Earphone jack problem

My son has a HP DV4 laptop computer with a damaged earphone jack.  In order to hear, he has to hold the plug up against the jack.

I think replacing this jack will require major surgery, in that the whole machine has to be disassembled to get at the jack.

I had until recently a desktop computer where I could assign functions to the various jacks, such that they could either be inputs or outputs.  I wonder if there is a way to reprogram the mic jack  to be the headphone jack, because it is still in good condition.

Does anybody know how this might be achieved?

Charlie WestonAsked:
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Another easy option would be to buy an external USB soundcard.  Search for that on EBay and you'll find options for a couple of dollars.  They have nice ones with 5.1 surround etc, and they are fairly small and portable.
Norm DickinsonGuruCommented:
That ability is a function of the chipset and audio driver and is not likely going to be available for that laptop.

However, the jack replacement shouldn't be all that tough - those laptops generally come apart around the keyboard bezel and from removing screws on the bottom panel. It may not be your cup of tea, but as laptop repairs go, it is a lot easier than say changing the LCD.

Step by step instructions, warnings, diagrams, etc. can be found right online in the service manual for that model at the following location:

I found the part you will need on page 102 (110 OF 196)

If you don't feel like taking the cover off, any local repair shop could do it for you.

Audio board (includes audio connectors, infrared lens, and audio board cable) 486840-001
Before removing the audio board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
4. Remove the battery (see Battery on page 55).
5. Remove the following components:
a. Hard drive (see Hard drive on page 59)
b. WLAN cover (see WLAN module on page 62)
c. Optical drive (see Optical drive on page 57)
d. Keyboard (see Keyboard on page 72)
e. Keyboard cover (see Keyboard cover on page 74)
f. Display assembly (see Display assembly on page 80)
g. Top cover (see Top cover on page 92)
Remove the audio board:
1. Disconnect the audio board cable (1) from the system board, and remove the cable from the audio
board (2).
2. Remove the two Phillips PM2.5×4.0 screws (3) that secure the audio board to the computer.
Component replacement
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