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Lines on the screen : 5.0" 40-pin 800x480 TFT Display withou
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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by djblex on Thu Sep 28, 2017 9:21 am

Hello,
Raspian has been installed and many settings were tested but still the blue line on the left and on the top. (pic below)
What can i do now ?
Could you look at my another case please about the superimposed images ;) i ll add news pics :)
viewtopic.php?f=45&t=123982&p=619145#p619145

I am worried a lot because I have to stop my big project in waiting to find the solution with the screens. All my screens do the sames problems : Blue lines ans superimposed images.

Thank you very much for you support.
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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by adafruit2 on Thu Sep 28, 2017 3:52 pm

yah i dont know what it is but it's the same with all your hardware and Pi's so i dont think its a hardware issue. other than the HDMI audio fix, I have no other suggestions!

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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by djblex on Fri Sep 29, 2017 3:20 am

Hi, thank you. I think this is due to this model of 2016 august. I own 3 of them and all do the same. If i find a solution, i ll write it on this topic.
A last question , could you say me what is the input voltage of the screen, but not this of the input of TFP401 that 's 5v.
Have you the datasheet document ?
Have a nice day.

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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by adafruit2 on Fri Sep 29, 2017 12:43 pm

sorry we do not understand - a datasheet document for what part?

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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by djblex on Fri Sep 29, 2017 1:48 pm

For the screen 5' ;)

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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by djblex on Fri Sep 29, 2017 1:51 pm

Even both if you could, datasheets for the screen and for the TFP401. Thank you

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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by adafruit2 on Fri Sep 29, 2017 2:07 pm


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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by djblex on Mon Oct 23, 2017 6:19 am

Hello, finally solved in part :) !!!
Today, i received a new TFP401. Just plugged and all works good, no lines anymore. (See the pic)

But few days ago, with an arduino UNO, i flashed the EEPROM of my two anotherTFP401 and no changement, always blues lines. here the code i used (https://learn.adafruit.com/adafruit-tfp ... g-the-edid).

So please, is there a good process to flash the EEPROM ?
I followed exactly the tutorial here (https://learn.adafruit.com/adafruit-tfp ... g-the-edid).

If not, i would like to return my two another TFP401 for an exchange.
For the story , i bought 3 at Mouser including one died on arrival.
So they shipped me a new for replacement ans this is this one that i received today and which works without lines on left and top .
And if i have to replace the two another TPF401, i suppose Mouser needs explanation.
Thank you very much.
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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by djblex on Mon Oct 23, 2017 8:56 am

Yeahhh :)
This new TFP401 solved me 2 problems :
-No more blue lines as described in this topic.
-AND NO MORE IMAGES SUPERIMPOSED...

NOW Finally my Super GAME PI WORKS WELL :)

So please, i would like to replace my another two TPF401, (all were tested on them) : flash EEPROM without result, Ribbon cables changed, screens replaced.

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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by adafruit2 on Wed Oct 25, 2017 12:07 am

thats just so weird, its all the same chiip can you try one other thing? we just updated the config.txt here
https://learn.adafruit.com/adafruit-5-8 ... -pi-config

to be just this

Code: Select all | TOGGLE FULL SIZE
# uncomment if hdmi display is not detected and composite is being output
hdmi_force_hotplug=1
 
# uncomment to force a specific HDMI mode (here we are forcing 800x480!)
hdmi_group=2
hdmi_mode=87
hdmi_cvt=800 480 60 6 0 0 0
hdmi_drive=1
 
max_usb_current=1
   


can you try that first? It will help us a lot!

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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by djblex on Wed Oct 25, 2017 9:19 am

First, thank you very much, i tested with the code above and it seems working good :). No lines , No images remained superimposed.

Then I completed the code by mine and without "max_usb_current=1 " and all works good.
Then i replace my original "config.txt " and the problems come back. All codes are exactly the same but not in the same order.

Is there an order to follow for the command lines of the config.txt file?

Here my config.txt which give problems :

Code: Select all | TOGGLE FULL SIZE
# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=on



# uncomment to force a specific HDMI mode (here we are forcing 800x480!)
hdmi_force_hotplug=1
hdmi_group=2
hdmi_mode=1
hdmi_mode=87
hdmi_cvt 800 480 60 6 0 0 0
arm_freq=900
core_freq=250
sdram_freq=450
over_voltage=2
avoid_safe_mode=1
gpu_mem=256
overscan=1



Here the config.txt which works :
Code: Select all | TOGGLE FULL SIZE
# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=on


# uncomment if hdmi display is not detected and composite is being output
hdmi_force_hotplug=1
 
# uncomment to force a specific HDMI mode (here we are forcing 800x480!)
hdmi_group=2
hdmi_mode=87
hdmi_cvt=800 480 60 6 0 0 0
hdmi_drive=1
 
arm_freq=900
core_freq=250
sdram_freq=450
over_voltage=2
avoid_safe_mode=1
gpu_mem=256

disable_audio_dither=1

overscan=1

Really what is the difference :) ?

If I lived in your city, I would bring you lots of cakes to thank you :)
i need to test the second TFP401 and i come back.

djblex
 
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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by djblex on Wed Oct 25, 2017 9:26 am

just me again, i just thought that for the new TFP401 that i received, i did not change my config.txt and worked good.

So maybe , it is the EDDID flash that i did on the another two TFP401, which take time to come :)

Ok i'll test the another TFP401.

djblex
 
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Re: Lines on the screen : 5.0" 40-pin 800x480 TFT Display wi

by adafruit2 on Wed Oct 25, 2017 11:37 am

thank you! yes as you can tell...the configuration is a bit of a "magic spell" the words have to be in a special order but it isn't easy to know what it is :)

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Please be positive and constructive with your questions and comments.