fjordan2020
Posts: 2
Joined: Mon Aug 24, 2020 5:01 pm

Touch was working after some long time stopped working

Mon Aug 24, 2020 5:15 pm

Hello,

I have an official 7in touchscreen with Raspberry 3B and Raspbian; I assembled it about 2 years ago and it worked for a long time.

Then I left it unused for about 6 months.

Yesterday I turned it on again and the touch is not working anymore (the display still works ok).

Any ideas about what went wrong and what could I do to try to fix it?

Note: lsmod | grep -i FT shows rpi_ft5406... so I assume the touch controller is connected and working.

fjordan2020
Posts: 2
Joined: Mon Aug 24, 2020 5:01 pm

Re: Touch was working after some long time stopped working

Tue Aug 25, 2020 6:42 am

PS: Just forgot to say that it also did not work with the new Raspberry OS and that it is assembled in a case and stayed upright during the “shelf” period.

alanmalk
Posts: 4
Joined: Tue Aug 09, 2016 8:26 pm

Re: Touch was working after some long time stopped working

Tue Oct 06, 2020 5:01 pm

Going to post a "Me Too" - with hope that someone can help.

Same setup as the OP. Touch was working for a few years but now only a fraction of the screen responds. There are a couple of "dead" areas that extend from left to right across the screen, about 1 inch high.

No changes to the code or pi system, just ignored the unit for a few months.

I pulled and re-seated the ribbon cable from screen to pi - both ends. Wiggled the very fragile looking brown ribbon that goes from front to the backside of the screen. I actually think this movement of ribbons made matters worse - getting a bad feeling.

knight_parn
Posts: 1
Joined: Mon Oct 19, 2020 10:37 am

Re: Touch was working after some long time stopped working

Mon Oct 19, 2020 10:52 am

Same issue here.

The screen was bought back in 2016 and has been working fine for a long time. It was left un-used for about 2 months until yesterday. Now only the top 1/3 of the display works with the touch. I re-seated the ribbon cables but it didn't help. I also checked the front and back surface of the display control board, but no visible damage at all. I even swapped the rpi 4B 4GB with an old rpi 3B+ thinking the DSI port on the 4B might be broken, but the result remained the same.

Quchi
Posts: 2
Joined: Sat Oct 24, 2020 6:25 pm

Re: Touch was working after some long time stopped working

Sun Oct 25, 2020 2:07 pm

Same here
2 of them - stopped detecting large areas
1 no touch, the other only on (top right) a corner

Dussler
Posts: 4
Joined: Fri Apr 03, 2015 7:41 am

Re: Touch was working after some long time stopped working

Tue Feb 23, 2021 10:48 am

Same here.

Is there a solutions right now?

Dussler
Posts: 4
Joined: Fri Apr 03, 2015 7:41 am

Re: Touch was working after some long time stopped working

Wed Feb 24, 2021 9:30 am

Sorry for bothering, but is there a chance to get the touch working again?

This is the original Pi display! Is there no statement from the producer?

Thx

captainsemtex
Posts: 5
Joined: Sun Jun 02, 2013 6:28 am
Location: Canada
Contact: Website

Re: Touch was working after some long time stopped working

Sat Mar 06, 2021 7:22 am

:( Another ME TOO.

My original 7" display has been in a Smarti Pi Touch case since purchase and previously worked but has been unused for a couple of years.
I am using it with a Pi3B and a 2.5A supply with the USB Y cable. The display itself works perfectly, but no touch... and there are no rainbow low power warnings.

I followed the tests at https://www.raspberrypi.org/documentati ... hooting.md.

When I enter:

Code: Select all

dmesg | grep -i ft5406
there is *no* result. This is an obvious problem but it doesn't say anywhere how to fix this!?!

Also, when I enter:

Code: Select all

cat /proc/cmdline | grep bcm2708_fb
I correctly get fbheight = 480 and fbwidth = 800.

But when I open Raspberry Pi Configuration and go to the Display tab and click "Set Resolution", it shows the default is 720x480 and there is no 800x480 option.

I am running the latest Raspbian and latest updates.

Return to “Official Foundation Display”