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I bought a Beagleboard xm. It comes with a micro SD card containing a demo program. I connected Hdmi to dvi converter and the monitor. I was supposing to see a welcomescreen when I connect the power cable. But nothing appears on the screen and the monitor goes to sleep.
How should I proceed?
There can be quite a number of things that might have gone wrong. A faulty SD card, a faulty board, some left-over u-boot build in NAND flash, etc.
Your best bet at diagnosing the problem is via the serial console. To access the console, you’ll need to build a serial cable – there isn’t one included AFAIK. For the details of the cable, check out BeagleBoard System Reference Manual.