SOURCE: I have a Philips Plasma tv 42pf5321d/37 with sound but no picture
Thats the great sound of Exploding capacitors on either the power supply board. or another one in there. Now the set is in fault protection. It tried to warn you with the RED blinking LED that there was something amiss by shutting itself down. When you unplugged you reset the error and allowed it to do it again.
Best Regards and Smper Fi
SOURCE: I have a LG 47LH40-ua
good day
that problem is many causes its either power supply loose connectors or the worst is the main got partially defects..I give you some tips to fix that any of 3 causes that mention above..
first causes,,the power supply,,its gives the supply of all the system of the unit..when it is not functioning well or the output supply is two low or high.. Also your TV is not function well..
step to troubleshoot;
1) remove the cover by unscrewing of all screw at the back side of your TV
2) check the output voltage such as 5v,24vdc..By power on again and use a multimeter tester range it to DC..if there's a voltage drop..
3) check if there's a leak or bulging top capacitor..if any leak capacitor replace it
like this
Next causes,the loose connectors..
1)reset the all connectors that you see inside your TV by disconnecting it and connecting it again
Next causes is the main board,,there's no easy remedy of that instead of resetting the power such as off/on
thank you and good luck
SOURCE: my vizio 55" screen randomly goes black and comes back on how do I fix this
It sounds that the back light inverter board has the fault. If you wish to get more details, check this site. Pull up older posts there. Check the site with patience, as it has over 2250 posts now. All are related to electronic equipment repair help. Search the site by 'Timeslide' option. It will make search easy. Or, type in the brand name to your device into its search box, and press "Enter"
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.
SOURCE: LED TV pulsing
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I recently replaced the power supply board because the led drivers are made into it and a bad LED strip also. That fixed my original problem before this. Sounds still works great when screen goes black
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