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Faulty 5.0" 40-pin TFT Display 800x480 (Non-Touch)
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Faulty 5.0" 40-pin TFT Display 800x480 (Non-Touch)

by supaevensteven on Sun Jan 08, 2017 8:15 pm

Hi I purchased a 5.0" 40-pin TFT Display - 800x480 without touchscreen Order No: 828825-5521556001.

The LCD details sticker has:
KD50G21-40NT-A1
2015.03.30


I use the LCD screen with a Kippah hat. Unfortunately I've always had a horizontal line of black pixels on the screen that don't appear to work.

I contacted Adafruit a while ago to get support and they pointed me here.

I've already tried:
- re-seating the 40-pin flex cable in the kippah connector
- fresh install of raspbian and the kippah guide

I want to use the screen to make a video doorbell with my RPi2

Can you please help me fix the LCD fault?

Thanks,

Stephen

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Re: Faulty 5.0" 40-pin TFT Display 800x480 (Non-Touch)

by franklin97355 on Sun Jan 08, 2017 11:22 pm

Could you post large, clear, detailed pictures of both sides of your board and the connections to it? Pictures should be less than 1meg in size.

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Re: Faulty 5.0" 40-pin TFT Display 800x480 (Non-Touch)

by supaevensteven on Mon Jan 09, 2017 1:12 am

Thanks for the fast reply. Please find the the requested photos attached.

I'm using a 2.0A 5V power adapter to power the raspberry pi. I have nothing else connected to the Raspberry Pi 2 other than a power cable and the Kippah Hat.

No connections have been soldered to the Kippah Hat. The only connections are the GPIO header and the 40-pin LCD flex cable.

I hope this helps.

Thanks,

Stephen
Attachments
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20170109_155804.jpg
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supaevensteven
 
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Re: Faulty 5.0" 40-pin TFT Display 800x480 (Non-Touch)

by supaevensteven on Mon Jan 09, 2017 1:13 am

Board specific photos:
Attachments
20170109_160318.jpg
20170109_160318.jpg (265.9 KiB) Viewed 276 times
20170109_160232.jpg
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20170109_160156.jpg
20170109_160156.jpg (943.23 KiB) Viewed 276 times

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Posts: 12
Joined: Wed Aug 05, 2015 7:59 pm

Re: Faulty 5.0" 40-pin TFT Display 800x480 (Non-Touch)

by supaevensteven on Mon Jan 09, 2017 1:18 am

I thought it's worth mentioning that as you can see in the photos of the active LCD above I get a mixture of white/black lines. Either they rarely flicker or they're constantly solid and persistent on the screen. A couple of times I've noticed they've disappeared and the screen looks perfect but it doesn't last very long.

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Posts: 12
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Re: Faulty 5.0" 40-pin TFT Display 800x480 (Non-Touch)

by supaevensteven on Sun Jan 07, 2018 5:01 am

Order No: 828825-5521556001

Mate, can someone organise the replacement of these faulty units. I purchased the parts 2015-07-11 and reported the fault via email to Stephanie of Adafruit on 2015-27-11.

The fact no one from Adafruit followed up on this or replied to my issue baffles me.

supaevensteven
 
Posts: 12
Joined: Wed Aug 05, 2015 7:59 pm

Please be positive and constructive with your questions and comments.