Go ahead and do that, but if an MOV has melted it is likely you
suffered a surge big enough to damage the rest of the power supply.
You'll need to decide if it is worth replacing parts, so initially
just remove the remains of the MOV and power it up again.
The next parts to test are the bridge rectifier and large electrolytic
capacitor. After that it gets a bit more specific and impossible to
diagnose at a distance.
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