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HDMI projector connection


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Setting up some simple projections using SCS...story so far

 

Set it all up at home working on a Dell E6330 (Windows 10) connected to my tv via HDMI, all looks good.

Get to theatre and laptop won't detect the projector (Epson G7000), projector shows 'no signal' when switched to HDMI input. Thinking it might be a power issue with the active cable, I tried with a short passive HDMI cable too and that didn't work.

Tried another (HP, Win7)) laptop via the 20m cable, works fine so projector seems OK.

OK I think, HDMI port on the Dell must have died, but when I take it home again it works fine via another 20m active cable into my telly.

 

I'm stumped! Any ideas gratefully received.

 

Eddie

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Some laptops need to be booted up with the cable plugged in and display device turned on otherwise they don't detect them. Always worth doing a reboot to check that.
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Maybe it's the colour-space.

 

Domestic TV's accept RGB and pro kit like the G7000 accept CMYK, some windows graphics drivers such as Nvidia have the option the change the colour space.

 

Failing that, perhaps it's the EDID that's causing the issue, an EDID emulator such as a parrot fixes that.

 

The Epson projector may have settings for all this, check the manual 1st.

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Thanks chaps. Certainly food for thought.

I’m wondering if the fact that the Dell doesn’t even recognise a connection to the projector does point to an EDID issue. Unfamiliar territory for me but always good to learn!

I’ve tried the obvious reboot etc and did take a driver update for the Dell too but to no avail.

Odd that the HP laptop plugs and plays seamlessly with both the Epson projector and my LG telly, whilst the Dell is fine with the tv but will not even talk to the Epson.

Both have Intel graphics chipsets if that’s relevant.

Busy with other stuff for a few days but I’ll keep playing and post a solution if I ever crack it

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What display resolutions are you trying to use? Try and force a commonly-used low resolution interlaced display in the first instance and make that work, then go to higher resolutions until it starts to fail. Some display driver software does allow the HDMI drive level to be changed as well which may be relevant.
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What display resolutions are you trying to use? Try and force a commonly-used low resolution interlaced display in the first instance and make that work, then go to higher resolutions until it starts to fail. Some display driver software does allow the HDMI drive level to be changed as well which may be relevant.

 

1920x1080 on the telly at home. As far as I can see, there isn't a way to change the resolution when connecting to the projector since it's not detected or recognised at all by the PC so I can't 'select' it to make any changes

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Both have Intel graphics chipsets if that’s relevant.

I have no end of trouble with Intel on board graphics not outputting the resolution they say they are. E.G. you set the driver to output 1280x800 but the receiving projector says it's getting 1024x768. A lot of faffing with other settings - refresh rate & fit mode - eventually gets there but it's a pain.

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Active Cables can get up to all sorts of tricks with the signal so not unknown for them to not work with some Laptops - having mini-HDMI Out on the Laptop could be another factor if you have an adapter in the system.

 

The HDFury DR HDMI is a good way to ensure the Laptop sees an active 'Sink" and allows you to decide what EDID you want the Laptop to see.

 

https://tmfsolutions.co.uk/product/dr-hdmi/

 

Joe

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I do mean CMYK

 

Sometimes it's referred to as YCbCr444 but my converter says cmyk/rgb on the switch

 

YCbCr is definitely NOT CMYK. YCbCr is a digital version of YPbPr which is a YUV colour space. Y is the Luminance (brightness) Cb and Cr (U and V) are the colour difference channels. The Y channel is calculated from the brightness of the Red, Green, and Blue channels, weighted for the eye sensitivity function (V lambda). Cb and Cr are the difference between Y and the blue and red channels. 4:4:4 means that there is no chroma sub sampling so each channel is at full resolution.

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Eddie - which G7000 Epson do you have?

 

I have an Epson EB-G6570 which has HDBT alongside HDMI Inputs. You can use an HDBT Transmitter direct to the HDBT Input on the Projector via a long CAT5/6 cable. I also have mine wired with one of our 30m RuiPro Hybrid Fibre HDMI cables and both connections work well.

 

Joe

PS CMYK is usually used when working on media for print where you are going to layer inks to achieve the required colour.

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It’s an EB G7000W.

Yes it does also have HDBT but I don’t have a transmitter.

I’ve since updated the Dell graphics driver but to no avail.

I have tried a Plugable USB to HDMI adapter and that works fine but that was borrowed so I’m running the show on the HP laptop.

Still baffled! It’s just that combo of Dell laptop and Epson projector that refuse to play together

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