power supply

How To Repair A Power Supply In a Dell Laptop

When you need to repair the power supply in a Dell laptop, you need to reset the DC jack. In most cases, this is a repair when the laptop does not turn on when connected to the power outlet, but not when the battery is charged, or when you have intermittent power to the machine. If you constantly have to move the power connection on the back of the laptop, you need to replace the power supply.



Step 1:Unplug the laptop from the power outlet and disconnect any external devices or other cables from the laptop. Turn on the laptop, remove the battery and remove all the screws from the bottom of the laptop. Keep them in small paper cups, so you can easily replace them. Remove the plastic covers, RAM and the Wi-Fi card. Turn the computer off to the side and remove the CD / DVD device.


Step 2:Turn the laptop upside down but placed on the back of the machine towards you. Remove the screws from the plastic hinges with the flat wire of a precision screwdriver. Face the computer in front of you and open that on the screen in the far you will go. Pull the hinges of the plastic screen and plastic power button until the plate comes off. Consult your computer manual to make sure that the power plate for your model has been removed in this way. Some power plates do not require lifting the plastic hinges but only the plate above the keyboard.

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Step 3: Remove the screws that secure the keyboard and lift the keyboard from the top corners. Lift the data cable lever about 1mm. This lever does not release only lifts to unlock the data cable. Pull out the cable and remove the keyboard.


Step 4:Locate the bay on the side for the hard drive. It is a rectangular plastic cover on the side. Remove the screw holding the cover from under the laptop if you don’t already have it. Slide the hard drive out and set it aside.


Step 5: Remove the screws holding the hinges inside the laptop and disconnect the display connectors. Place the screen to the side. Straighten the bottom on all sides and remove any screws you find.


Step 6:Insert the edge of the plate of a precision screwdriver into the seam of the top and bottom plastic cover of the Bottom Assembly. Pry the plastics apart gently from a corner. You will feel the internal plastic clips begin to open. Disconnect the touchpad cable from the motherboard and set the upper plastic assembly away. Remove the screws that secure the processor heat sink. Set the heat sink aside. Remove the screws from the motherboard that hold it for the plastic bottom cover.


Step 7:Flip the laptop motherboard upside down onto the work surface with the DC jack in front of you. Add fresh new solder to all three contacts that hold the DC jack. This makes the old weld come loose and makes it easy to remove. As contact is heating, remove the solder using a desoldering pump. Do the same with the other two contacts. Remove as much welding as you can.


Step 8: Place your thumb and third finger on the jack and move back and forth to start the removal. It cannot come out the first time. Contact them again with the heat soldering iron and continue to move the socket until it comes off.


Step 9: Remove the old flow from the clamps using an alcohol brush. Gently brush the flow away from the terminals only.


Step 10: Replace the old DC power jack with a new one made for your Dell model. You can purchase these at the local computer store or in an online computer store like a geek, new egg or eBay (see Resources.)


Step 11:Place the new socket on a folded cloth on the table with the feet facing up. Flip the motherboard over the jack and allow the terminal jack to be inserted into the motherboard. The socket in this soldering way will ensure a good pin connection. Apply fresh solder to all power outlet terminals on this side of the motherboard. Flip the motherboard over and apply solder to this side of the terminals. Allow the solder to dry and return the motherboard to the correct position for the laptop. Screw the bottom plastic back on and replace all the other parts in the reverse order from which you took part.


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