By far the most common piece of hardware on any laptop is the DC Jack of the plug (that accepts power on the laptop). There are several reasons for the high failure rate but the two most common are poor handling and poor design. I would say more than 90% of these DC jacks are soldered directly on the motherboard.
Every day wears abuse plugging and unplugging the AC power source, the solder joints on the motherboard. Here are the twomost common symptoms for this damage:
- Laptop will not accept external AC power. Constantly the battery remains until the battery dies.
- You have moved to keep the cord until it starts accepting external power.
The first thing you need to do is eliminate the cord / power supply as a source of problems. The power supply is the box to the right on the cord. Some power supplies have an indicator light to show when they are plugged in. If the light then it will work is not the power supply. If the adapter does not have the ad received a voltmeter, plug the cable into the wall and laptop to check with a voltmeter the end that goes to the laptop. Insert lead into the hole and place the second lead on the outside. Make sure your meter is read-volts DC. Well, if you have a reading, is a function of the laptop somewhere between 14 to 19 volts then your> Power supply is good and the damage is on the DC jack on the laptop motherboard.
Repairing the DC jack on any laptop is a major repair. If you're not comfortable doing it to please a person who qualified for the job. This repair will require dismantling the entire laptop and removing the motherboard. Please read the following article, what measures are being taken to ensure the proper care when disassembling a notebook: notebook repair.
Once youfull access to the DC Jack you see the pins to get the soldered onto the motherboard. To the naked eye it would look like nothing's wrong with them, but a slight break in the solder will cause these problems. You need a soldering iron with a very fine tip. The fine tip is to avoid damage to neighboring components. Apply the solder on each pin to ensure that the solder evenly distributed. The solder should have a dull look when you're done.
After soldering all the pins,Re-assemble the laptop and run it to test. To avoid this damage in the future to take extra care when inserting and removing the external power cord. Hope this helps!
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