Question about Sceptre NagaIII X30SV 30 in. HD-Ready LCD Television
I have a Sceptre X30SX LCD in which the display goes black with sound. From everything that I have read, the problem is with the power inverter PCB.
I have removed the back of the LCD out of curiosity and have some questions. Please see attached image. What are the main components of a LCD television? Which is the power inverter pcb? What are the other boards?
I too have the same problem...Searched and waited long time for parts. I have replaced everything and the thing still flashes and goes blank but has sound. Not worth anymore stress. My neighbor is an electrical engineer who I used to think can fix anything. He too is baffled. My fix suggestion... Getting a new LCD (not a Sceptre) tonight...with an extended warranty...Sceptre (and their tech's) no help if you don't have a warranty. I learned my lesson!
Posted on Jul 09, 2008
Resolder the transformers on the inverter.
Details on link below.
Posted on Sep 22, 2011
The defective inverter will cause the following symptoms:
* No Picture on screen but LCD TV still has Sound.
* Screen Flash on and Off between 1/2 to a few seconds, but power indicate light stays on and TV still has sound
P.S. - I have a brand New OEM Darfon v144.001 inverter for sale $125 + shipping.
Posted on Mar 18, 2009
I had the same problem. SOLUTION #3 worked. I almost messed up, as I undid the frame base by mistake and the set monitor over; brain fart.
First remove the power cord from the monitor. (Unplug it at the base ). I recommend that you disconnect all other adapters. Lay the monitor down, if possible.
All you need to do is to undo the cover ( 4 screws ) above the power connector. The power supply will slide out when the cover is removed. Remove the power box, it simply sits in this area. There is a connector cable at the top that goes into the back of the monitor and it inserts into a connector ( they may disconnect when you remove the cover over the power converter box). Simply stick your fingers into the area to the middle of the display and pull the connector into the power box area. Unplug the power inverter from the connnector. Wait a minute and reconnect the power box cable at the top of it to the connector. Put the connector and cable into the area you pulled it from. Put the cover back on over the inverter box. Plug it in and test that the MENU will display on the monitor. Put the monitor back where you want it and all should work. It did for me.
Posted on Nov 11, 2008
I have the same problem after just twoand a half years. My picture goes out sometimes with sound sometimeswithout. We have perched many televisions over the years, this is byfar the the worst TV we have ever had. How are companies allowed tosell this **** with such a bad track record?
Posted on Nov 22, 2008
I had the same problem, no picture, only audio! I wanted to test the VGA input since it does not require tuner. As soon as I hooked up the laptop, the picture from the all input started working! Problem gone, it keeps working!
Posted on Dec 02, 2008
I had the same problem with an Intertronic brand TV. This had the same inverter board as the Sceptre. I unassembled the TV to inspect, without proper diagnostic equipment I couldn't determine 100%, but still thought it was the inverter board. To be sure I took it to a TV repair shop that had only a $40 diagnostic fee (deductable from repair costs if they end up doing the work). The test came back positive for the inverter board, their quote was $290; I said no way, I'll do it myself. The shop owner asked me how much I thought it should cost, I said $160 (because I know the board costs $130-150, and figured the technician had already taken the TV apart to inspect so it shouldn't take much more work to put a new board in). We ended up agreeing on $190, which I found to be a deal cause they warranteed their work. TV now works great. I recommend you guys try a similar route if you are unsure of what is broken. Even if I didn't get the work done there, $40 is not too much to spend for a proper diagnosis.
Posted on Nov 12, 2008
Same problem here. Sound with no picture. Cannot switch between sources, a bit of blue then nothing. Unplugged power source and adapter, and replaced it, still same problem.
Thanks Sceptre, but your 3 year old product sucks!
Posted on Nov 02, 2008
I had the identical problem and found one solution from a fellow down under...he suggested a possible grounding issue in the cable connection. Voila! sure enough, I disconnected the cable, grounded it to myself and reinstalled the cable. The picture came right back. Unbelievable and I hope it works for a long time.
Posted on Aug 07, 2008
Me again, so far replaced all capicitors on the inverter board, replaced the power brick (can't open it, the manufacturer hammered ball bearings in the torx holes so you can't open it, stupid trick, just makes you not want to buy anything from them). Still the same problem. I'm going to replace all the capacitors near the power connector next, waiting on parts, keep you posted.
BTW, the lower board that is hidden under the shield is the circuitry for the LCD panel. Not for the backlighting, so this should not be a problem.
Posted on Mar 28, 2008
After 2-1/2 years with no problems on this exact same set, I'm now having the identical issue. Sound of video source, but no picture...except for the initial flash. Sometimes after a complete power off & unplug I get about 10 seconds of video signal (DVI) but then it goes blank too.
Any fix would be much welcome!
Posted on Mar 28, 2008
The board on the right is the inverter board, replacement for that is about $200. I don't know what the board on the bottom is yet, I haven't been able to remove the shield. I have tested the output on the power brick ($64 on ebay) and it is delivering 24V, and I've replaced all the capacitors on the inverter board but I still have the same problem (screen flashes blue with the input selection message at the top left, then goes black, but audio still works). I'm going to open up the TV again today and try to get that shield off so that I can see how much circuitry is between the brick and the inputs on the inverter board.
Posted on Jan 27, 2008
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