These varistors were protecting a transformer when they died. The transformer was protected as the fuse blew – thanks to the varistors. Credit: bhungy
Tag Archive: fried
Jan
23
Xbox PCB charred
Two views of the same xbox board that not only lost the blue smoke but also lost the black smoke. Credits: Daniel Celion from Sweden.
Dec
14
Motherboard with badly damaged PCI slot traces
Credit: Anonymous
Dec
11
Varistor on UPS cracks
The burned part shown appears to be a MOV (Metal-oxide Varistor). The purpose of a MOV is to have a very high resistance until a certain voltage is reached at which point it will conduct current, in this case from “Hot” to “Neutral.” This property is useful for surge protectors. Original poster says this UPS …
Nov
27
Xbox power supply failure damages pcb
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 …