Can be a hardware issue. Boards (at least some revisions) have small design "feature" that will make them unusable with some HDMI adapters. I have A6 revision and a Delock 63457<http://www.delock.com/produkte/G_65347/merkmale.html?setLanguage=en>HDMI adapter.
Now the HDMI adapter gets it's power from HDMI connector (+5V) through a resettable fuse PTC (noted RT1 on schematic, the yellow component near USB host connector). This excellent feature will protect PM (the *TPS65217*<http://www.ti.com/product/tps65217c>) against cheap chinese adapters or enthusiasts bad behavior through HDMI interface. The problem is the fuse which is under-estimated, on my board a 100mA PTC is mounted. Since *TPS65217* <http://www.ti.com/product/tps65217c> can handle a lot bigger, just replace the fuse with a 250mA one and you'll be ok. Better, remove the PTC and power the HDMI directlly through +5V main supply since there is the same +5V regulated and the kernel will anyhow put the device in standby if too long inactivity on keyboard or mouse will be detected. As a rule of thumb... if the PTC gets hot, the HDMI adapter tries to draw more power that fuse can handle. The voltage will drop under 5V and HDMI adapter will goes grazy... you will have a short image at boot time, then nothing. The board doesn't allow me to upload some pictures about issue. Regards, Edouard Gora, YO3HCV -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
