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Topic: Optoma EP739 signal loss
Joined: Jul 9, 2014
Posts: 2
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Hi - New to the forums.
I recently acquired an Optoma EP739 (
Obviously the projector is old, but I am using it to make my first venture into home projector use.
I have no trouble using it with my laptops with either VGA or HDMI to DVI-D cables. I have also been able to connect to my Dish Network receiver using HDMI to DVI-D cable with no issues.
However, when I connect to my DVD/BluRay player and attempt to project a DVD with the same HDMI to DVI-D cable the signal does not come through. The source is identified and it states the resolution is 1920x1080 but I think it says signal loss or something like that and it basically projects static/snow.
As I know the projector can only handle up to 1024x768 I tried switching the resolution of the BluRay player from 480i/p to 720i/p to 1080i but had no luck.
Any ideas or input (other than get a new projector!) would be much appreciated.
Thanks in advance!
Joined: Mar 28, 2005
Posts: 12,012
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The projector very well could handle all standard HD resolutions including 480p, 720p, and 1080i over the DVI connection, but in cases like this it almost always is a HDCP issue.

This is more or less a pretty bad thing to run into, but I would first and foremost ensure that firmware is updated on your player. What type of player are you using with that projector?

At the end of all of this, I would blame Optoma for the projector not being up to speed on this, but considering the 10 year old design, it really doesn't surprise me.

If you can pick up a older Blu-ray Disc player with component video output, you could still get really solid quality using the component video connection. Or, you can just go with a laptop hooked up to play back discs.
AV Integrated - Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.
Joined: Jul 9, 2014
Posts: 2
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Thanks for the reply. I discovered that the problem (I think) was the blu ray player pushing 1080p to the projector. I can get around this by switching the resolution output to 720p or 1080i in the player. The tricky thing was discovering that I have to do that before inserting a disc for some reason. If the movie starts to play, I can't adjust the resolution. I have to do that on the player's home menu with no disc inserted...
Using the auto resolution does not account for the fact that the projector can't take 1080p and I guess the projector can't automatically convert the incoming signal. Since the player defaults to the auto resolution setting I have do this each time I want to project a movie, but its not that big of a pain.
Anyway, thanks!