Wrong colors with VGA on A20-OLinuXino-MICRO

Started by slp, February 28, 2014, 04:47:45 PM

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slp

Hi,

I'm testing the VGA output of the A20-OLinuXino-MICRO (I've bought the A20-VGA-CABLE), and I'm having problems with the colors. It looks like it lacks a bit of red, something similar to what happens when you have a faulty VGA cable:

http://imgur.com/GPRVwCI

As reference, this is how it looks with HDMI:

http://imgur.com/HCEuvvz

I've tried with various cables and monitors with identical result. Is this something expected, or is there something wrong with my board and/or A20-VGA-CABLE?

Thanks!

hkramski


slp

Quote from: hkramski on March 01, 2014, 12:33:35 AM
The VGA adapter works fine here.

Thanks for the feedback, I suppose I should request a replacement.

LubOlimex

Hey slp,

To me it seems more like red and blue are somehow tied together.

The VGA output is tested on a VGA monitor with a color recognition table on the screen but anything can happen after a board is shipped.

From the information you have provided so far, I think the problem might be:

1. In the VGA monitor (probable short-circuit near the VGA connector).
2. In the VGA adapter cable (probable short-circuit of blue and red signal lines).
3. In the A20 board (probable short-circuit of blue and red signal lines).

Best regards,
Lub/OLIMEX
Technical support and documentation manager at Olimex

felipegn

Hello.

I know it's been a long time since you created this post and sorry to bring it up.

I am having trouble to connect my VGA cable into my Olinuxino.
Could you explain to me how you did it?

When I connect my Onlinuxino to my monitor via VGA I get only a black screen with a white cross on the center.
I tried to use the change_display script but it doesn't resolve my problem.

Thank you.