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Thread Tools | Display Modes |
#1
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Display dropped out -- ohhh myyyy gawd!
Returned to find the monitor displaying "no input". Rebooted and,
like an un-sync'd modem, it reestablished itself. DVI connector on it for the past month. Prior, just VGA, which this new MB apparently labels (under) D-Sub/DVI-D, although it has both a normal 15-pin VGA and the later, squarer DVI-D variant that can be had w/ or w/out the horizontal spacer, at one end, separating two sets of audio pins. I'd bought the right designated one, DVD-D without the four pins, from China, but they messed up and instead sent the four pins (which I broke off with pliers, including the spacer). It's a converter for DVI-D to 15-pin VGA at the other end. I didn't mess much with that, (after yanking out its pins like teeth), instead going very simple, to use a old 15-pin cable with VGA (D-Sub) on both ends. Leaving -in- the connected HDMI, incidentally, while switching back and forth from the BIOS. When D-Sub (VGA) is selected, so it comes up and until Windows, just past the login and into the desktop, when it mysteriously switches over to the HDMI port. I pulled the HDMI cable from the monitor at that point, without further issues running while remaining on the VGA port. Rather, it got weird. With everything off (by way of audio producing programs), with the computer on, I happened to hear a whine, from the monitor -- doing its "unique thing" -- while switching initially from BIOS selected D-Sub/DVI-D (VGA and not D-Sub/HDMI), so as to change to HDMI, apparently in response to Windows' instigation. In part, although somewhat remotely, so as to say why I should then switch entirely to VGA connects (physically removing the HDMI cable, irrespective of the BIOS video priority settings). I really don't need to hear the electronics of a monitor "whining," nor, obviously, to find either the computer, or monitor, shutting itself off, in an obvious fault error, while and if not sending than then receiving a video signal;- I suspect the monitor for a faulty receiving response -- a supposed rebadged Toshiba sold under Best Buy's homebrand, Insignia. Not that the MB is entirely free of a bit wackiness in the way of its logic, either. I have had to restore, activate the default video boot state: An AMD 3000-series video chip for the 15-pin VGA port, with a paperclip over the MB's reset pins, when it locks itself up after populating the PEG slot (PCI-E) with a another board. In sum, three options for MB video physical connections, all together, if not running an external board slotted on the PCI bus;- BIOS first offers two selections, the abovementioned D-Sub prefix to HDMI and DVI, as well as an AUTO;- and then there's an "undocumented" PEG selection (PCI Express Graphics), not even mentioned in Gigabyte's distribution manual accompanying the MB. Perhaps -- should the VGA cabling never, ever again randomly shut itself down, to display a monitor message: No Signal Present, then I should take out an old Matrox PCI non-Express board, stuff it in for the BIOS PEG selection. No way it could conceivably smoke, yes? |
#2
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Display dropped out -- ohhh myyyy gawd!
Flasherly wrote:
Returned to find the monitor displaying "no input". Rebooted and, like an un-sync'd modem, it reestablished itself. DVI connector on it for the past month. Prior, just VGA, which this new MB apparently labels (under) D-Sub/DVI-D, although it has both a normal 15-pin VGA and the later, squarer DVI-D variant that can be had w/ or w/out the horizontal spacer, at one end, separating two sets of audio pins. I'd bought the right designated one, DVD-D without the four pins, from China, but they messed up and instead sent the four pins (which I broke off with pliers, including the spacer). It's a converter for DVI-D to 15-pin VGA at the other end. I didn't mess much with that, (after yanking out its pins like teeth), instead going very simple, to use a old 15-pin cable with VGA (D-Sub) on both ends. Leaving -in- the connected HDMI, incidentally, while switching back and forth from the BIOS. When D-Sub (VGA) is selected, so it comes up and until Windows, just past the login and into the desktop, when it mysteriously switches over to the HDMI port. I pulled the HDMI cable from the monitor at that point, without further issues running while remaining on the VGA port. Rather, it got weird. With everything off (by way of audio producing programs), with the computer on, I happened to hear a whine, from the monitor -- doing its "unique thing" -- while switching initially from BIOS selected D-Sub/DVI-D (VGA and not D-Sub/HDMI), so as to change to HDMI, apparently in response to Windows' instigation. In part, although somewhat remotely, so as to say why I should then switch entirely to VGA connects (physically removing the HDMI cable, irrespective of the BIOS video priority settings). I really don't need to hear the electronics of a monitor "whining," nor, obviously, to find either the computer, or monitor, shutting itself off, in an obvious fault error, while and if not sending than then receiving a video signal;- I suspect the monitor for a faulty receiving response -- a supposed rebadged Toshiba sold under Best Buy's homebrand, Insignia. Not that the MB is entirely free of a bit wackiness in the way of its logic, either. I have had to restore, activate the default video boot state: An AMD 3000-series video chip for the 15-pin VGA port, with a paperclip over the MB's reset pins, when it locks itself up after populating the PEG slot (PCI-E) with a another board. In sum, three options for MB video physical connections, all together, if not running an external board slotted on the PCI bus;- BIOS first offers two selections, the abovementioned D-Sub prefix to HDMI and DVI, as well as an AUTO;- and then there's an "undocumented" PEG selection (PCI Express Graphics), not even mentioned in Gigabyte's distribution manual accompanying the MB. Perhaps -- should the VGA cabling never, ever again randomly shut itself down, to display a monitor message: No Signal