Odroid-C2 display flashing

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Diigiit
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Odroid-C2 display flashing

Unread post by Diigiit » Wed May 18, 2016 4:04 am

Hello,

I am posting here on behalf of one of our customer that does not speak English. Here is experiencing problems with its Odroid-C2 board. He still have the board in hands. As requested, we post of Odroid forum for your investigation. Board seem to be faulty.

He's got an Odroid-C2 rev.2 20160226. This is the second batch of Odroid-C2 (without ground wire solved between USB port and HDMI port).

Customer does not have a stable display; HDMI output seems to go on and off.

He has tested the product with 4 different HDMI cables and two monitors (Samsung UE40D8000 full Hd with 4 HDMI ports and another display). He has never been able to solve the problem. Same setting works with Raspberry PI and Radxa!

He did test with official eMMC Black Edition without success as well as with miscellaneous Class 10 microSD card (16GB, 32GB, 64GB) with Odroid image without success (Android Lollipop v 1.5). He has used different micro USB cable (5V 2A) to power the board without success too.

He is not able to use its bluetooth mouse too when screen is flashing.

Do you have any suggestion?

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Re: Odroid-C2 display flashing

Unread post by odroid » Wed May 18, 2016 11:29 am

1. Set 1080p/60hz mode with Odroid-utility.

2. Try the Ubuntu image and let us know the result.

If it shows the same result with above two tests, the HDMI interface circuit could be damaged.

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Re: Odroid-C2 display flashing

Unread post by Diigiit » Sat May 21, 2016 2:38 am

Customer did try solution 1. Despite the fact that Odroid-Utility does not launch every time, changing resolution does not change anything. He did try with many resolution except the one you have specified that is not available on his side. He also tried to update Odroid-Utility without success. Please see URL below for images:
http://www.forum.diigiit.com/viewtopic. ... 1308#p1308

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Re: Odroid-C2 display flashing

Unread post by mrchip » Sun May 22, 2016 12:04 am

I would suppose, that there is a problem with the power supply (monitor, Odroid board or both).
I seems that there is a kind of electrical disturbance on the power grid, which could lead to such effects.

1. Have you any power hungry devices running, which are powered from the same power grid? (like washing machine for example)
2. Have you tried to power the board from DC input?
3. Have you tried to power the board from another power grid? (another room or another house)?

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Re: Odroid-C2 display flashing

Unread post by Diigiit » Mon May 23, 2016 12:53 am

Hello mrchip,

Customer has tried to power the Odroid-C2 board with USB power supply (5 different models) or with a wall adapter power supply (5V, 2A). He did tried many power grid without any success. His Radxa, Raspberry PI2 and PI3 boards have no problem in similar conditions. He has tested on a Samsung UE40D8000 TV as well as on a DELL monitor. It does not change anything.

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Re: Odroid-C2 display flashing

Unread post by mrchip » Mon May 23, 2016 1:38 am

well, then I would try another odroid c2 board with the same conditions.

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Re: Odroid-C2 display flashing

Unread post by odroid » Mon May 23, 2016 12:09 pm

Also try the Ubuntu image to narrow down the root causes as I told you.
http://odroid.com/dokuwiki/doku.php?id= ... _note_v1.1

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Re: Odroid-C2 display flashing

Unread post by Diigiit » Fri May 27, 2016 9:37 am

Customer just tried Ubuntu image ubuntu64-16.04lts-mate-odroid-c2-20160204 on 5 differents microSD card. Nothing is working. Power LED is red and nothing appears on monitor.

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Re: Odroid-C2 display flashing

Unread post by odroid » Sat May 28, 2016 10:55 am

If there is no blue LED light after proper flashing OS process, the board could be a defective.
Proceed the RMA.

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Re: Odroid-C2 display flashing

Unread post by rubensx » Wed Mar 25, 2020 12:02 pm

I have exactly same trouble in samsung tv (same model but 46”).

The blue light goes ok but the intermittent pulse are changing...

When the logo of “hardkernel” appears the image gonna flickering and only stabilize when I go to android apps menu!

The image stops flickering (on - off - on -off tottaly) when in odroid utility

I’m using power supply 5v 2a, changed to a usb in a apple ipad power adapter (15a) and only a mouse in a usb and ethernet plugged

Has a 64g emmc too

This board are stored in my desk over a year without use and the last powered are all fine...

I’m worry about maybe I brick my c2 for non use 😪

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Re: Odroid-C2 display flashing

Unread post by odroid » Wed Mar 25, 2020 3:15 pm

@rubensx,
Please don't hijack.
Create a new topic after flashing this OS image.
https://wiki.odroid.com/odroid-c2/os_images/ubuntu/v3.1

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