so i have a broken chumby classic (ironforge 1.8: http://files.blueocty.com/hdwedocs/IRONFORGE_MX21_V1_8_FINAL.pdf ). in some sort of fashion, there was a short in a power rail somewhere (i suspect DC in and ground, but i'm not sure if so, or if that was indeed the root cause) which blew a diode and some buck regulators. i have now replaced all those parts and checked that all voltages (5v, 3v3, 1v8) are correct and the unit does power on however never functions beyond a white screen
spitballing appreciated 
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i realize how likely it is that voltage sensitive parts such as CPU, RAM or flash are probably cooked. but i'd really like to bring it back if at all possible
