This Xbox had one issue of being placed in a different case and shorting. I replaced the faulty 2T transistor and all was working. Voltages were normal on all rails. I then was getting glitchy video on composite cable so I changed the large caps on the board and the video issue went away. It powered on and work fine all day. Even would power cycle multiple times without issue and run stable with any game I threw at it or just stay running for hours. The next day it would not power on at all. I changed the two large output caps on the PSU and reseated the modchip and it booted and ran perfectly so I played Doom3 for a few hours without issue. Shutdown normally. Next day it would not power on again.