Please Help !!!!!!!!!!!!!!!!!!!

The TV's speakers are muted once a headphone is inserted.

Check its horizontal scan output transistor. Replace it with same number and check. If this transistor is faulty, this kind of fault can occur to most Panasonic TVs. If you wish to get some details, check this link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic / Timeslide / Flipcard, can be selected by the drop-down list, at the top left of the display window, will make surf easy. You can also do a search, by type in the brand name / model number / IC used, in the search box at the top right of the display window.

If you've plugged in a headphone socket to to it, pull it out.

unbalanced power supply, or damaged energy cable

Is it still under warranty?
If not I would find a good TV Service Shop and have them check out the power supply as there more than likely a 'Capacitor' much like a battery that is going bad.
Blessings,
A/V Media Guy

you mean with all tv channels too? there might be an attenuation setting somewhere that has to be de-activated. Check the manuals. hope this helps and pls come back for a feedback

there is no internal switch inside the tv to fix the problem. have you unplug the tv for 5 minute and see if it reset. if that don't work is in internal circuit sound board unit, sound is a bit difficult to diagnose and fix yourself, Any tv shop can fix the issue under 100 buck replacing the board, or you can bypass the sound by using RCA out put from tv than to an amp OR spend 50.00 and get a computer speakers that has an amprefier built into it and plug it in head phone from your tv and you can control the volume from computer speaker unit. My friend has the almost the same issue that the tv wont change channel by remote or from tv unit itself, so we use cable box and the remote to by pass the problem. I hope that help a bit..good luck!

THE MENU ,,YOU PROBLY TURNED INTERNAL SPEAKERS OFF,,

You can buy a replacement remote from one of the websites below:

PANASONIC TV REMOTE CONTROL


PANASONIC EUR511151C remote control


discount replacement Panasonic tv remote

check for the knub OSD on your remote to press it or at the menu select on screen display on