Korg Forums

striphio

Hi. I had problem with pa4x screen last night on gig. Screen suddenly goes gray with some vertical lines. I tried to restart keyboard several times, moved screen but no luck. Screen is always the same. Sounds and everything other work fine, screen is also working, but cant see nothing what I pressing. Fortunately, I have second keyboard and live band so gig goes on without problems.
Tomorrow at home I turn on pa4x and all was fine again, screen was normal. I search forum and find some "karmathanever" post about some screen issue. Its somehow connected with ribbon controller. So I touch ribbon on pa4x and touch screen and same problem appeared again.
Any thoughts?
https://ibb.co/v19xC5c

musiccankill · Posted: Sun Jan 08, 2023 3:10 pm Post subject:

This doesn't seem to have anything to do with the ribbon controller.The ribbon controller doesn't even connect to the same board as the screen...
Most likely it is a screen or cpu board issue or the connections between them.
If you open and close the screen a lot , it could be the flex cable that has gone bad.
Can you put a link on the post that Karma did say something like that?
I remember a touch screen issue where when you touch something metal on the keyboard it starts detecting correct touches again (maybe it would do it with the ribbon touched too) but never seen a screen going bad that way yet.
Keep up posted about what happened!
_________________
~~~The best keyboard for any player is the one that fits his/her needs!~~~

Korg keyboards owned now: PA5X 61 ,PA300, Triton extreme 61, Korg 707, Trinity plus

striphio · Posted: Sun Jan 08, 2023 3:53 pm Post subject:

I also don't know how ribbon and screen are connected, but, like I said, day after, when everything was OK with screen, I was moving it, touching, and all thing I remember that I could done it when problem appeared, I didn't manage to recreate problem. When I readed this with ribbon, I touched ribbon and touched screen and bingooo, problem appeared instantly.
Here is the link http://www.korgforums.com/forum/phpBB2/viewtopic.php?t=108060&sid=d98fa8a6d5cd6272172c08c0d9725456

Now I reading it again, and not sure what ribbon he is talking about, connector or cable... Rolling Eyes

But still not sure how this happened when i touched ribbon controller and screen.

striphio · Posted: Mon Jan 09, 2023 10:34 am Post subject:

Today is always in "gray mode". When I swipe with finger on upper left part of the screen it response like changing brightness or something similar.

https://youtu.be/DloJL_8jUqo

musiccankill · Posted: Mon Jan 09, 2023 5:46 pm Post subject:

80% is the screen (actually the pcb behind the screen but they are sold as a module) ..
If you press any other button like global or media does it respond and change what is shows on the screen (not show correctly but different)?
_________________
~~~The best keyboard for any player is the one that fits his/her needs!~~~

Korg keyboards owned now: PA5X 61 ,PA300, Triton extreme 61, Korg 707, Trinity plus

striphio · Posted: Mon Jan 09, 2023 9:50 pm Post subject:

musiccankill · Posted: Mon Jan 09, 2023 10:46 pm Post subject:

You have to either open it up if you know what you are doing or take it to a repair shop.
First move is to reseat all flex cable strips and if that doesn't fix it, replace the screen assembly would be the next logical step.
_________________
~~~The best keyboard for any player is the one that fits his/her needs!~~~

Korg keyboards owned now: PA5X 61 ,PA300, Triton extreme 61, Korg 707, Trinity plus

striphio · Posted: Mon Jan 09, 2023 11:00 pm Post subject:

Thanks for your help. I will open it and try.

musiccankill · Posted: Mon Jan 09, 2023 11:03 pm Post subject:

Be careful and best of luck!
If you need more help pm me and hopefully i ll be able to help
_________________
~~~The best keyboard for any player is the one that fits his/her needs!~~~

Korg keyboards owned now: PA5X 61 ,PA300, Triton extreme 61, Korg 707, Trinity plus