Question about Dell Inspiron 9400 Notebook

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I have a Dell Inspiron 9400. I have took it apart and removed the motherboard so that I may replace the dc adapter with a new one. Can any one tell me how to do this the correct way without causing damage to the motherboard? I was told it may have to be soldered.

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Yes, the DC connector has to be soldered. The original one is probably still good. It just came loose from the laptop. Here is how to resolder it:

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

Click on this link or copy and paste the complete link into your browser.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response. Happy Holidays!

Thanks, Joe

Posted on Dec 28, 2010

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Charging light is flashing


There are two possible causes for this issue:
1) Your dell 9400 charger is malfunction
2) Your laptop dc power jack is loose or dead

Possible troubleshooting step:
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2) If the compatible dell 9400 charger won't work normally, the problem may lie in your dc power jack.

Hope this will help.

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You are right, most of the situations like this end up that the charging connector fixed / soldered to the motherboard get damaged because of shaking the connector when ever we connect and disconnect it .

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Hello.

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

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

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.

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It shows no power on your laptop but it shows you the dvd player led comes on then off. I would suggest try the following:
1. Remove laptop battery, optical drive, hard drive and ram. Remove external peripherals as well. 2. Make sure AC Adapter is not yet connected to the laptop. Press and hold on the laptop's power button for 10 seconds to drain the power flea. 3. Connect the AC Adapter to a known good power outlet, check AC Adapter power LED if it is on. Try to sense if AC Adapter is not making a bit of noise when it is plugin to the wall power outlet. 4. Connect now the AC Adapter to the laptop. Check if AC Adapter LED stays on when it is connected to the laptop. If the LED stays on means the AC Adapter is fine. If the AC Adapter LED turned off check the AC Adapter pin that goes to the laptop AC socket if it is loose. 5. If AC Adapter stays on after connecting to the laptop try to power on laptop. If no power LED comes on then this is motherboard problem. 6. Before replacing the motherboard there is one checking needs to do. If you can open your laptop bottom part then good, do this when laptop is not connected to any power source. Try to reseat the laptop CMOS battery then try to power on laptop after, if still fails then replace motherboard. I hope this helps.

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1 Answer

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Only A Couple Things You Can Try Here.....

You Can Attempt To Clear the BIOS By Removing The CMOS Battery...
You will have to disassemble to get to it...Not sure offhand on your exact model whether your battery is plugged into the motherboard or directly soldered.. I am almost certain yours is a Snap in/out that gets inserted into a carriage on your motherboard... Either Way... You Will Need to remove it... Make sure your Power Battery is also removed... and your AC Adapter is not plugged in..
Then Press and Hold Your Power On Button To SHort Out The Connection... THen After 30 seconds or so.... Reinsert CMOS Battery...
Reinsert Power Battery...Plug In AC Adapter...
Attempt To Power On


Didn't Work... Option 2:

Try Using A Backdoor Password Or Default Pass...Go To THe Following Link For More Info On It: http://www.tech-faq.com/reset-bios-password.shtml

Still Didn't Work... Option 3:

The BIOS Will Either Need To Be Flashed... Or You Will Need To Replace The Motherboard...

The BIOS ROM CHIP can be flashed (erased and written over) but it is costly... you Can Google Search That Information If You Choose To...
Use Search Term: Dell Inspiron Bios Flash

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