Low HDMI signal issue

[The Daywalker]

Hello everyone,

I've been troubling with an issue over a week by now,

Let me explain it simply:


I'm connecting 4 LED Televisions to my graphic card using a 4 Port HDMI Multiplier.

The problem I'm experiencing is bad image quality (random red dots and lines on the TVs) and even signal loss for a few seconds. (TVs get the blackscreen then come back again)

The distance between my PC and HDMI Multiplier is 30 meters. I'm using 30 meters HDMI cable.

But please do NOT think this is the problem - because the weird thing is, I tested the same cable and the same HDMI multiplier with a simple ($50-cost) DVD player AND with a HD Satellite Reciever and they both worked perfectly fine (1080i @50Hertz)

I tried everything that I could think of. For example:

1) I tried to set the display hertz down to 23 hertz on Windows, didn't fix. (Well, more than 30Hertz will never show up on TVs anyway)

2) I set the color scale to 16bits instead of 32bits - didn't help.

3) I tried to replace the 30 meters HDMI cable with an HDMI Extender (that uses 2 CAT6 cables and has 60 meters range) but it did not fix my issue either. (I used high quality FTP CAT6 cables)

Howcome a single (cheap) DVD Player or a Satellite reciever can have stronger HDMI output signal than a powerful graphic card that costs more than $150 itself ? Or where am I doing wrong ?

For additional information, here is my PC specifications (you won't believe it!)

MAINBOARD: ASUS Maximus VI Extreme Z87
CPU: INTEL Core i7-4770K 3.50 GHz
RAM: 2x 2x8GB KINGSTON HyperX KHX16C10P1K2/16 (32 GB total)
HDD: 2x Kingston SSD 120GB (Raid 0)
PSU: HIGHPOWER Element Smart (HP-EP-750S) 750W 80+ Bronze 14 cm FanPOWER
GPU: 2x POWERCOLOR Radeon HD6790 1 GB GDDR5 256 Bit

 

[mouse24]

Have you tried it with just the cable connecting from the gpu to the monitor without the 4 port hdmi splitter there?

 

[The Daywalker]

Have you tried it with just the cable connecting from the gpu to the monitor without the 4 port hdmi splitter there?

Yes, it fixed the problem but I need to use the HDMI switch because I need all 4 TVs running.

But if you say that the HDMI switch is the problem then why the same switch works fine with the DVD Player or Satellite Reciever?

 

[mouse24]

Have you tried it with just the cable connecting from the gpu to the monitor without the 4 port hdmi splitter there?

Yes, it fixed the problem but I need to use the HDMI switch because I need all 4 TVs running.

But if you say that the HDMI switch is the problem then why the same switch works fine with the DVD Player or Satellite Reciever?

Hmmm, what do you need the monitors for? You might be able to get by with adapter cables.

 

[The Daywalker]

Have you tried it with just the cable connecting from the gpu to the monitor without the 4 port hdmi splitter there?

Yes, it fixed the problem but I need to use the HDMI switch because I need all 4 TVs running.

But if you say that the HDMI switch is the problem then why the same switch works fine with the DVD Player or Satellite Reciever?

Hmmm, what do you need the monitors for? You might be able to get by with adapter cables.

With all my respect, sir, I don't think this question has anything to do with my problem. I just need all those 4 Televisions up and running. This is a cinema theater foyer and 2 of them are inside the foyer and 2 of them are at the terrace side. And we need to have the movie trailers playing all the time.

Doesn't it sound weird that a strong PC can not do what a simple DVD player can do? There MUST be a way. There MUST be something I'm doing wrong.

 

[mouse24]

Have you tried it with just the cable connecting from the gpu to the monitor without the 4 port hdmi splitter there?

Yes, it fixed the problem but I need to use the HDMI switch because I need all 4 TVs running.

But if you say that the HDMI switch is the problem then why the same switch works fine with the DVD Player or Satellite Reciever?

Hmmm, what do you need the monitors for? You might be able to get by with adapter cables.

With all my respect, sir, I don't think this question has anything to do with my problem. I just need all those 4 Televisions up and running. This is a cinema theater foyer and 2 of them are inside the foyer and 2 of them are at the terrace side. And we need to have the movie trailers playing all the time.

Doesn't it sound weird that a strong PC can not do what a simple DVD player can do? There MUST be a way. There MUST be something I'm doing wrong.

So you absolutely need to use the HDMI splitter? You can't say use a DVI to HDMI cable then clone the displays? Thats what I was thinking.

What resolution/hz are you running the displays at, it might be a bandwidth problem with the device. (I know you said that with the receiver/dvd player it was running at 1080i @ 50hz but you said nothing about what the PC was outputting.)

Also what splitter are you using specifically?