Weird "No Signal" video

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1

Hello and HAPPY NEW YEAR to all !!
I would like to congrats all that are doing a good job on the BB,
especially Robert Nelson for his good scripts and documentation.

I have an annoying problem since yesterday.

I have a BeagleBoard Rev C3, 3 monitors and 1 TV.

-NEC 15" (DVI)
-LG 15" (DVI)
-HP w2408h (HDMI)
-HDTV LG 37" (HDMI)

I have always used my BB with the NEC 15" and with the TV for a long
time.

Since yesterday I have "no signal" on the NEC, but the BB is loading
the OS (can see it on with the serial cable).
I tried to plug the BB on the TV directly connected to the HDMI
(nothing between) = No Signal.
I tried on the LG 15" : No signal.

I only have the video with the HP w2408h. The video is correct. no
problem.

I also own 3 SD cards with Ubuntu Lucid, Maverick, Natty. I tried
different resolution : 1024x768, 1280x700...

There's nothing on the screen, there is not the orange screen :
nothing.
I don't understand what happened, I was using the BB a lot those last
days on the NEC 15".
I have done a lot of test : it's only working with the HP w2408h.

This is really annoying.
I tried to search on this group but nobody seems to had this problem.
Regards

2

Here is more information:

When I start the Beagleboard on the working monitor (HP w2408h)
When I power on the Beagleboard on the orange screen (640x480), (I
guess that's before de boot.scr)
It display those frequencies : H=51,6KHz V=65Hz

So, as I said in my previous post, the image is clean...if my boot.scr
resolution is 1024x768.
In this case the frequencies are : H=45,9KHz V=57Hz

But if the resolution in the boot.scr is set to 1280x700, the screen
has some glitches (see picture : http://dl.dropbox.com/u/1566495/BeagleBoard/IMG_2248.JPG)
and the frequencies are : H=42,8KHz V=58Hz

I never tried stupid things with my BeagleBoard, It has always been
powered with a +5v PSU (I'm going to check the output with an
ohmmeter).

Any help is appreciated.
Regards

3

After a conversation with Robert (thanks again), I know what happened:
The DVI has been unplugged accidentally while the board was powered
on, I'm sure about that, after this it has never worked correctly.

Robert gave me that link :
http://groups.google.com/group/beagleboard/browse_thread/thread/908cb8c231c2ff37/aae1dcf2f155eaa8?lnk=gst&q=tfp410+issues#aae1dcf2f155eaa8

Can it be taken on warranty ?

4

Request and RMA.

Gerald