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topcaser
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Radeon HD 2600 XT, problems with no signal on HDMI cable? - 2007/08/19 08:25 Hi, I have got a problem with the new Radeon HD 2600 XT series together with my LCD LB2R during boot, connection with HDMI cable, DVI-HDMI adapter is fully connected. But since the beginning, I the installed Sapphire Radeon HD 2600 XT and connected a HDMI cable to it and to my monitor. You know the splash screen of the BIOS, detecting IDE devices... And that kind of stuff at the beginning of the boot? I can not see this. Instead my monitor says, no signal. I booted up Windows but again no signal. I switched off the PC and connected another cable to this card, a S-Video cable.

And I got all the messages at the beginning of the boot again via this connection and was able to install drivers for this card. Good... I did a reboot disconnected the S-Video cable and connected the HDMI cable again. but again no splash screen messages at all. First as Windows started up and loaded the drivers the no signal message disappears and the monitor worked correctly. Then, I installed another card in the system, a Sapphire Radeon HD 2400 XT and with this card the splash screen was visible. Things were very good.

Now I have bought another card, the Palit Radeon HD 2600 XT. And it is the same as with the Sapphire Radeon HD 2600 XT. First as I had not installed any drivers at all, I did not get any signal to the monitor, during boot and during normal Windows operation. Had to connect a S-Video cable, install drivers, connect HDMI cable again and no splash screen but Windows works correctly as soon as the drivers are loaded...

It is very odd. But I think, it is the graphics card which has saved in its BIOS a resolution and/or frequency combo which the LCD don't understands. The question is, am I able to adapt this? Where do I have to look for this issue? I have read at the NVIDIA guide you posted on this site, that there are some switches for debugging. Are there any for ATI, too? Isn't it that the card exchanges resolution and/or frequency combos with the monitor via a certain channel during boot? Hope you can help me...

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Mavke
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Re:Radeon HD 2600 XT, problems with no signal on HDMI cable? - 2007/08/19 11:02 Well frankly I have no clue at all. So you could be right, but with HDMI I haven't played around yet and it might just be your monitor as well. That's is something we saw in the past already. But by any means does anyone have some input on this? Cause I am interested as well.

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topcaser
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Re:Radeon HD 2600 XT, problems with no signal on HDMI cable? - 2007/08/19 11:46 Detected an interesting thing today morning. I switched on the PC because I wanted to set something in the mainboard BIOS. I haven't switched on the monitor yet. I pressed key Del to enter the BIOS and switched the monitor on. I have seen all BIOS messages. Thought, I was on the wrong input at the monitor cause I still have connected this S-Video cable. But, the monitor was switched to input HDMI. After finishing the BIOS the PC begins to reboot. But it lost connection at once. Unfortunatley I did not check the resolution and/or frequency combo. Maybe it reproducable. Will double check and report it.

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Dexx
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Re:Radeon HD 2600 XT, problems with no signal on HDMI cable? - 2007/09/05 10:19 I have the same issue on my Radeon HD 2600 PRO card. My old GeForce 6600 GT via a DVI to HDMI adaptor works fine. But the Radeon HD 2600 PRO comes up with no signal, even at boot. I can only conclude that the signal strength of its DVI and HDMI outputs is so weak that the projector doesn't recognise it.

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topcaser
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Re:Radeon HD 2600 XT, problems with no signal on HDMI cable? - 2007/09/06 12:40 Have you created a ticket? If more people come up with that they might going to do something. Nevertheless, I have created one and the support answer again and again to a problem where Windows is already booted, regardless what I write him. Are they silly at ATI? I have written to speak to the second level support. But the same... Problem doesn't occurs with Radeon HD 2400 XT cards...

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pronto
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Re:Radeon HD 2600 XT, problems with no signal on HDMI cable? - 2007/11/12 22:53 Just bought a PowerColor Radeon HD 2600 XT for my home theatre PC, this is attached to my projector by a 15m DVI to HDMI ProfiGold cable. The problem is that the signal is not getting to the projector from the card you don't even see the bootup menu. I bought an ATI Radeon HD 2400 this didnt work either that's why I thought buying a Radeon HD 2600 would solve the signal problem but to no avail. The GeForce 7600 GT I had in the home theatre PC worked okay over this distance do you think a DVI signal booster will solve this problem?

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Mavke
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Re:Radeon HD 2600 XT, problems with no signal on HDMI cable? - 2007/11/12 23:23 Well I have no clue, I would think it would just work cause with each Radeon HD 2x00 series you get those nice DVI to HDMI convertors... Did you use that?

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