Quote Originally Posted by sirkosero View Post
Yung friend ko 3x na pinalitan ang main board ng carrier nya. Bigla na lang nasira.

Im guessing baka nagka voltage spike sa kanila kaya nasusunog ang board

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It's likely they're not properly grounded.

All power supplies have built-in voltage suppression circuits.... it's the standard. However, these circuits only work when there's a path to ground to dissipate the energy. If there's none, this surge will look for the path of least resistance... going through fragile silicon transistors and ICs until it dissipates.