Projector / baluns / Sky troubleshooting
Discussion
Trying to help a friend troubleshoot an issue he has just started having, and hit a brick wall.
His setup:
A SkyHD box feeds an Onkyo TX-SR605 amp over HDMI.
The HDMI output from that then goes into an HDMI splitter, where one HDMI output goes directly into a TV, the other HDMI output goes through a pair of Cat5e baluns to a Themescene projector.
This setup has worked perfectly for a year or more, but now the projector claims to receive no signal.
If you bypass the Onkyo amp and the splitter and plug the Sky box directly into the balun for the projector, it works fine. If you pass the Sky output through the amp, then direct to the projector, no signal is received.
The amp shows when it is negotiating/negotiated HDMI and the symbol lights up for either Sky or PS3 (both behave the same way) but nothing gets to the projector, so the issue appears to be with the amp. However, I swapped it for a brand new Onkyo TX-SR578 and the same problem occured - bypass the amp and it works, go through it and it doesn't.
Any ideas, chaps?
His setup:
A SkyHD box feeds an Onkyo TX-SR605 amp over HDMI.
The HDMI output from that then goes into an HDMI splitter, where one HDMI output goes directly into a TV, the other HDMI output goes through a pair of Cat5e baluns to a Themescene projector.
This setup has worked perfectly for a year or more, but now the projector claims to receive no signal.
If you bypass the Onkyo amp and the splitter and plug the Sky box directly into the balun for the projector, it works fine. If you pass the Sky output through the amp, then direct to the projector, no signal is received.
The amp shows when it is negotiating/negotiated HDMI and the symbol lights up for either Sky or PS3 (both behave the same way) but nothing gets to the projector, so the issue appears to be with the amp. However, I swapped it for a brand new Onkyo TX-SR578 and the same problem occured - bypass the amp and it works, go through it and it doesn't.
Any ideas, chaps?
Have tested the cable and baluns by plugging the HDMI output from the Sky box directly into the balun and it works fine on the projector.
Only when you go SkyHD -> Onkyo amp -> balun -> projector does it stop working.
So, to me that means that the cabling and balun is working fine, no?
Only when you go SkyHD -> Onkyo amp -> balun -> projector does it stop working.
So, to me that means that the cabling and balun is working fine, no?
Cable and Balun could well work ok with a direct connection, but it is the losses / noise that is added by the other, added items that is tipping you over the digital cliff or working or not working.
This is why Digital is so risky, without looking at the digital signal on an analyser there is no way of knowing how close you are to the fail point of the link.
It could be that you are a Gnats Chuff away from failure, but it has worked until the degradation of the system reached that critical point.
V.
This is why Digital is so risky, without looking at the digital signal on an analyser there is no way of knowing how close you are to the fail point of the link.
It could be that you are a Gnats Chuff away from failure, but it has worked until the degradation of the system reached that critical point.
V.
Check the PSU on the splitter, these splitter can often pull 5v from the supplying HDMI device and work to an extent if their own psu is either off or faulty. I had this exact same thing last week on one of our shop displays, everythig worked except the cinema room feed, it was because the splitter was turned off but it was getting a supply from its hdmi input regardless of the switch position so appeared to be on.
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