Display not working - White screen
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Please be positive and constructive with your questions and comments.
- akmedia
- Posts: 10
- Joined: Sat Dec 20, 2014 2:27 pm
Display not working - White screen
Hello, I soldered and attached the Adafruit 2.8" PiTFT - Capacitive Touch to my Ra pi. Followed the easy installation and booted. I only get white screen display. However i when i run the touch test event i'm able to see the touch. Find the attached solder picture and dmesg. Let me know if there is any other way to test and fix this or RMA it?
- Attachments
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- FullSizeRender.jpg (249.59 KiB) Viewed 347 times
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- DMESG.txt
- (15.1 KiB) Downloaded 130 times
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Display not working - White screen
Those look like cold-solder joints. You'll have to reheat them, Make sure to touch the iron to both the pad and the pin. A good solder joint should be smooth and shiny with a concave section, like this:
The solder should flow completely over the pad and up the pin. You can see the pad on several of your solder joints - that shouldn't be the case.
The solder should flow completely over the pad and up the pin. You can see the pad on several of your solder joints - that shouldn't be the case.
- akmedia
- Posts: 10
- Joined: Sat Dec 20, 2014 2:27 pm
Re: Display not working - White screen
Thanks Rick. Is there any way to check to see which pins are not connected and needed to be soldered again? Because as i mentioned the touch events are picking up when i run the touch events through ssh. Only the display is not working.
- akmedia
- Posts: 10
- Joined: Sat Dec 20, 2014 2:27 pm
Re: Display not working - White screen
I re soldered all the points. Still no luck. Let me know if there is any way to check if I'm not getting any connection from one of the pins. As i mentioned i'm able to read the touch events through SSH. That means the connections are good.
- akmedia
- Posts: 10
- Joined: Sat Dec 20, 2014 2:27 pm
Re: Display not working - White screen
Updated photo
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- FullSizeRender (1).jpg (659.28 KiB) Viewed 306 times
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Display not working - White screen
The solders look better.
Please post the output from sudo dmesg
Please post the output from sudo dmesg
- akmedia
- Posts: 10
- Joined: Sat Dec 20, 2014 2:27 pm
Re: Display not working - White screen
find the dmesg attachment. Please confirm if i need to change anything or RMA.
- Attachments
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- dmesg_1222.txt
- (15.62 KiB) Downloaded 141 times
- adafruit2
- Posts: 22148
- Joined: Fri Mar 11, 2005 7:36 pm
Re: Display not working - White screen
Soldering looks better but is still looking a little iffy - please try to use a clean iron, make sure its hot enough, heat the pin & the pad, and have each solder point a perfect little hershey's kiss
- akmedia
- Posts: 10
- Joined: Sat Dec 20, 2014 2:27 pm
Re: Display not working - White screen
Thanks. Can you point to which pins require soldering again.? I even looked through magnifying glass to confirm all of them are done correctly. Is there a way to find out in Rapi if any of the pins are not connected correctly?
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Display not working - White screen
These are the important pins. The one on the lower right in particular looks iffy.
- akmedia
- Posts: 10
- Joined: Sat Dec 20, 2014 2:27 pm
Re: Display not working - White screen
Hello Rick, Did you find anything on dmesg? re soldering gave me the same result. Will upload the photo in the afternoon.adafruit_support_rick wrote:The solders look better.
Please post the output from sudo dmesg
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Display not working - White screen
dmesg looks OK.
Can you post a picture of the flex connector on the back of the display?
Can you post a picture of the flex connector on the back of the display?
- akmedia
- Posts: 10
- Joined: Sat Dec 20, 2014 2:27 pm
Re: Display not working - White screen
Thanks Rick. Find the backside LCD and backside PCB photo
- Attachments
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- lcdback.jpg (564.02 KiB) Viewed 254 times
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- pcbback.jpg (553.43 KiB) Viewed 254 times
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Display not working - White screen
Please email [email protected] with a link to this thread for a replacement display
- akmedia
- Posts: 10
- Joined: Sat Dec 20, 2014 2:27 pm
Re: Display not working - White screen
Thanks Rick.
Please be positive and constructive with your questions and comments.