uniu
Posts: 5
Joined: Sat Mar 12, 2016 9:08 pm

Official Raspberry 7" screen problem - vertical colored lines only

Sat Jun 16, 2018 9:30 am

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!

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DougieLawson
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Re: Official Raspberry 7" screen problem - vertical colored lines only

Sat Jun 16, 2018 9:51 am

Pull the green and yellow wires off.
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uniu
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Joined: Sat Mar 12, 2016 9:08 pm

Re: Official Raspberry 7" screen problem - vertical colored lines only

Sat Jun 16, 2018 12:24 pm

DougieLawson wrote:
Sat Jun 16, 2018 9:51 am
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.

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DougieLawson
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Re: Official Raspberry 7" screen problem - vertical colored lines only

Sat Jun 16, 2018 12:40 pm

Pull the ribbon cable, re-fit and retest.
If that doesn't work, replace the ribbon cable.
Microprocessor, Raspberry Pi & Arduino Hacker
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gkaiseril
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Re: Official Raspberry 7" screen problem - vertical colored lines only

Sat Jun 16, 2018 4:38 pm

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
Posts: 5
Joined: Sat Mar 12, 2016 9:08 pm

Re: Official Raspberry 7" screen problem - vertical colored lines only

Sun Jun 17, 2018 9:00 am

gkaiseril wrote:
Sat Jun 16, 2018 4:38 pm
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.

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DougieLawson
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Re: Official Raspberry 7" screen problem - vertical colored lines only

Sun Jun 17, 2018 9:02 am

There are no parts available for the 7" display. Your only choice is a complete new display.
Microprocessor, Raspberry Pi & Arduino Hacker
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gkaiseril
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Re: Official Raspberry 7" screen problem - vertical colored lines only

Sat Jun 23, 2018 6:16 pm

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

uniu
Posts: 5
Joined: Sat Mar 12, 2016 9:08 pm

Re: Official Raspberry 7" screen problem - vertical colored lines only

Fri Oct 05, 2018 6:15 pm

Hi All.

Finaly I found the problem.
The driver board was broken.
But I successfully replaced by a not official driver board.

This is the driver board (I bought without LCD screen)
https://www.aliexpress.com/item/New-7-i ... 4c4dZictxI

aBUGSworstnightmare
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Re: Official Raspberry 7" screen problem - vertical colored lines only

Fri Oct 05, 2018 6:33 pm

uniu wrote:
Fri Oct 05, 2018 6:15 pm
Hi All.

Finaly I found the problem.
The driver board was broken.
But I successfully replaced by a not official driver board.

This is the driver board (I bought without LCD screen)
https://www.aliexpress.com/item/New-7-i ... 4c4dZictxI
would be interested to see how this connects to DSI interface and your touch

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