Raspberry Pi Forums

Posted: **Sat Feb 16, 2013 11:03 pm**

Apologies for a basic post, but I just got a Model B and can't boot it up for the first time.
I have a 4GB SD card and am using a HDMI-DVI cable. The mouse and keyboard are connected via USB. I used win32-image-writer to prepare the SD card, which looks OK when I view the files on a Windows computer (it has about 12 files, including start_x, bootcode etc).
The red power light on the R-Pi comes on, and the green light blinks for a few seconds, but I can't see anything on the monitor.
Any help appreciated.

Posted: **Sun Feb 17, 2013 4:08 am**

Very well could be that the video is going out the composite port instead of the HDMI port. The Pi will try to detect an HDMI device and if it doesn't see one, it redirects video to the composite port. That happens with the HDMI to VGA converters and very well might be the same for the DVI converter. Try the composite output first just to make sure. Are you using Raspbian Wheezy? Check your boot directory for the config.txt file. In there you can uncomment the line "hdmi_safe=1". That will force the video to the HDMI output and set the resolution to 640x480. If that works, then you can custom set the resolution by re-commenting the hdmi_safe line and setting the following lines:

Code: Select all

framebuffer_width=1366
framebuffer_height=768
hdmi_force_hotplug=1

That will force the HDMI output (the hotplug line) and the other two lines set the desired resolution (mine is set for 1366x768).

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