Posted 07 December 2010 - 12:46 PM
Hello KB02K and welcome to Bleepingcomputer.
This sounds to me like your jack connections are either not making direct contact with the plug or there is a possible oxidation built up on the connections.
One of the biggest problems with jacks like these is that over time, when the head phone or microphone plugs are plugged in and un-plugged over and over again, or if the wire is pulled on repeatedly do to a person attempting to go beyond the wires length, it causes stress on both the wires going into the plug and the connections inside the jack its self.
If the plug on the microphone or headset is Okay, then the problem would be inside this jack.
This repair would involve opening the laptop and disassembling it to gain access to the jack from the inside.
The connections at this point can be checked on the circuit board to see if the soldered lugs have become isolated from the circuit trace on the circuit board.
If it is loose, this lug would have to be re-soldered to the circuit trace using a soldering pencil and molten solder.
If the problem is inside the jack its self, the jack would either have to be replaced with a new one or it would have to be carefully be taken apart (which is not easy to do without possible damage) and the connections cleaned and or corrected to make full contact with the plug to which is plugged into it.
If you have no experience with electronics repair, I suggest you have this laptop repaired professionally.
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