Display has just black screen

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Fleder
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Re: Display has just black screen

Post by Fleder » Tue Jun 14, 2016 1:32 pm

Usually the red cable is VIN. But as always, be safe and use a multimeter.
With VIN i do not mean Video Input but where you feed it with power (+).

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Re: Display has just black screen

Post by yves1984 » Tue Jun 14, 2016 1:43 pm

Fleder wrote:Usually the red cable is VIN. But as always, be safe and use a multimeter.
With VIN i do not mean Video Input but where you feed it with power (+).
the Red one is 5V (+)
the 2 blacks are Ground
and the yellow are Viedo

So u think i will need perhabs a wiring from the 5V (+) to one of the Legs?
perhabs i will try it tomorrow or find some solution online

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Re: Display has just black screen

Post by Fleder » Tue Jun 14, 2016 11:52 pm

This is not 100%. I just tell you what i have experienced on other boards.
Most of the time it works if you desolder the right IC and solder a wire from 5v to the right leg directly.
Take a look what leg outputs 5v. If you are careful, you can even resolder the IC, if it fails.
If not, you might damage your board. Be aware of that.

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Re: Display has just black screen

Post by drlbradley » Wed Jun 15, 2016 2:57 am

I used a Pololu 12V Step-up Voltage regulator (U3V12F12) to feed my screen 12v, easier than desoldering a tiny IC, and also made the image less 'stroby'

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Re: Display has just black screen

Post by yves1984 » Wed Jun 15, 2016 2:59 am

drlbradley wrote:I used a Pololu 12V Step-up Voltage regulator (U3V12F12) to feed my screen 12v, easier than desoldering a tiny IC, and also made the image less 'stroby'
Can u tel me the link where did u buy it?

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Re: Display has just black screen

Post by Fleder » Wed Jun 15, 2016 3:09 am

yves1984 wrote:Can u tel me the link where did u buy it?
http://www.exp-tech.de/pololu-12v-step- ... r-u3v12f12
It is pretty small. I have it in use, too.
Image

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Re: Display has just black screen

Post by drlbradley » Wed Jun 15, 2016 3:54 am

yves1984 wrote:
drlbradley wrote:I used a Pololu 12V Step-up Voltage regulator (U3V12F12) to feed my screen 12v, easier than desoldering a tiny IC, and also made the image less 'stroby'
Can u tel me the link where did u buy it?
I found one near you here (assuming you do live in Zurich) : https://nodna.de/STEP-UP-12V-Voltage-Regulator-U3V12F12
they only have one left..

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Re: Display has just black screen

Post by joe7dust » Wed Jun 15, 2016 4:46 am

drlbradley wrote:
yves1984 wrote:
drlbradley wrote:I used a Pololu 12V Step-up Voltage regulator (U3V12F12) to feed my screen 12v, easier than desoldering a tiny IC, and also made the image less 'stroby'
Can u tel me the link where did u buy it?
I found one near you here (assuming you do live in Zurich) : https://nodna.de/STEP-UP-12V-Voltage-Regulator-U3V12F12
they only have one left..
china
component separately
us supplier

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Re: Display has just black screen

Post by Fleder » Wed Jun 15, 2016 5:38 am

joe7dust wrote:china
component separately
us supplier
The first one is pretty big compared to the pololu.
The second one, i am pretty sure, is not suitable for this kind of task.
And the third one is a step-down module.

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Re: Display has just black screen

Post by yves1984 » Wed Jun 15, 2016 5:41 am

Fleder wrote:
joe7dust wrote:china
component separately
us supplier
The first one is pretty big compared to the pololu.
The second one, i am pretty sure, is not suitable for this kind of task.
And the third one is a step-down module.
i order the pololu one from ebay. will receive it next week and hope it will work ;)

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