Are you using the same splitter as before? As I have said before, that splitter cannot work in your setup. It will not work in almost any setup. Your splitter can only work with one device at a time open. It will not work to connect a Blu-ray and a laptop together on one projector. It is not it's intended use.
Also, does that Panasonic Blu-ray work on
another monitor or projector using HDMI? U73 is not a "bad cable" error, it is an improper handshake/connection error. Either it is incompatible with your projector, or simply defective. Your splitter may have broken your HDMI output, and it is very likely, since your splitter is the wrong device for your application.
If you have only one projector and multiple devices, what you need to use is an HDMI
switch, not a splitter for your setup. Such as this:
HDMI Switch