Hi thanks for replying. I have an SE that I have cobbled together from a couple of computers. Been working great till about 2 weeks ago when the power supply glitched (needed the power connector to LB reflowed. Unfortunately it took out the 4MB of ram. Found 1MB of ram and managed to get it to reboot but the ADB no longer works and the mouse pointer is stuck in the top left hand corner. I tried known working mouse and keyboard but no go. I have 5V at both ADB ports and not sure what to test or replace next. Any thoughts or knowledge regarding another SE LB appreciated. Thanks