Panasonic Plasma TC-P42S30 Not Turning On

[TVS]

My Panasonic Plasma TV is not turning on.

The Model Number:
TC-P42S30


Symptoms:

Not turning on

Constant clicking sounds when the TV is plugged in. (The sound of a TV turning on and off again) About 15 second delay between the clicks

When i try to reset the TV by holding down the power button for 10 seconds and then let go and press the power button one more time the red led light turns on but it doesnt blink. It just stays on. Also when i do this the lights on the board of the TV turn on too but only for about 5 seconds they dont stay on.

I checked for blown capacitors and didnt see any

I used a multimeter and checked the power coming in and it was 120 volts which seems normal but idk.

[TVS]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Can anyone help?

[freakaftr8]

Re: Panasonic Plasma TC-P42S30 Not Turning On

First some preliminary checks. On the far right and left side are sustain boards. Unplug both from power supply. Plug in the tv and power up. Still clicking? Look for a solid red light on the front of the tv.

[Ltank]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Remove ac power then rear cover. Visually inspect to loose cables, blown caps or other parts. Then apply ac power using a DVM measure the PS voltages. There will be a sticker on rear of pannel with voltage levels Va and Vs. should be close to what is labeled. If not then; Remove power then disconnect cable from PS to the SC board (big board on left side of set as looking at it from the rear) apply power and recheck voltages? Does it still click? If same then repeat proceedure for the SS board (big board on right of set as looking at it from the rear). This is the basic starting point.

[TVS]

Re: Panasonic Plasma TC-P42S30 Not Turning On

First some preliminary checks. On the far right and left side are sustain boards. Unplug both from power supply. Plug in the tv and power up. Still clicking? Look for a solid red light on the front of the tv.

I did this, i still have the clicking sound of the tv turning on and off.


Also i was checking the fuses on my power supply board and one of the fuses on the bottom is not giving a reading while all the others are. It like a cylinder its white with a pink stripe at the middle. Is this normal or is there a problem?

[vinceroger69]

Re: Panasonic Plasma TC-P42S30 Not Turning On

are you checking the fuse for voltage each side or testing it with the set of on ohms setting on multi meter across the fuse.

[TVS]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Its on v~ on the multimeter i put one of the pin on a ground screw and one on the side of the fuse

[vinceroger69]

Re: Panasonic Plasma TC-P42S30 Not Turning On

so your not getting no voltage to either side then?

[TVS]

Re: Panasonic Plasma TC-P42S30 Not Turning On

so your not getting no voltage to either side then?

Yes i just checked both sides of the fuse and its 0.00

[vinceroger69]

Re: Panasonic Plasma TC-P42S30 Not Turning On

im sure tom will be along with advice on test that fuse may only get power when the relay stays energised.

[tom66]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Would try checking fuse on ohms instead - testing voltage at fuse points can give unreliable results.

* Unplug power board & all power to set.
* Leave for 5 minutes to discharge X-caps.
* Check on the 200 ohm range of your multimeter ACROSS the fuse, you should get a reading around 0.0 to 3.0 ohms. Note a single "1" without a zero digit indicates the fuse is blown.

[TVS]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Would try checking fuse on ohms instead - testing voltage at fuse points can give unreliable results.

* Unplug power board & all power to set.
* Leave for 5 minutes to discharge X-caps.
* Check on the 200 ohm range of your multimeter ACROSS the fuse, you should get a reading around 0.0 to 3.0 ohms. Note a single "1" without a zero digit indicates the fuse is blown.

Okay i did this and i got 0.01 on the fuse. So i guess its working and the problem is else where?

[tom66]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Yes -- next step we will need a picture of your power board.

[TVS]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Images of my power board:

http://imgur.com/a/LBBEk

Thanks for the help

[tom66]

Re: Panasonic Plasma TC-P42S30 Not Turning On

OK, on the brown and white connector loom, bottom right, there's some labels next to the connector, can you list these or get a picture of them? (the larger ~12 pin one and the 4 pin one.)
http://i.imgur.com/q7XXXa2.jpg

[TVS]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Okay i took some more pictures:

http://imgur.com/a/eAXye

[tom66]

Re: Panasonic Plasma TC-P42S30 Not Turning On

So, what voltages do you measure on pins STBY5V and STBY5V-ON?

To measure:
- TV is plugged in and switch turned on, any main on/off switch which would enable the standby light normally is to engaged (like a main power switch somewhere...)
- Multimeter set to 20V DC.
- Black probe of multimeter on the metal chassis, a convenient place is a screw hole point for the wall mount, as long as it is connected to the back metal plate that everything is mounted to.
- Red probe touching the metal sheath around where wire meets pin for each pin indicated.
- Note reading after 3 seconds and report results.

[TVS]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Stb5v: 10

stb5v-on: 0.00

[tom66]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Check your meter is set to volts DC, not volts AC. If the reading is still 10V, exchange your meter's battery for a fresh one.

[TVS]

Re: Panasonic Plasma TC-P42S30 Not Turning On

Check your meter is set to volts DC, not volts AC. If the reading is still 10V, exchange your meter's battery for a fresh one.

Yup it was in DC, i checked again but this time i got 5V and 0.00 again for the other one.