My Panasonic Viera has no power. Will not turn on.
My Panasonic Viera won't turn on. There are no blinking lights. Nothing. It is dead.
Check the power outlet to make sure your tv is getting power , If you have power try a hard reset . Pull the plug and with the power disconnected hold the power button on for 60 seconds. After at least the 60 seconds plug the tv in and try to start it. If it works great if not , hold the power button in the on position for a count of 20 with the tv plugged in . If theres still no Joy try power with one of your volume buttons at the same time . One of these should provide a hard reset for the tv. Hope this helps
My problem was the filter just inside where the power cord plugs in, Something in the filter blew and the connection for one of the plug leads was open electrically. I got one off ebay and have been watching it since.
Hi @K Rollin,
It seems as though you may have two problems.
Remote control unit.
If possible try the test again using another known working IR remote control unit i.e. one that has an IR LED bulb at one end of the unit and check if you can detect the IR bulb turning on when you press any button, when looking at the bulb in the camera’s LCD screen. This is just to prove that you’re doing the test properly ;-)
Also make sure that you try other “less used” buttons rather than the most used ones i.e. the Power, Vol.Up/Dn, CH Up/Dn are the most commonly used and the button’s contact surface can wear out.
If the TV remote still doesn’t work it will have to be opened an inspected. It may be that it is something simple like a broken connection from the battery connectors to the circuit board etc.
If there are no screws holding the remote case together (check in battery compartment and also under any labels for recessed screws) then the case may just be held together with plastic snap clips. Use an old credit card to start prying open the case. Start where the IR LED is, if it protrudes from the middle of the “seam” as you have a bit of an opening there or try near a corner etc.
Here’s an image taken from the service manual for the TV showing the No Power Troubleshooting flowchart which is a good place to start
(click on image to enlarge for better viewing)
You will need a DMM (digital multimeter) and know how to use it to test if the fuses on the P board are OK.
Use the DMM’s Ohmmeter function to test if the fuses are OK. Do this with the power totally disconnected from the TV. The schematic of the P board is to be found on p.81 of the manual.
Also use the Ohmmeter to test the continuity of all the wires in the power cord from the pins in the plug to the other end of the cable in case it is a fractured cord.
I’m not experienced in TV set repair, but the inbuilt power supply might have a dead cap (capacitor), or even the mainboard or control board (assuming that’s what the name for the board with the buttons is) could be shorted and therefore dead. Myself, I would worry about the old school electrolytic capacitors that to the bulk of the power switching. those would blow (and i mean blow and stink) first. Just my thoughts.
I have 2 Viera's. Both developed bad capacitors. You can tell by looking at the tops. They MUST be FLAT or CONCAVE. Any bulge means they need to be replaced. You can also feel and slight bulge with your fingers.
I am talking about the very large capacitors on the P board.
Check the two 10 ampere fuses at the bottom of the power board where the mains filter plugs into. They are the multi striped units about 1/2" long that snap into the chassis. There is a fuse for both sides of the mains (hot and neutral) Check the fuses for continuity with an ohm meter. Should read .1 ohm or less. Replaced one of the fuses (read open on the meter) and the set came back to life.
Panasonic viera th 17lx8w tv power supply repair
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