Was setting up my mod today (boards and wiring already installed by previous owner), but re-installing screen and bracket.

The MikeD rev 2 power board / controller is lighting up. However no LEDs are lighting on the Raspberry Pi, and it appears to be dead (certainly outputting no HDMI signal - I checked with a PS4 that the TV was able to receive HDMI).

Before I go and buy a new Raspberry Pi (which version is it?), I'd like to make sure the PSU power feed isn't the issue. If I go and buy USB charger, what do I need to get? 5V 3A USB Micro? Will a standard phone charger work?

If the separate PSU doesn't work and I know it's the Pi itself, will just connecting the new one up and inserting the SD card and USB stick make it work immediately, or do I need to do some setup?

Sorry for the cluelessness.

They're fine, but power isn't getting to the Pi board. Assume there's something wrong with the power / logic board thingy, as the Pi works fine with a mobile phone charger.

I'll likely be selling the kit though and waiting to see what Rappelbox comes up with.