Hisense tv,makes buzzing sound,turns off then turns right back on,picture perfect

1. Why hisense TV red flashing power light has sound but no picture
There could be a few reasons why your Hisense TV has a red flashing power light but no picture. It could be an issue with the TV itself, the power supply, or the input signal. Let's take a look at each of these possibilities in turn.

2. How to fix hisense TV red flashing power light has sound but no picture

If your Hisense TV has a red flashing power light but no picture, there are a few things you can try to fix the problem. First, check to make sure that the power supply is plugged in and that the TV is receiving power.

Next, check the input signal to make sure that it is compatible with the TV. Finally, if the TV itself appears to be the problem, you can try resetting it.

3. What to do if hisense TV red flashing power light has sound but no picture

If your Hisense TV has a red flashing power light but no picture, there are a few things you can try to fix the problem. First, check to make sure that the power supply is plugged in and that the TV is receiving power.

Next, check the input signal to make sure that it is compatible with the TV. Finally, if the TV itself appears to be the problem, you can try resetting it.

The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

It all depends what has led up to the problem, however if there has
been no indication of something going wrong,ie. picture getting dimmer, the most common fix is to reset.
First just check all cables are firmly connected. If that does not work then....
Unplug tv, disconnect from cable box, satellite box, any receivers.
Also turn power off to them as well.
Connect everything back and turn on.

Here is a video of other generic problems that can go wrong on any
tv that leads to sound with no picture.
TV Has Sound But No Picture Troubleshooting Guide

If it is new I would definitely insist on having the matter investigated and repaired under warranty. It should not be doing that!

This tv have a colors wheel. The tv colors wheel is dead.The buzzing noise is the cause of the colors wheel is spinning of is axis and rubbing sides of the motor.Hire a tv tech. for the job.Colors wheel is hard to replaced,because have to take out many other machanical parts,even before can change the colors wheel it self.

Hello,

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GOOD LUCK

It is probably the color wheel that needs replacing.

Is the buzzing coming from the back of the TV, staying loud even when the volume is turned all the way down, or is it coming from the speakers?

I have the same TV. The screen went dead. Turned on the tv and waited for a few minuites for the picture to come on, the light went out. the tv is dead. I am dealing with Hyundai to have it repaired. You have to file a claim on the web site. They contacted me and I had to send them a picture of the Tv. I am waiting for there reply. I had the same problem with a TV i bought my mother. It is a Hisense. I am dealing with them, long time getting back to me. Both tv's sound like they have the same problems, power supply.