Tv sound works sometime and not other times

Hi, the motherboard could have been affected. Since you have ever replaced the power supply, its better you get a new motherboard.

Defective LED back lights strips, or damaged EEPROM on main board. I will try a main board first, if you do nor have a TV LED strip tester.

I have had the same issue with a Westinghouse 50 inch LED TV. I believe it is not the power supply but the HDMI input. You can temporarily work around by plugging your primary source into the other HDMI. You may also get some relief by using the Westy remote, finding the TV menu, then selecting (Option) (Restore All). There may be an arcane procedure to reset the HDMI.

Hello
The power supply regulator board to your set has the fault. If you try to open the set, or try to repair it by yourself, the warranty will void. The set must have warranty as it is new. Why do you spend for it? Just contact the nearest authorised service center for Sceptre. the components in this set will be very hard to get from open electronic spare part market, and will costly too.

hello my is rico i work on tvs sometimes, it looks like you have bad lamp or your cooling system is work properly maybe thermal sersor. if need help fixing your tv let me know feel free to call me at 602-810-7149 anytime.

I have the same issue, we've had to change our bulb three times in less than two years. now we have 61" expensive paper weight. Our current bulb is less than 6 months old. The TV is only 2 years old and like i said this is our third bulb.

the blue light blinks 4 times. you get sound. then a few minutes the the picture returns... then it goes out, and the cycle goes on.

A solution to this would be greatly appreciated.

sounds like the convergence chip. i think you can get a kit from tvrepairkits.com not sure how much it would be to have fixed. But if your good with a soldering iron i think their kits come with instructions as well.

It seems that there are capacitors in the power supply which have dried or leaked, It is vurtually impossible to diagnose sight unseen however, the fact that it effected the three colours I envisage that problem to be associated with the supply, also the curving effect makes me look there, it seems that there is a ripple in the AC. I am assuming that it would take around 1.5hrs and cost of caps. This is working on the assumption that the fault is what I have listed without looking at it. Cost may be around the $150-$250 but don't quote me, I can't see the fault so it is an educated guess only...Phil

too much refresh rate! set it to 60 hz only! you're over-stressing major components on your monitor!

Check the Flyback, had same problem, replaced it and the unit worked good.