Sjc

I own a 2014 RX350 and recently my monitor does not turn on., not even the lexus logo nor the backup camera. I dont have navigation on the car. Does anyone have a wiring diagram which shows which of the leads (of which there are many) are the power supply and ground so I can troubleshoot to see if the monitor is not working or something up stream. Ive checked fuses and they are all good...thanks in advance..