New Life Games Tech Forums

Hi. Does anyone know what causes the io lock light to go off indicating some kind of error on an NXT board? I was upgrading the memory on a working board and noticed that the processor was hot due to a non working fan. Replaced fan and after that no video and io lock indicator light is off. Put everyting back to original, but same error.
Any ideas. Promise to shoot myself if someone says the video board is blown.