Ive just plugged a 12v psu into a 5v kodi box. Got original psu but not coming on. Should it just be a capacitor thats blown, what one is it likely to be or could the box just be scrap now?
What are the markings on the three ICs closest to the power supply socket?
I'm not familiar with these boxes but it looks like there are a couple of voltage regulators there. The ten pin one is likely a linear regulator and the six pin one could possibly be a switching regulator as it has an inductor nearby. The 8-pin SOIC doesn't seem to have any capacitors near it and might not be a VR.
If you find out the markings on those and get the datasheets you can use a voltmeter to test them. Hopefully a failed one hasn't applied 12V to the CPU .