This is a little off topic, but since I discussed the monitor blanking issue on my photobooth a few comments back, I thought I would put an update here.
I got the new HDMI to VGA converter installed and the screen hasnt blanked off yet, but now I have another issue.
The HDMI-VGA box has power fed from the arcade cabinet power supply Im using.
The 5 vdc is turned on and off by a relay, and the relay turns off when the power from the RPi goes off.
I am using a mausberry circuit to shutdown the RPi, it issues a shutdown command to the Rpi, when RPi is shutdown, the mausberry circuit turns off the power to it.
Now Im seeing where the Rpi is shutting down, but power is staying on (Orange light on RPi stays on.)
This keeps the relay turned on, which keeps the power turned on to everything else, including the HDMI-VGA converter (box).
If I unplug the power to the HDMI-VGA box, the pi turns off completely. Relay turns off, monitor and speaker amp turns off.
So I gather from this that the HDMI-VGA box is back feeding 5 vdc to the RPi.
I dont like this. From what I gather on the net, there should be a device on the RPi that blocks back flow from HDMI to RPi.
So either this device has failed, allowing power to pass in both directions, or something else going on.
I just dont know why the old box didnt act this way, unless maybe the power socket for it was broke, not allowing power to flow from the relay to it?
May be why it still blanked monitor even with external power plugged in.
My next step is to test this on another RPi I have in my genesis console conversion.
If it acts ok on that one, I either need to cut the wire in the cable that supplies 5 v between the RPi and the box, or just buy a new RPi.
I think I will probably go with a new RPi, since the power jack on this one is screwed up anyway, and Im not crazy about cutting into a HDMI cable.