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First of all replace all the electrolytic capacitors in the power supply board. Some times bad electrolytic capacitors will lead to voltage drop and can cause this type of problems . when you buy the electrolytic capacitor try to buy one which has a high temperature spec just like 105 degree not ordinary 85 degree. It wouldn't cost a lot. Try to replace it before going to buy costly board. and one more thing whenever you post your question for a solution try to add the brand and model number of you are tv with your description.
Hello! Does sound comes out of TV speakers? Or you have "home theater" hooked up to? In first occasion: TV turns on, stays on, display blinks once, then nothing? Inverter is at fault. Second occasion: TV turns on, stays on, display glows dark, sound OK, no picture: T-con board at fault. Third occasion: TV turns on, shuts off, sound is coming through "home theater"-OK. Power supply or inverter, or T-con are at fault. TV need major diagnostics and repair in every case. Let me know if you can handle that. Will guide you through the process. Thanks, Alex.
Power supply board is dead.That the board,the power a/c cord go into it.Replaced the power supply board will solved ur tv power lite LED light indicator blinking and ur tv power will be stable and work again.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
One thing could be to check if your aerial is the correct one,(presuming you are in uk) for digital tv.
I have noticed that thre has been alot of questions regarding insignia tvs ,i suggest search this site.
Resetting the TV If the buttons on the remote AND the buttons on the TV case do not work (channels do not change and you cannot open or navigate the menu), the TV has stopped responding. Reset the TV as follows:
NOTE: Some TVs have a reset button. If available and accessible, try using the reset buttons before using the steps below. Using the reset buttons can save time. 1. Unplug the TV power cord from the power outlet. 2. Unplug any connected devices (DVD, Set-top boxes, etc...) 3. Press and hold the TV power button for five seconds. 4. Plug the TV power cord back into the power outlet and turn on the TV. 5. Open the on-screen menu to confirm that the TV is responding again. 6. Turn off the TV and reconnect the devices. 7. Turn on the TV.
LCD TV TroubleshootingThe defective LCD TV may have the following common symptoms:
Symptom: No picture on screen but LCD TV still has sound. Solutions: The problem is cause by defective inverter. Replacing ivnerter will solve hte problem. Symptom: Screen flash on and off between 1/2 to a few seconds, but power indicate light stays on and TV still has sound. Solutions: The problem is cause by defective inverter. Symptom: Blue Screen but no picture Solutions: The problem is cause by defective Main Board(AD Board). In some cases, this problem may cause by the defective Screen Controller board. Thsi board is mounting on teh back of LCD TV Scree. Symptom: Power light stays on but no display and sound Solutions: The problem is cause by defective Main Board(AD Board) or Power supply board. Symptom: No Power or Power indicate light does not lits Solutions: The problem could cause either by defective Power supply board or defective Main Board(AD Board). Symptom: Screen is half dim and half bright Solutions: The problem is cause by defective LCD Panel.It needs to be replace.
On mine the indicator light is indicating that it is in STANDBY mode, which means it is OFF. Press the button again, which will turn off the light and now the tv is ON. Now merely press(possibly multiple times) SOURCE to find the correct source for your Cable/SAT and your good to go.