I turn it on and the splash screen comes up, but then within a second or two the TV powers off again. Of course w/ my luck, the TV is EXACTLY 1 year and 1 week old so no luck with any kind of warranty. no button is stuck both on the remote and the TV, turn it off and back on after a couple of minutes. ... How To Reset A Coby TV. can't seem to find repair shop. Obvious aside, yes - remote and also tv buttons result in the same. 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. The blue LED turns on when it's plugged it but it won't power on. should i just junk it. coby says sorry! 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. 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. An internal timer might accidentally be set to turn on the TV. The only thing that "worked" since then, is the LG logo below the display turned on for a second when turning on the TV. extended warranty with store went out of business. Any suggestions to fix this? 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. Other than that only the power cable is hooked up. 2 – Check to be sure all cable and cords are securely connected to the TV inputs and component outputs. I know I shouldn't have bought a Coby TV but it was on sale. Follow this guide for the fuses. 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. Nick,It does sound like a power board issue. Model: NS-40D420NA16. :twisted: A TV that turns itself on or off isn't necessarily broken. If there is nothing wrong with the remote control, i.e. 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. My Coby TV won't turn on anymore. ... 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. 18 months time since new. 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. There might be a stuck power button on the remote, or the remote's batteries are running low. Right now I have it hooked up using the coax cable from the wall to the tv's coax input. 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. Easy Fixes for Common TV Problems. Now it does that same thing every time. If could be a $10 fix or a lot... - Sanyo dp50747 Plasma TV Most of the Vizio Smart TV's users faced the Vizio tv keeps turning off and on itself problem. I don't have the remote for it - it broke. A simple, easily fixed problem is usually the culprit. Look for any bulging tops on the caps as well as any leakage. 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. If your television suffers from a distorted picture, weird colors, or the dreaded "soap opera effect," these simple fixes can help improve your picture. 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