How to Fix the dim LCD backlight or not showing an image

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Helder
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How to Fix the dim LCD backlight or not showing an image

Post by Helder » Sat Jul 22, 2017 5:10 pm

So I ran into the same issue some people had with the LCD turning on where the back light was very dim then no image showed. I tested voltage and it was 2.5v where it needed to be 3.3v and it ended up being a bad Ground on the 8pin connector on the PCB. If you have this issue a simple fix is to link the 2nd pin to the GND pad below the connector like the image below.

Image
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Re: How to Fix the dim LCD backlight or not showing an image

Post by Orangebuster » Sat Jul 22, 2017 6:38 pm

Thanks for this solution Helder. I was having this issue and I linked the second pin to ground, but nothing still shows up on the screen

EDIT: okay, so it had something to do with the ribbon cable being in juuuuusst right.
Last edited by Orangebuster on Sat Jul 22, 2017 7:20 pm, edited 1 time in total.

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Re: How to Fix the dim LCD backlight or not showing an image

Post by Robochris » Sat Jul 22, 2017 6:57 pm

Maybe off topic but is there a test pad for the gpio pin labeled "D/C"?

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Re: How to Fix the dim LCD backlight or not showing an image

Post by Orangebuster » Sat Jul 22, 2017 7:12 pm

Yeah it's in the middle of the line of test pads, next to rst and sdi

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Re: How to Fix the dim LCD backlight or not showing an image

Post by Robochris » Sat Jul 22, 2017 7:16 pm

Oh shit. Thanks.

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Re: How to Fix the dim LCD backlight or not showing an image

Post by L51 » Mon Jul 24, 2017 1:58 am

I am also having this problem. I just solder some wire to join the pin correct?

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Re: How to Fix the dim LCD backlight or not showing an image

Post by Helder » Mon Jul 24, 2017 2:55 am

Yes just like the image on the first post.
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Re: How to Fix the dim LCD backlight or not showing an image

Post by Helder » Mon Jul 24, 2017 5:55 am

No that one has some changes made around that area from the final version. I looked at the board files and the gnd there shouldn't have had an issue but little faults are bound to happen in a large production run. I'm just glad it happened to me so I could document it and the fix.
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Don't support thieves like ckliang who copied my AIO to resell and is now cloning the mintyPi, support the original creators and not the thieves!

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Re: How to Fix the dim LCD backlight or not showing an image

Post by L51 » Tue Jul 25, 2017 5:04 am

Will there be a second revision where the screen works straight outta the box because mine going in the bin

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