Any suggestions to fix this? Obvious aside, yes - remote and also tv buttons result in the same. After warmup (about 30 minutes) TV turns off and then restarts itself in 30 second, stays on for about 3 minutes and this on/off cycle repeats indefinitely. I am an IT guy so I have some basic hardware understanding; upon some research about LG TVs, I found that the issue is oftentimes blown capacitors. ... then press the menu instead of the power button it will eventually turn on then after an hour or 30mins will do power off using the tv power button then turn it on again in order that the remote will function.use a 110v transformer. Reasons Why Your TV Might Be Turning Itself On . Easy Fixes for Common TV Problems. For the first time ever today it turns on stays on for 10 seconds and then automatically turns itself off ... coby lcd tv started turning off after 5 months. Nick,It does sound like a power board issue. My Coby TV won't turn on anymore. In addition, you can do a "power reset" of the TV, if you unplug the TV from the power socket and press and hold the power button (on the TV, not on the remote control) for at least 10 seconds. Of course w/ my luck, the TV is EXACTLY 1 year and 1 week old so no luck with any kind of warranty. If your television suffers from a distorted picture, weird colors, or the dreaded "soap opera effect," these simple fixes can help improve your picture. extended warranty with store went out of business. If there is nothing wrong with the remote control, i.e. Now it does that same thing every time. Message 49 of 54 (2,787 Views) 0 Kudos John-BBY. When you first turn it on it usually will turn itself off and back on by itself and after it has been on a while it does it less frequently. There might be a stuck power button on the remote, or the remote's batteries are running low. should i just junk it. Other than that only the power cable is hooked up. coby says sorry! can't seem to find repair shop. Model: NS-40D420NA16. Basically, I came home one day and went to turn on the t.v., and it made the sound like it was turning on, but then turned immediately back off. I was told that if I unplugged it for a few hours that it may reset the tv and that would take care of it. ... How To Reset A Coby TV. I know I shouldn't have bought a Coby TV but it was on sale. An internal timer might accidentally be set to turn on the TV. The blue LED turns on when it's plugged it but it won't power on. A TV that turns itself on or off isn't necessarily broken. Follow this guide for the fuses. no button is stuck both on the remote and the TV, turn it off and back on after a couple of minutes. Social Media Specialist. Right now I have it hooked up using the coax cable from the wall to the tv's coax input. Here is what to check when your TV is turned on, power light is ON, but no picture is seen or sound is heard: 1 – Be sure the component you are using (Xbox, Cable, SAT, ROKU) is turned ON. 18 months time since new. :twisted: A simple, easily fixed problem is usually the culprit. I don't have the remote for it - it broke. You can read this article carefully for avoiding the Vizio tv shuts off randomly issues and also solve Vizio tv won't turn on problems. If could be a $10 fix or a lot... - Sanyo dp50747 Plasma TV Remove the power, take the back off of your TV and take a look at the capacitors on the power board as well as the fuses. I turn it on and the splash screen comes up, but then within a second or two the TV powers off again. Look for any bulging tops on the caps as well as any leakage. 2 – Check to be sure all cable and cords are securely connected to the TV inputs and component outputs. 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