DVI Signal Irregularities

When I connect my MacBook Pro to my HDTV (Sharp Aquos 37") via DVI cable, the signal looks great.
However, every 30 seconds or so, the signal gets a strange irregularity. It's hard to explain, but the displayed image seems to "split" -- with the bottom portion of the screen slightly off alignment. This "split" moves upward on the screen until it gets about half way to the top, then disappears. It's pretty frustrating to see.
Anyone know what could be the root cause? Is it my DVI cable? My laptop? My TV? Thanks in advance...
Scott
Memphis, TN

I've seen that kind of thing on CRT-based televisions but never on a digital TV. When it happens on a CRT TV, it is usually that you are seeing the beat frequency (small difference) between the 60Hz power line and the 60Hz video frame rate.
One thing you might want to try is disconnect all other video connections from the Sharp and make sure the MBP is the only thing connected. Also, make sure the MBP and the Sharp are plugged into the same wall outlet. If the irregularity goes away, it could point to a grounding problem among all your equipment. Start plugging things in one-by-one until the problem comes back. That can help you isolate the issue to a specific piece of gear or a specific connection.

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HP2311f monitor no vga,hdmi or dvi signal

I had this computer for about a year now and it has been working fine until this morning when i restarted my computer due to an update , it suddenly had no hdmi , vga or dvi signal. I have checked all cables and they are plugged in correctly. Can someone help me?

Hello robertsport,
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I understand that after an update all of a sudden you are not getting anything displayed on your HP 2311F LED Monitor. I would be happy to assist you, but first I would encourage you to post your product number for your computer. I am linking an HP Support document below that will show you how to find your product number. As well, if you could indicate which operating system you are using. And whether your operating system is 32-bit or 64-bit as with this and the product number I can provide you with accurate information.
How Do I Find My Model Number or Product Number?
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No DVI signal, only analog and TV-out

Hi, I bought a new computer a couple of months ago and have been having some problems with my graphic card (MSI FX5900XT-VTD128). Most of these problems disapeard when I re-installed WindowsXP.
However, about one week before I re-installed WindowsXP my screen just went black when I tried re-installing my video drivers. First I thought that somehow in the pocess of installing the new drivers my video card got overheated or something and broke (highly unlikely, but I have seen strange things in my days).
Furthur investigation revealed that it was "only" the DVI signal that stopped transmitting. I have since then tried to enable the DVI signal with no luck. I haven't found any options in both the NVIDIA drivers nor the MSI drivers in which to choose analog or digital output.
My monitor shows that there is a DVI conneciton, but the screen is still black. In most of my tests I would have DVI and TV-out plugged in so that I can make changes in the settings through my TV.
I'm running out of things to try and I am very open to suggestion, if anyone would be so kind.
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Thanks for your suggestions.
I already tried the driver solution, and it didn't work... However, I can try even older driver and see if they will enable the cards DVI signal. The problem with the driver solution is that there is no setting for choosing CRT or LCD monitor. In both dual view and clone mode I can only choose between a monitor and TV output... One thing I found strange though, normally at boot time (before the OS loads) I would get both analog and digital signals, but now there is only the analog signal.
The monitor solution I will try in a couple of days, when I will carry my computer over to a friends place and try it on his monitor. The only problem is that my computer is so damn heavy! :-)
I will keep trying and let you guys know how it worked out.
In the meantime, if anyone else has a suggestion, I'm all ears.

No DVI Signal

My HP S2031a 20” Widescreen LDC monitor cannot find the DVI signal from my HP Pavilion G5460uk (LN868EA) Desktop.
The VGA connection still works just fine - from first connecting up and switching on, even without using the supplied drivers C.D.
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My Desktop was eventually sent to the company who are commissioned to repair H.P. computers.
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I’ve got two monitors hooked up to Nvidia NVS 295 sitting in 16x PCI-E .
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You shouldn't assume that a 1000W supply will instantly grant you enough power to run the config you want. It's all in how the rails are distributed. I can take a standard desktop supply and design in 800W worth of 5V rails and call it a 1000W supply (stupid example, but it demonstrates the point).
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Sa-1110 No DVI signal.

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Hi Team,
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The only thing I can think of right now would be drivers.
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The video quality should not be compromised by using any of these adapters. The ADC outputs the same exact digital signal as the DVI outputs. The ADC-to-DVI adapter basically discards the USB and power features and passes the digital AND analog signals through.
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http://en.wikipedia.org/wiki/DigitalVisualInterface
http://en.wikipedia.org/wiki/AppleDisplayConnector
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No vga/dvi signal , sends monitor into sleep mode even though I disabled sleep mode.

I have a HP Pavillion Media center PC system # RX883AA-ABA with a NVIDIA GeForce 7350 LE graphics card. The monitor is a HP w1907, it is connected to the desktop vga(monitor end) and dvi (desktop end) due to there is no vga port on the desktop.
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In checking the SPEC page for that model, I see that PC does have onboard graphics. Since it does, you can easily check and even use the PC by removing the graphics card and connecting the monitor to the VGA out from the onboard graphics. Once the step is done and still it works, just not with the graphics card, then replace the card. With only a 300W power supply, not much of a card can be installed. It would appear sometrhing similar to THIS would be compatible.
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We have an HP2009m and every time we turn it on it shows no DVI signal and monitor going to sleep

HP2009m monitor goes to sleep every time you turn it on. HELP!

I am having same problem. Can someone help

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My monitor has VGA/DVI only (Samsung SyncMaster 213T), I have a HDMI to DVI converter in the DVI port, this works with the HDMI out from my laptop.
Am putting together a Z97M/4790K rig. I get no signal at the monitor from the Z97M's HDMI out, if I connect it to a TV I do get a signal.
Am using the same (short) HDMI cable and adaptor with both the laptop and the new Z79M, used the same cable to connect the Z79M to the TV.
So the cable and converter are good (they work with the laptop) and the Z79M HDMI port and cable are good with the TV.
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Yes, to be clear, there is no GPU. When I say the Z97M's HDMI out I mean the output from the Z97M motherboard. I have tried it with a second screen, the TV (it worked).
Logically one of two things must be happening... either the Z97M's HDMI signal isn't making it through the DVI/HDMI adaptor (when the laptop's signal is), or the monitor cannot process the Z97M's HDMI signal (when it can process the laptop's).
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But both the monitor and laptop (which work together with HDMI and the DVI converter) are >5 years old. The Z97M is very new and could be it's HDMI output just isn't compatable in some way with the (relatively) old monitor.
Hence am wondering (for example) if there are any Z97M bios settings which might make it talk nicely to the old monitor.
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DVI Signal Irregularities

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