Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flickr.

[guyonphone]

I have a Sceptre X32GV-Komodo, When I turn on the TV it comes on, shows the Sceptre Logo (The logo has a light flicker) then it will power off, It will not turn back on again, unless I unplug it and then plug it back in and it will repeat the process, I did a visual inspection of the capacitors, and I saw three that were bad.

I bought this kit from LCD Alternatives and replaced all the caps on the power supply board, except the monster one, however this did not resolve the problem.

Does anyone have any ideas on what may be the problem?

Thank You

[guyonphone]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Hello Everyone,

I examined the TV further and upon startup, I noticed that the LCD power light and the backlight appear to flicker at the same time. Then the TV powers off, including the LCD light. I tried the flashlight test to confirm and do not see an image. So I don't think the issue is with the CCFL's, I looked at the playlist from the repair guides and found this video do you think this is a voltage regulator issue?

Thank You

[ben7]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Could be a bad ccfl, bad ccfl wiring, or a bad backlight inverter.

Have you checked the resistance across the high voltage pins on the the backlight inverter transformer?

[budm]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Pictures of how all the boards are connected? Pictures of the boards? Disconnect the power cable between the Inverter and the power supply to see if the power LED will still flicker.

[johnboy1313]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

I had the same problem with a 46" Sceptre X460BV. Turned out to be the T-Con.

https://www.badcaps.net/forum/showthread.php?t=25717

The important info starts at post #65 on page 4.

Edit** My set would power off and on with the button. You may not be having the same issue, but it's a place to start.

[guyonphone]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Hey Everyone,

I appreciate the recommendations. Tonight when I get home I will take high-res photos of the back of the TV. I apologize for not doing that already. I will also try budm's suggestion of removing the cable from the power inverter to see if I still have a flickering issue on the power LED.

One other thing (and I know this is super lame) but I don't yet have a multi-meter. That doesn't mean I'm not serious about fixing it however, I will be buying one shortly, just have to wait for payday :-)

Thanks!

[guyonphone]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Hello Everyone,

I have done as Budm has suggested and disconnected the power cable between the inverter and the power supply.

When I try to power it on, the LED power light comes on, and after a few moments flickers and then goes out.

Attached are some pictures of everything as was requested:

Back of TV opened


Power supply


Main board


Inverter Board


I am still learning about LCD tv's does this tv have a t-con board? Can that function be built into the main board?

Thank You

[budm]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

The T-CON is under the shielded metal cover next to the power supply.
So we need to look at the 5VSTBY output to see if it is steady or not.
Is there any voltage labels on the power supply board connector that goes to the main board?
The connector on the main board that has a ground wire attached to the screw is the one that supply the signals and voltage to the T-CON board, you will have be real careful when trying to remove the connector because it has very small wires attached to it.

[guyonphone]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Hello Budm,

Yes there are

Connector that goes to main board.

[budm]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Measure the DC voltage at that '5V' pin. you can use the chassis as the ground point.

[guyonphone]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

T-Con Board

[guyonphone]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

OK, I don't have a multimeter, I tried to buy a Fluke 87v yesterday at Fry's, but they were out of stock. Ill get one, and will reply back here when i can do what you have requested. Do you recommend any particular multi-meter? Also thank you so much for the help, you have no idea how much I appreciate it!

Thanks

[johnboy1313]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

The Fluke 87 is a nice meter. I would love to have one. With that said, you can get a meter that will work for this purpose for less than $10 at Harbor Freight.

[guyonphone]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Hello Budm, johnboy1313,

I bought a new CEN-TECH multimeter at harbor freight for 20 bucks. I put everything back together and I did the following.

1. Clipped ground to the chassis, and put the positive lead on the 5v line.

2. I plugged in the TV, for the first 2 seconds, I get 5V DC, then it falls down to 2V DC, and slowly continues to decline after that.

3. If I hit the power button at that moment, it will power up, the line will read 5V DC again, and then the TV will power down again.

Thanks!

[budm]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

OK, can you give all the voltage labeling on both two white connectors (one is CN4, another I cannot see the number)?
Then the good closed up shot of both sides of the power supply board, and also 1/4 section shot of both side of the board so I trace out the connections. I suspect you may have bad start up cap in the 5VSTBY section which is generayed by the smallest yeallow transformer on the board.

[budm]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Try replacing these two caps (in red circles) or trying heating them up with hair dyer for 2~3 minutes then plug the TV into the outlet and see if 5v will stay at 5v. I got the pictures from other thread.

[guyonphone]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Oh Man,

That worked!
Thank you Budm, now allow me to explain why this is hilarious and why I feel seriously stupid right now.

I thought I had replaced those capacitors, and in fact I had replaced one of them, the fatter one 50v 100uf. However the smaller one 50v 1uf, which had no signs of damage physically, i didn't replace apparently, and then I looked through my old pile of capacitors next to the tv and found the capacitor from the kit I was supposed to replace it with, which means that i need to now go back to the store i bought the kit from and return my refund :-)

Thank you Budm I seriously appreciate your help, you got my tv working again!

If i can buy you a beer or something let me know.

Thanks

[budm]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Glad it was something simple, great works fixing it.

[guyonphone]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Just want to make it clear that the original kit I purchased did fix the issue.

[ozmodz]

Re: Sceptre X32GV-Komodo Turns on but then turns back off, after logo, with some flic

Try replacing these two caps (in red circles) or trying heating them up with hair dyer for 2~3 minutes then plug the TV into the outlet and see if 5v will stay at 5v. I got the pictures from other thread.

Hello! Not new here, just couldn't find my old log in information!

I replaced all of the "bulging capacitors" on my board, still having power issues. No power light, nothing works when plugged in.

I can heat up the capacitors in the above picture but, I only get the blue power light to flash for a second when I plug in the power and then it turns off.

Any ideas? Guessing I should replace the 2 capacitors pictured above?

Thanks!