16x2 Blue LCD Kit for raspi, rPi doesn't boot

EL Wire/Tape/Panels, LEDs, pixels and strips, LCDs and TFTs, etc products from Adafruit

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
bonshates
 
Posts: 6
Joined: Sat Mar 23, 2013 1:35 pm

16x2 Blue LCD Kit for raspi, rPi doesn't boot

Post by bonshates »

So I carefully soldered together the kit enjoying every moment of it but in the end had no joy. The main problem is that rPi won't boot after attaching the kit. I have gone through all of the solder joints to check for shorts but haven't found any.

I checked another post that mirrors mine quite closely except that mine doesn't boot, ever. http://forums.adafruit.com/viewtopic.ph ... pi#p223499

If I remove the LCD board the rPi boot just fine. Plugging it in while the rPi is running causes it to crash. The LED on the power supply goes dark. Removing the board will cause the rPi to reboot and it comes up fine.

Not sure what to do next on this. Any help would be appreciated. :?
Last edited by bonshates on Sun Jan 19, 2014 5:46 pm, edited 1 time in total.

bonshates
 
Posts: 6
Joined: Sat Mar 23, 2013 1:35 pm

Re: 16x2 Blue LCD Kit for raspi, rPi doesn't boot

Post by bonshates »

This is the power supply I am using. http://www.adafruit.com/products/501

User avatar
adafruit_support_mike
 
Posts: 67446
Joined: Thu Feb 11, 2010 2:51 pm

Re: 16x2 Blue LCD Kit for raspi, rPi doesn't boot

Post by adafruit_support_mike »

It sounds like there's some kind of short circuit in the plate. Post a photo of it (800x600 images work best), well enough lit and with enough detail we can see the components and the soldering, and we'll see if we can spot any clues.

bonshates
 
Posts: 6
Joined: Sat Mar 23, 2013 1:35 pm

Re: 16x2 Blue LCD Kit for raspi, rPi doesn't boot

Post by bonshates »

1.jpg
1.jpg (58.15 KiB) Viewed 237 times
3.jpg
3.jpg (111.64 KiB) Viewed 237 times

bonshates
 
Posts: 6
Joined: Sat Mar 23, 2013 1:35 pm

Re: 16x2 Blue LCD Kit for raspi, rPi doesn't boot

Post by bonshates »

Just going through and testing pins that are next to each other looking for shorts. I found that the two pins below have zero resistance between them. Is that normal?
4.jpg
4.jpg (111.07 KiB) Viewed 234 times

bonshates
 
Posts: 6
Joined: Sat Mar 23, 2013 1:35 pm

Re: 16x2 Blue LCD Kit for raspi, rPi doesn't boot

Post by bonshates »

After testing all of the pins i scrapped off some of the soldering "slag" with my finger nail and that seems to fix the problem. It boots just fine now. Not sure where the short was but I must have fixed it with the scrapping.

Happy, happy, happy!

User avatar
adafruit_support_mike
 
Posts: 67446
Joined: Thu Feb 11, 2010 2:51 pm

Re: 16x2 Blue LCD Kit for raspi, rPi doesn't boot

Post by adafruit_support_mike »

In electronics, you learn not to argue with what works. ;-)

Glad to hear it's working for you. Have fun with it!

Locked
Please be positive and constructive with your questions and comments.

Return to “Glowy things (LCD, LED, TFT, EL) purchased at Adafruit”