HDMI Splitter or HDMI Y Cable? - AVS Forum
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post #1 of 8 Old 08-12-2013, 11:25 AM - Thread Starter
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So I need my computer's output to get displayed on two projectors. There will be no audio, just presentation. The projects are identical model. We bought a HDMI splitter and amplifier and it was working well for few weeks. Now, one screen always flickers or turns black. When we turn on the projector, there is the usual blue screen, when we plug in HDMI, the projector screen flickers for few seconds and then goes black. The other projector works fine. We swapped cables and the first projector started working but the other one stopped working. We tested the HDMI cables and the splitter ports and there seems to be no hardware issue. So it only wants to send signal to one of the projectors. We are using the same laptop and same projectors. I am thinking a simple HDMI Y cable should work but not sure. Do you think an HDMI Y cable will work in this situation? Or is there any way to fix the HDMI splitter issue? Is there any other cost effective way of doing this? Thanks!
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post #2 of 8 Old 08-12-2013, 11:52 AM
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Quote:
Originally Posted by abc1234567 View Post

I am thinking a simple HDMI Y cable should work...
Nope.

What splitter are you using? What amplifier?
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post #3 of 8 Old 08-12-2013, 11:56 AM
 
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Quote:
Originally Posted by abc1234567 View Post

So I need my computer's output to get displayed on two projectors. There will be no audio, just presentation. The projects are identical model. We bought a HDMI splitter and amplifier and it was working well for few weeks. Now, one screen always flickers or turns black. When we turn on the projector, there is the usual blue screen, when we plug in HDMI, the projector screen flickers for few seconds and then goes black. The other projector works fine. We swapped cables and the first projector started working but the other one stopped working. We tested the HDMI cables and the splitter ports and there seems to be no hardware issue. So it only wants to send signal to one of the projectors. We are using the same laptop and same projectors. I am thinking a simple HDMI Y cable should work but not sure. Do you think an HDMI Y cable will work in this situation? Or is there any way to fix the HDMI splitter issue? Is there any other cost effective way of doing this? Thanks!

Why would you think a "simple HDMI Y cable will work"? HDMI is a digital signal and has a bidirectional signal component called an EDID as well as HDCP handshaking. So a y cable would never work and would cause both displays to not work.

The correct method is a distribution amp (splitter) that you are using. That it worked for 2 weeks says it was a good solution. What changed? Did someone change a driver? Did any configuration items changed? How did you test the splitter? All black may mean an HDCP problem.

If it were me, I'd try a different brand/model of splitter as well as differnent High Speed HDMI cables. I'd also make sure that whatever splitter I was using has a wall wart (AC Adapter) and does not rely on power from the HDMI cables.
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post #4 of 8 Old 08-12-2013, 03:23 PM
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‘when we plug in HDMI’ – never a good idea to plug HDMI In (or Unplug) when any of your devices are powered On or in Standby.

In addition to confusing the underlying ‘Logic’ of HDMI and its buddies HDCP and EDID you run the risk of frying your HDMI ports.

A passive ‘Y’ Splitter is very unlikely to work for you.

Did you purchase a powered HDMI splitter or a ‘passive’ device?

How long are the HDMI cable runs to your Projectors?

What resolution is the Source set to?

Have you approached the HDMI Splitter Supplier/Manufacturer for Tech Support/requested a replacement unit?

Joe

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post #5 of 8 Old 08-12-2013, 05:00 PM - Thread Starter
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It's one box which says " StarTech.com 2 port HDMI Splitter and Signal Amplifier ST122HDMI2"
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post #6 of 8 Old 08-12-2013, 05:05 PM - Thread Starter
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Thanks for the replies everyone. I guess I"ll try with a different splitter and see if it works better.
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post #7 of 8 Old 08-12-2013, 05:46 PM
 
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That sounds like this one:
http://www.walmart.com/ip/17219085?wmlspartner=wlpa&adid=22222222227000983839&wl0=&wl1=g&wl2=c&wl3=13697059750&wl4=&wl5=pla&wl6=34452555190&veh=sem

USB powered so who knows that would happen if the USB did not supply enough umph.
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post #8 of 8 Old 08-12-2013, 09:23 PM - Thread Starter
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Quote:
Originally Posted by alk3997 View Post

That sounds like this one:
http://www.walmart.com/ip/17219085?wmlspartner=wlpa&adid=22222222227000983839&wl0=&wl1=g&wl2=c&wl3=13697059750&
wl4=&wl5=pla&wl6=34452555190&veh=sem


USB powered so who knows that would happen if the USB did not supply enough umph.

Nope thats not it. Mine had AC adapter.
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