Where is the headphone jack? - Polyview V17E 17" LCD Flat Panel Monitor

When you plug in the headphones, the jack itself routes the signal away from the speakers. When you unplug the headphones, the jack has contacts that close again, routing signal to the speakers. If the jack contacts are dirty, they won't close correctly. I suspect were you to clean the contacts, you'd solve the problem.

This problem is common with a lot of MP3 players. It is caused by excessive movement of the headphone jack and causes the headphone jack has worked loose from the circuit board.
To fix this problem the MP3 player needs dismantling and the headphone jack needs resoldering onto the circuit board to get the headphone working properly.

What type of headphone connector do you have? The Yamaha keyboard headphone jack is a 3.5 mm stereo jack (like on a computer headphone jack). So if the headphones have a 1/4" plug, you need a 1/4" to 3.5 mm adapter.

I hope this helps.

Cindy Wells

check first you headphone jack speaker. if its working well, then the line from phone jack male to speaker continuity.

Buy a broken one with the headphone jack intact off Ebay and switch the jacks.

Go into the case and unplug the frount headphone jack to enable the rear, some motherboards are particular on this issue.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

I think you are on the right track, if the headphone jack is worn and shorting out itll kill the speakers because it thinks headphones are plgged in, ebay would be a good start for parts, maybe even call toshiba and speak to their tech support.

look at the headphone jack, if it has 3 band, it is a stereo jack. the computer is mono.
you need a 2 band jack.
if you look at the jack on the computer, you will see blue(left) and green (right). you canna try to use the green jack.
go to any electroic shop and get a stereo to mono converter.

Each of the rubber covered cords running to each ear piece has two fine strand wire bundles inside. The right ear piece has a red colored strand and a copper colored strand. The left ear piece has a green colored strand and a copper colored strand. The wires are coated with an insulation lacquer. The lacquer burns off when you heat the wire for soldering.

Repair item: 3.5 mm stereo headphone jack, shrink tubing

Plan for strain relief:. These headphone wires can't take any tension at all. You need to crimp the black cords to the headphone jack somehow.

Slide strain relief and headphone jack housing over the over the rubber covered headphone cord.

• You need to plan a way to relieve the pulling stress on the solder joints where the two headphone cords enter your replacement headphone jack.
• Try shrink tubing if you have it.
• If you have some thermal shrink tubing, slide a piece over the headphone cord end before stripping the wires.
• Slide the headphone jack casing over the headphone cord also.

Strip each headphone cord 5/8" using the 18 gage setting of your wire stripper..

Hold each headphone cord in a "third hand" soldering assist tool and tease the green, red and copper bundles apart..I wore a 10x Magnavisor and I used a sewing needle and a bright light.

Twist the copper colored strands from both headphone cords together. They are the common ground wires. The copper colored bundle will attach to the headphone jack ground.

Apply a dab of solder to the end of each of the three bundles of wire. You will see and smell the insulating lacquer as it burns off. Keep most of the wire bundle cool.

Position the two strand headphone cord and the 3.5 mm headphone jack in the third hand soldering stand.

• Plan where you can crimp the headphone cord. Crimp it when ready.
• The green == left channel wire goes to the tip of the 3.5mm jack.
• The red==right channel wire goes to the middle of the 3.5 mm jack
• The copper colored wires go to the ground of the jack..
• Measure resistance, 31 ohms per earpiece.
• Screw the jack cover on and finish the strain relief craftsmanship.
  

i used a cellphone adopter when my headphones broke.