Puppy Linux Discussion Forum

[Lobster]

[don570]

There's a nice video of the delivery of the computers.
http://www.itv.com/news/central/2012-04-12/customers-to-get-their-first-taste-of-raspberry-pi/

____________________________________

[Lobster]

Thanks don570

Every morning I sit like a good Puppy
fangs ready to tear apart the packaging
that may contain even a ripple of raspberry.

Join our raspberry pi blog (apply to be a co-blogger)
http://raspberrypy.tumblr.com/

[humblesoul]

http://www.bbc.co.uk/news/technology-17703852

[Lobster]

Raspberry Pi arrived.

Problem 1 – there are two sorts of micro USB and I had the fatter one – wrong

Problem sorted (friend came with 5v 1A supply) and slim micro USB


Problem 2 – No signal on TV

Tried two different HDMI cables, checked they were 1.3 and above, they were

Tried two different SD cards (one with Debian and one with Fedora) still 'no signal' message on TV. Tried RCA cable – no signal.


What to try next?

[Aitch]

Lobster

I hope you are using hdmi to hdmi for your video tv i/p, as converter cables don't work!

You could get video w/o sound via the composite phono o/p to a scart to phono adapter in the back of most TVs, but hdmi is a complex digital video plus stereo mix with proprietary protection built-in....converter cables need a digital decoder of sorts, and are probably dearer than the pi itself...

Else try an hdmi to DVI converter cable with a monitor...again, no sound

new toy, new problems

Aitch

[Dave_G]

Lobster

Check your config.txt file on the SD card.
See here:
http://elinux.org/RPi_config.txt

You will have to add the following lines for "RCA" output:

SDTV_MODE_PAL = 2, /**<Normal PAL */
SDTV_ASPECT_4_3 = 1, /**<4:3 */

and possibly delete the one/s with any reference to HDMI_
or the other way round if you want to use HDMI.
(Don't know if the Pi can give out composite and HDMI video simultaneously, I suspect not).

Be wary of HDMI as not all sets can handle all HDMI resolutions
and always use HDMI input number 1 when testing if your set
has more then one HDMI input.

Hope it helps.
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[antiloquax]

[Lobster]

Non working pi colours me raspberry . . .

[Dave_G]

Since you have no video output, are you 100% that the Pi is actually booting?

If so, double check your config.txt file.
Look at the different HDMI resolutions available at the site
I previously posted a link to.

Best to choose a resolution in the middle of the range, say:

HDMI_CEA_720p50 = 19,

and avoid the ones that use 1080 for now.

The reason I say always use input 1 on HDMI, is that some sets seem to
have a problem reporting their capabilities to hosts when interrogated
on the other HDMI inputs.
By default Pi interrogates the HDMI set to see what it's capabilities are
then I assume it sets the port to maximum resolution that the set can handle.
This can be over-ridden by specifying a specific resolution in the config.txt file.

[aarf]

[Dave_G]

Lobster

Also look here:
http://elinux.org/RPi_VerifiedPeripherals
scroll down to the section on SD cards for a list of compatible SD cards and those that don't work.

Apparently not all SD cards are created equal.
Also see here:
http://www.raspberrypi.org/forum/general-discussion/class-10-sd-cards-on-the-production-boards/page-3#p39181

[Lobster]

Here was the Raspberry Pi this morning residing on a cushion surrounded by a lime hub and being offered appropriate nutrition after its journey from Cambridge . . .

Lobster being grilled by Raspberrians
http://www.raspberrypi.org/forum/absolute-beginners/no-signal/#p63957

I am a bit loath to edit the Debian SD card just yet . . .

[Dave_G]

Lobster

Are the led/s as described by the guys over at the Pi forum on?
Can you connect a network cable to the Pi to see if the Lan led comes on?

Have you checked that the stuff that is supposed to be on the SD card
really is there and if you can see /boot/config.txt when the SD card is connected
to a PC running Puppy?

Judging by what the guys over at the Pi forum describe, have you tried
the suggestion of not connecting the HDMI lead and using only the RCA?

If the rest of the family are taking over the TV set and you
want to carry on testing, then you can always connect some amplified
PC speakers to the RCA jack of the PI's video output.
Yes, you read that correctly, connect the video output of the Pi to a set
of speakers which have a built-in amp (not just passive speakers), turn
the volume right down, boot the Pi then slowly turn up the volume.
If you hear a raspy, regular buzz/noise then you have video.

This is safe to do as composite video is 1 volt peak to peak into 75 ohms
where as line level audio is around 1.5 volts into a higher impedance.
Since amplified speakers have an input impedance much higher then 75 ohms, it can't overload the Pi's video output.

This trick also works with 32 ohm headphones (not the 8 ohm types).
Here the impedance is about half the required 75 ohms but still not low
enough to cause any damage.

[Dave_G]

Now that you have posted that pic, I think I know what your problem is.

Apples, blackberries and raspberries don't mix.