MTCB Joying Display flickering and "burned in" picture

[messiah]

Hey there,
I have some issues with the MTCB. Someone had these before?
First problem which is already quite annoying is that pictures are kind of burned in and still show shadows on the other screen
Second problem which is even more bad is that the display flickers. This is more or less obvious in different scenes.
When looking closely it seems like there is a grid (coming and going in the same frequence like the music is playing?). The attached video shows it.

Especially with white background the flickering gets very bad.
Don't know if this could be related to the Malaysk Firmware I use. Or is is it a hardware issue?

Also contacted the support. Let's see what they say...

 

[typos1]

Hey there,
I have some issues with the MTCB. Someone had these before?
First problem which is already quite annoying is that pictures are kind of burned in and still show shadows on the other screen
Second problem which is even more bad is that the display flickers. This is more or less obvious in different scenes.
When looking closely it seems like there is a grid (coming and going in the same frequence like the music is playing?). The attached video shows it.

Especially with white background the flickering gets very bad.
Don't know if this could be related to the Malaysk Firmware I use. Or is is it a hardware issue?

Also contacted the support. Let's see what they say...

Sounds like a screen issue to me, have you checked the ribbon connector hasnt come slightly undone ?

 

[messiah]

Hi, thanks for answering.
Attached is the video I spoke about. I missed to upload it.
You mean to open the device and check the ribbon connector inside, right?
Regards

edit: the video

 

[pczao]

Hey there,
I have some issues with the MTCB. Someone had these before?
First problem which is already quite annoying is that pictures are kind of burned in and still show shadows on the other screen
Second problem which is even more bad is that the display flickers. This is more or less obvious in different scenes.
When looking closely it seems like there is a grid (coming and going in the same frequence like the music is playing?). The attached video shows it.

Especially with white background the flickering gets very bad.
Don't know if this could be related to the Malaysk Firmware I use. Or is is it a hardware issue?

Also contacted the support. Let's see what they say...

This is commom in these units.
It's worst when it's hot.
I kinda fixed mine opening it and adjusting some kind of screw near the screen. You turn it and screen gets darker, you need to find a point between too dark and flickering. But when I park my car at the sun, and it gets hot inside, screen get bright again, so flickering and persistent images.

 

[pczao]

And here is a video about it.

 

[typos1]

This is commom in these units.
It's worst when it's hot.
I kinda fixed mine opening it and adjusting some kind of screw near the screen. You turn it and screen gets darker, you need to find a point between too dark and flickering. But when I park my car at the sun, and it gets hot inside, screen get bright again, so flickering and persistent images.

Personally I wouldnt say "common" - I ve only hear about 3 people mention it in the last 3 years.

 

[pczao]

Personally I wouldnt say "common" - I ve only hear about 3 people mention it in the last 3 years.

It's commom. That's why Joying even put a video online to show how to fix it.
I believe that when they produce the unit, it's now well tuned up, or it's cold in the factory and they don't realize, so when someone who lives in a hot weather area install it, the problem appears.
It's a bad hardware design, they use analog potentiometer, they should use some digital and automatic one to regulate screen frequency.

 

[typos1]

It's commom. That's why Joying even put a video online to show how to fix it.
I believe that when they produce the unit, it's now well tuned up, or it's cold in the factory and they don't realize, so when someone who lives in a hot weather area install it, the problem appears.
It's a bad hardware design, they use analog potentiometer, they should use some digital and automatic one to regulate screen frequency.

Well, Like I said, I ve not heard much about it in the 3 years I ve been following the threads on here, but I do remember Joyous having problems with their screens and 5.1.1 - they couldnt get 5.1.1 to work on their 4.4.4 RK3188 units unless the screen was changed !! Sounds like its more a problem with Joyous units.

 

[pczao]

I agree there's not many complaints about this problem here, that's why I believe that may be some "quality check" sloppiness. It's very simple to solve anyway.
But all units seems to use analog potentiometer, so, bad design. There's nothing to do with Joying only and the fact they changed screen to update to 5.1.1.
And most users in this forum don't live in hot weather areas. In my case, Brazil, is hot must time of the year, above 34 C degrees (93 F), in the shade.

 

[typos1]

I agree there's not many complaints about this problem here, that's why I believe that may be some "quality check" sloppiness. It's very simple to solve anyway.
But all units seems to use analog potentiometer, so, bad design. There's nothing to do with Joying only and the fact they changed screen to update to 5.1.1.
And most users in this forum don't live in hot weather areas. In my case, Brazil, is hot must time of the year, above 34 C degrees (93 F), in the shade.

Thanks for reminding me that its only 4 C degrees here in the UK

 

[pczao]

Thanks for reminding me that its only 4 C degrees here in the UK

Don't make me jealous!!
UK weather is great. I've been there once, liked very much.
Some friends are going to travel there later this month. I'm unable to go because my daughter is too young.

 

[typos1]

Don't make me jealous!!
UK weather is great. I've been there once, liked very much.
Some friends are going to travel there later this month. I'm unable to go because my daughter is too young.

Youre envious of 4 deg C ?! I get 34 deg C is a bit hot, but 4 is a bit cold !

Half way between 4 and 34 @ 19 deg C would be perfect

 

[pczao]

Youre envious of 4 deg C ?! I get 34 deg C is a bit hot, but 4 is a bit cold !

Half way between 4 and 34 @ 19 deg C would be perfect

Agreed!

 

[typos1]

Agreed!

Lol, meet you in St.Helena, thats about half way init?

 

[pczao]

Lol, meet you in St.Helena, thats about half way init?

I looked at the map and St. Helena is a little to the south, a direct flight seems a better option.
But feel welcome if you want to come to Brazil someday.
It's a bit messy but it's a good country. I'm not going to take you to meet any favela, by the way. Don't know why tourists are so eager to go in one, it's very dangerous, and I don't think they represent Brazil that much, so many different beatiful places to go.

 

[typos1]

I looked at the map and St. Helena is a little to the south, a direct flight seems a better option.
But feel welcome if you want to come to Brazil someday.
It's a bit messy but it's a good country. I'm not going to take you to meet any favela, by the way. Don't know why tourists are so eager to go in one, it's very dangerous, and I don't think they represent Brazil that much, so many different beatiful places to go.

dont worry, slums were not the first thing on my mind when thinking about Brazil

 

[messiah]

And here is a video about it.

Hey there, thanks but the video is not working.
I did not open the unit yet to check if the screw will improve. But I will test soon when I find some time.
By the way it's around 0°C here. So not very warm

Attached is another video. The flickering of the right white picture is actually visible. It's not a flickering of the camera.

 

[pczao]

Hey there, thanks but the video is not working.
I did not open the unit yet to check if the screw will improve. But I will test soon when I find some time.
By the way it's around 0°C here. So not very warm

Attached is another video. The flickering of the right white picture is actually visible. It's not a flickering of the camera.

Here's the link of the video: https://m.youtube.com/watch?v=GsRriCgZzd4
Just open the unit and fix it, very easy.

 

[messiah]

Took some time until I tried the fix. But the screw fixed it.
Carjoy recommended a power filter, but since the screw fixed it i prefer this...

The screen is now slightly darker. But I like the crisp image and better saturation of the colors (and of course no flicker).
Thanks!

 

[livethemountainlife]

Took some time until I tried the fix. But the screw fixed it.
Carjoy recommended a power filter, but since the screw fixed it i prefer this...

The screen is now slightly darker. But I like the crisp image and better saturation of the colors (and of course no flicker).
Thanks!

Does the unit have to be powered on when tighten the screw?

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