This appears to be an Xbox revision 1.1 where the power supply failure caused significant damage to the PCB. The vented capacitor in the picture is a 680uF/16V capacitor which shorted, damaged the FET, and led to the failure of the power plane. Ideally the power supply should sense failure conditions and shut down. The FET was a Philips 21N06. Credits: Ahmad Tabbouch of http://ultrakeet.com.au.
DP-40205 top
Exploded FET
These pictures come from a Dynapower USA DP-40205 400W power supply. It appears the standby regulation failed and took out the FET pictured above and also the capacitor and resistor near the top of the fan. The exploded piece of the FET was rattling around the power supply when it was opened and the part that remained on the board was loose. It’s suspected the capacitor damage was from overvoltage when the regulator failed for unknown reasons. Credit: http://blog.kevtris.org/
MAG LT716s front
MAG LT716s back
Closeup of fried FET
The capacitors in the first picture are failing as can be seen by their bulging. They are supposed to hold the electric charge for the inverter circuit using the 4511GM FET ICs shown above. Once the capacitor cannot hold its designed charge, the BIT3193 PWM controller in the middle of the bottom picture tells the FETs to try harder to maintain the output voltage on the capacitors. Apparently the controller had no protection for this type of scenario and drove the blown FET to the point that it melted the solder it was connected to the board with and damaged the top of the PCB. Credit: http://reboots.g-cipher.net/
This picture comes from a Mitsubishi Diamondview 24″ monitor. An insect came in contact with the CCFL output of this inverter and was charred to a crisp. This lead to arcing on the board which destroyed the PCB and the inverter. Credit: PodeCoet.
Multiple blown capacitors are shown in this DVD player’s PSU. Credit: http://www.flickr.com/photos/barsk/ / CC BY-NC-SA 2.0