Why is it not turning on and no hdmi signal on tv?

I tried to plug my ps4 on a monitor with no hdmi input using a vga to hdmi cabel and a hdmi converter box it sad that I needed to plug aditional power to the hdmi converter box but instead of pluging a 5 volt power supplier I plugged a 20 volt supplier and smoke came out from the hdmi convert box so im wondering what could gone wrong in the ps 4 and what part do i need to fix?