Official Raspberry 7" screen problem - vertical colored lines only

[uniu]

Hi Everyone!

I try to use my old touch screen again, without any success. It worked well for 2 years ago.
I tried with other Pi and other cable also, but i have got the following vertical colored lines picture:
The ribbon cables are well sealed.

This is what is see:
https://drive.google.com/file/d/1iHX8Fy ... sp=sharing

Detailes:
Official 7" Pi touchscreen v1.1
Raspberry Pi3 B v1.2
Noobs Version: 2.8.1 and Raspian Stretch 4.14 (I tried both of them)

Does anyone have any idea?

Thanks in advance!

[DougieLawson]

Pull the green and yellow wires off.

[uniu]

Pull the green and yellow wires off.

Thank You for your answer!

But I connected the GND and +5V only...
Beside of that I tried with USB cable without any success.

[DougieLawson]

Pull the ribbon cable, re-fit and retest.
If that doesn't work, replace the ribbon cable.

[gkaiseril]

With 2 power supplies or a Y adapter one can avoid the jumper wires. Also make sure there no broken or lifted pads on the ribon and the ribon is straight in the socket.

I have used the 7" touch screen with many version of the pi with no issue. It might not work a non-raspbian os

[uniu]

With 2 power supplies or a Y adapter one can avoid the jumper wires. Also make sure there no broken or lifted pads on the ribon and the ribon is straight in the socket.

I have used the 7" touch screen with many version of the pi with no issue. It might not work a non-raspbian os

Thanks for everybody!

But as I wrote I tested with an other ribbon cable (it seems for me the camera cable and the dsi cable the same, so I change it for a camera cable) without any success. And I resealed of many times.

Do you know somebody how I replace the LCD driver board for a new one ? Maybe this will be the cheapest solution to continue the troubleshooting.

[DougieLawson]

There are no parts available for the 7" display. Your only choice is a complete new display.

[gkaiseril]

Make sure you are not shorting out any of the GPIO pins or any points on the bottom of the Pi.