look like, zero ohm surface mount resistors, close by the power input jack, somewhere usually, have "Blown". Or sometimes it is the actual "Switch" inside the actual power jack, that some have, other times it can be the "Sensing" IC that "Sees" the battery, and "Talks" to the chip in the battery. and routes the power to the PC, battery or both. Use a meter and check for open circuits. Also look for cracks in the PCB traces by the jack, sometimes movement of said jack fractures the solder and that cause problems, sometimes just re-sweating the solder, on all the connections on the jack, again works wonders too. GL

Feb 25, 2010 | Acer Extensa 5420-5687 Notebook

1 Answer

I have a gateway 3250GZ laptop, the DC in jack


http://forums.whatthetech.com/DC_Jack_Laptop_t105164.html

double check your power cord! i just went thru 3 days of troubleshooting my Gateway M6318. Thought it was my dc jack.... after tearing down my laptop... finding the jack in tact, soldering in tact. testing my power cord... off and on for 3 days.. it was reading 19v.. which is what it should... but as of today began zero reading on tester. Tomorrow I will buy a new power cord to see if this was the correct problem... wish i would have found the above reference site before all the other troubleshooting i had done... tearing down my lap top, pulling, tugging, twisting my power cord to get a good charge.... etc. hope this helps!

Jul 12, 2009 | Gateway MX3228 Notebook

1 Answer

Opening Gateway MX3228


Ok here is instructions on removing to get to the motherboard. It is for a different laptop but removal is exactly the same.
http://www.irisvista.com/tech/laptops/ToshibaA75/satA75_1.htm

Feb 06, 2009 | Gateway MX3228 Notebook

2 Answers

Worn power connection


Well, if it's just the soldering points that are weaking then you don't need a new one. Just resolder those points (probably won't even take any extra solder but i would recommend giving it a little more so it doesn't just break again) and you should be fine. If the actual jack is damaged then you'll have to replace it. No real ease here, though, as you'll have to take the laptop apart either way.

May 20, 2008 | Dell Inspiron B130 Notebook

1 Answer

Disappearing Screen


ya thats not good sighn its bad power chip on mobo replace your mobo or solder in new chips or just sell it for parts on ebay

Jan 24, 2008 | Gateway MX3228 Notebook

Not finding what you are looking for?
PC Laptops Logo

Related Topics:

69 people viewed this question

Ask a Question

Usually answered in minutes!

Top Gateway PC Laptops Experts

Mark Taylor
Mark Taylor

Level 3 Expert

728 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1128 Answers

Are you a Gateway PC Laptop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...