Question about Acer Aspire 3680 Laptop

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Pin where power supply plugs in is shorted out imterinal I am trying to soldier a new one on the board

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  • PAAP SMITH Sep 27, 2009

    help

  • PAAP SMITH Sep 27, 2009

    THe PIN IN SIDE THE CASE IS BROKEN

  • Chris Hingee
    Chris Hingee May 11, 2010

    Please explain what type of help you require.

  • Chris Hingee
    Chris Hingee May 11, 2010

    Are you having a problem with the soldering?

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  • Master
  • 2,600 Answers

This can be a very difficult job, and you need to be very careful with the motherboard sleeves that hold the jack posts in place because they damage easily.

Posted on Sep 27, 2009

  • Chip
    Chip Sep 27, 2009

    Here is the service manual that has everything you need for disassembly, troubleshooting, etc.

    http://tim.id.au/laptops/acer/aspire%203...


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Sony KDL40EX500 power supply. Board has standby power but other voltages don't come up. Tried shorting "Power On" pin (pin 13) to "STDBY3.3V (pin 15) to try and get the board to power up but nothing.


If You do not see any open link or resistor, short IC or transistor on power supply it must be a control board problem. You must get the set to SONY, as it is necessary to exchange board and upgrade software.

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I have tried running 2 different M4A79 deluxe motherboards with a corsair 650W power supply, phenom I X4 processor, and an nVidia 9800GT video card but neither of them will so much as turn on with...


It sounds like the ATX power supply is not getting turned on by the motherboard.
In order for this to happen, pin 14 (PS_ON*) of the 20-pin ATX power plug from the power supply must be pulled to ground. You can test this by plugging the power supply in to AC power without it plugged in to the motherboard.

Using a paper clip, short pin 14 (PS_ON*) to pin 15 (ground) and the power supply should turn ON.

Looking at the front of the 20-pin plug, with the latch on the top, pin 14 is the 4th from the left
__
_________________' '________________
' 11 ' 12 ' 13 ' 14 ' 15 ' 16 ' 17 ' 18 ' 19 ' 20 '
'--------------------------------------------------------------'
' 1 ' 2 ' 3 ' 4 ' 5 ' 6 ' 7 ' 8 ' 9 ' 10 '
---------------------------------------------------------------
Front of 20-pin ATX Power Connector

If you can turn on the power supply by shorting pin 14 to ground, but it doesn't happen when plugged into the motherboard, there is most likely a jumper setting on the motherboard which has not been configured correctly.

I hope this helps!

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Removed power cord from back of pc and after plugging it back in I suddenly had no power. Replaced original power supply (Bestec 300 W 24 pin main connector) with a new Dynex 400W 20+4 pin and still...


Before calling it quits on the motherboard, try disconnecting ALL non-essential devices from the motherboard.

This includes drive cables, all slot mounted cards, etc.

Leave the processor and ram in place. Make sure ALL power cords from the power supply to the motherboard are properly plugged in. Some power supplies have 2 cords to the motherboard, a large plug and possibly a separate 4 pin that plugs in near the CPU. After checking your plugs, see if the board will power up. If so, you should get some beeps or status lights. If not, then it is likely the board has failed. Since you have replaced the original power supply, (assuming the replacement is compatible), it is not likely you have 2 bad power supplies.

If the board DOES power up, then plug in 1 internal device at a time to determine what might be "killing" the boot. A bad hard drive or DVD/CD drive can cause this as well as a shorted USB or firewire device.

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How do I replace a power supply on a Compaq Presario SR5110NX Desktop PC


you can purchase a power supply from any computer store *********** board supports both standard IDE and Serial ATA connections, so you want a power supply that does SATA power as well. Unplug the power cord from the back of the computer. remove the cover from the case and verify that there is no green LED on the board that is lit up (if there is, there is still power on the board). unplug all connections from the current power supply, including all drive power and the large 24pin plug (actually a 4 pin plug that is combined with a 20 pin plug) on the board, then unplug the 4 pin plug near the processor. careful that the 24 pin plug and the additional 4 pin plug near the processor have latches on the side. Remove the 4 screws that hold the power supply in and remove the power supply, install new supply and reinstall the 4 screws. first plug in the 4 pin plug that connects with the 20 pin, the 4 pin plug has no latch, it is held in place by the 20 pin plug. then plug in the 20 pin plug and the 4 pin next to the processor. then plug in the drive power to all of the drives. Install the power plug at the back of the system and you should see a green LED on the board when you insert the power. replace the cover and power the system up.

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I believe there is a short in my Antec power supply. Without plugging in the computer, how do I "test"? Do I try another power supply externally, bypassing the illedged "shorted"/bad supply?


If you have another supply around, you can remove the connections from the M/B ( 20 or 24 pin ) and a 4 pin 12 v connector. unplug the peripherals if you want. Carefully plug the new 20 or 24 pin conn from new supply into M/B and the 4 pin 12 v.If fans spin and there's no smell...sucess remove old and plug in new.

Mar 23, 2010 | Computers & Internet

2 Answers

Wont start


If you see the red LED then the Power supply is ok. Sounds like there is an issue with the Motherboard, Either a cable got disconnected, or a bad board.

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1 Answer

Does anyone know which connector to plug into on power supply


Double check all the connections from the AC line and from the power supply to the other circuit boards. The connectors you are mentioning are identical as per the picture below.
If you need a new power supply, you can find one from this link.


be4d37f.jpg

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NEW BIOSTAR MOTHERBOARD DOES NOT BOOT


Good day sir, let try to test first the power supply, Unplug the power cord, remove the 20 pin (24 pin for the late model) molex power connector from the motherboard, plug in the power cord, get a 2 to 4 inch jumper wire, short the green wire with any of the red or black wire on the molex 20 pin power plug, the result maybe the following:
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  2. you will see the fan turn for a few second then stops. you power supply is selective, and may require a different type of motherboard. Get a new one.
  3. you wont see the fan turn at all. get a new one.
If in case you are with #1. uinplug the power cord and remove all the expansion cards, data cables from the hard disk and cd drives. we are trying to isolate the problem. make sure that the only connected cables on the motherboard are as follows:
  1. 20 pin power cable.
  2. 4 pin 12 volt power cable (if applicable)
  3. speaker
  4. power switch
  5. power led
Test the pc once more. plug in the PC. If still the board wont power on. problem with your motherboard. Note:make sure your RAM is good. Hope this helps.

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1 Answer

4 pin plug 12volt on the motherboard.


pls you have to identify which area is short circuit, there for remove the 4 pin plug and power on. of power on ,it is telling your cpu section (VRM Circuit is short) it may faulty cap or transistor , bit I found more than 80% is shorted north bridge.
it was not fixed. but you have to test all coils to identify which section mos fets are short, remove the cpu to isolate north bridge , check vrm circuit,
images?q=tbn:and9gctvnhhmvqm60iuldruuri-bndxickpzhgxm7juwfsizc3gdj9_-4a

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1 Answer

Power supply


I believe you're talking about the DC jack on the computer, if so, then you can find one on Ebay at a very cheap price, around $3. To install this you will need to disassemble the machine down to the motherboard. The jack is soldiered to the board. Once you get the board out you will be able to see the soldiered connections. You'll need a soldiering iron and soldier, remove the old and resoldier the new. Here's a couple of links with breakdown diagrams for various machines, you may be able to find one for your machine.
http://fileshare.eshop.bg/index.php?what=search2

http://www.eserviceinfo.com/service_manual/datasheets_d_600.html

http://repair4laptop.org/notebook.html

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