Coby LED TV2326 - No Power

[ltaylor728]

Hello,

My first time doing this...My Coby LED TV2326 will not power on, no stand by, no clicking, nothing. I took the power supply board to a tv repair guy who tested it and said nothing was wrong with it, that it must be something else, and that I should stop wasting my time and buy another tv. The frugality in me figures I've nothing to loose by still trying to fix it.

I've attached various angled views of the motherboard (part no. 002-FV24-2510-00R). There are lots of questionable yellowish-brownish ooze. Not sure if I should replace.

Please save me someone!

[budm]

Re: Coby LED TV2326 - No Power

Please upload the pictures of the whole back side of the TV so we can see how all the boards are connected together, and also good whole pictures of the power supply board top side and bottom side of the board.
BTW, those yellowish stuff are bad brown glue that will become corrosive and conductive.
Did you check the voltage outputs of the power supply board to see what it is putting out?

[ltaylor728]

Re: Coby LED TV2326 - No Power

Here are more pics.

Don't know about voltage output (sorry). TV repair guy checked voltage ouput on various components on the power supply, but not sure exactly what, just know he said nothing was wrong with it.

[budm]

Re: Coby LED TV2326 - No Power

So do you have digital meter, soldering iron, etc.?

[ltaylor728]

Re: Coby LED TV2326 - No Power

No tools, but getting what i need is no problem.

[budm]

Re: Coby LED TV2326 - No Power

You will need at least a digital multimeter.

[ltaylor728]

Re: Coby LED TV2326 - No Power

I got the meter!

[tom66]

Re: Coby LED TV2326 - No Power

OK, do you know how to use it?

See this photo:
https://www.badcaps.net/forum/attach...2&d=1413991468

Check the power outputs on the power supply, with everything connected. You should get some output voltages on the pins marked 12V and 5V. Careful, as the set will have to be live and plugged in while you do this... don't touch anything on the power board with your hands.

To test: set your meter to 20V DC, put the black probe on a pin marked GND, and the red probe on the other pins one after another, noting voltages and the label they correspond to. Please present results like so:

12V - 11.98
ON/OFF - 3V
GND - 0V
... (etc)

[ltaylor728]

Re: Coby LED TV2326 - No Power

The results:

PIN1.4.5:GND
PIN2:ADJ - "5.03"
PIN3:ENA - no reading
PIN6:7.5v - "5.23"
PIN8.9:12v - "12.5", "12.66"

Sorry for late reply, I've been very ill.

[budm]

Re: Coby LED TV2326 - No Power

"PIN3:ENA - no reading" OK, the main board is not sending the Enable signal.

[ltaylor728]

Re: Coby LED TV2326 - No Power

What does that mean?

[budm]

Re: Coby LED TV2326 - No Power

It means the power supply board is OK, but the main board is not OK.

[ltaylor728]

Re: Coby LED TV2326 - No Power

Should I try replacing it or is there further testing I can do?

[budm]

Re: Coby LED TV2326 - No Power

For 23" TV? If it is less than $30 then it may be worth it.
You can check the voltages of the regulator ICs.

[ltaylor728]

Re: Coby LED TV2326 - No Power

I'll look into it, thank you!

[ltaylor728]

Re: Coby LED TV2326 - No Power

Need help, I replaced the main board and hooked everything back up; maybe i did something wrong; all i get is a white screen, no sound, PLEASE HELP

[tom66]

Re: Coby LED TV2326 - No Power

Check the LVDS cable is connected, it's the cable between the main board and T-con board.

[ltaylor728]

Re: Coby LED TV2326 - No Power

This cable? It kept coming out.

[tom66]

Re: Coby LED TV2326 - No Power

There's a little black plastic latch on that connector. Usually you have to lift or slide that latch (be *VERY* careful, as they are delicate) to get the connector in properly.