Present, then I should take out an old Matrox PCI non-Express board, stuff it in for the BIOS PEG selection. No way it could conceivably smoke, yes? Only connect one video cable from the computer to the monitor at a time. That's to make it easier for the human operator, to understand what is going on. On a DVI-I to VGA adapter, the "cross plus four pins" is the VGA section. If you remove those items, then it's no longer a DVI-I to VGA adapter! This applies to a passive adapter. A passive adapter may cost $2 to $10 or so. Consult the pinout table here for details. https://en.wikipedia.org/wiki/Digital_Visual_Interface An active DVI-D to VGA would be a more unusual product, and need a power source. The +5V pin on the connector, may not be sufficient to power such an active conversion protocol. An active adapter could cost up to $100. (No, I haven't priced one recently, and the cost can only drop if they make large quantities of them.) There isn't a good reason for an LCD monitor power source to "whine". I have a cheap Acer monitor here, that goes through all the power states, with no acoustic output at all. While a power converter could have "coil noise", that would be unusual. The electrical load inside the LCD monitor is known, and the designer can test for flawless power converter behavior, over the 0.5W to 30W range of consumption the monitor might have. If the monitor internal PSU has "leaking capacitors", that might cause a change in operating point or frequency. I would only take the monitor apart, if the cover is screw-mounted. If it's those damn plastic tabs, I wouldn't bother. I hate messing up the plastic on an item, trying to get it apart. a screw based cover would be a lot easier to remove. The noise could also be coming from an inverter that powers a CCFL tube. If the LCD monitor uses LED backlighting, then it won't have an inverter present (the power would come from the main PSU block). The inverter on a CCFL operates at 25KHz (out of audible range). But, it is PWM modulated, when less than full screen brightness is desired. That PWM modulation might alias down into the audible region. (The inverter does "bursts" of 25KHz sine waves.) The scheme works that way, to keep the plasma inside the CCFL tube, in a conducting state. Simply dropping the voltage (the old way of doing it), has a limited intensity range. If the monitor has loss of sync (because the computer turned off the signal on the video cable), then the inverter should just stop entirely, and not make a noise. Paul |
#3
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Display dropped out -- ohhh myyyy gawd!
On Fri, 01 Sep 2017 03:40:23 -0400, Paul
wrote: Only connect one video cable from the computer to the monitor at a time. That's to make it easier for the human operator, to understand what is going on. On a DVI-I to VGA adapter, the "cross plus four pins" is the VGA section. If you remove those items, then it's no longer a DVI-I to VGA adapter! This applies to a passive adapter. A passive adapter may cost $2 to $10 or so. Consult the pinout table here for details. https://en.wikipedia.org/wiki/Digital_Visual_Interface An active DVI-D to VGA would be a more unusual product, and need a power source. The +5V pin on the connector, may not be sufficient to power such an active conversion protocol. An active adapter could cost up to $100. (No, I haven't priced one recently, and the cost can only drop if they make large quantities of them.) In one scenario, of two cables present, within possible connections from the three video ports on the back of the MB (excluding of course any slotted video cards), it's actually possible to run two monitors simultaneously. Needn't apply to me, though, as I'm only interested in one monitor -- a monitor which coincidently allows only either a D-Sub 15-pin VGA if not a HDMI (the monitor manufacturer's recommended "best" port). All the DVI-D was is a foray, (unsuccessfully attempted on my part, to try and get all ports up and running. An Ebay item: 6FT PREMIUM HDMI CABLE For BLURAY 3D DVD HDTV XBOX LCD HD TV 1080P- US Stock New Item price $0.99 Which is just as easily forgotten, especially, as you say, if I pulled out video and not extraneous sound pins. There isn't a good reason for an LCD monitor power source to "whine". I have a cheap Acer monitor here, that goes through all the power states, with no acoustic output at all. While a power converter could have "coil noise", that would be unusual. The electrical load inside the LCD monitor is known, and the designer can test for flawless power converter behavior, over the 0.5W to 30W range of consumption the monitor might have. If the monitor internal PSU has "leaking capacitors", that might cause a change in operating point or frequency. I would only take the monitor apart, if the cover is screw-mounted. If it's those damn plastic tabs, I wouldn't bother. I hate messing up the plastic on an item, trying to get it apart. a screw based cover would be a lot easier to remove. The noise could also be coming from an inverter that powers a CCFL tube. If the LCD monitor uses LED backlighting, then it won't have an inverter present (the power would come from the main PSU block). The inverter on a CCFL operates at 25KHz (out of audible range). But, it is PWM modulated, when less than full screen brightness is desired. That PWM modulation might alias down into the audible region. (The inverter does "bursts" of 25KHz sine waves.) The scheme works that way, to keep the plasma inside the CCFL tube, in a conducting state. Simply dropping the voltage (the old way of doing it), has a limited intensity range. If the monitor has loss of sync (because the computer turned off the signal on the video cable), then the inverter should just stop entirely, and not make a noise. Paul No, the monitor, normally it would not any noise. None that up until now, I've noticed. Nor would it mysteriously "drop" the display, to go into a reserve black-screen state with a box to display, temporarily bouncing around the screen, stating an error -- that there is no video signal present. That is a first and what I walked into last evening. The whine was incidental and between my taking direct action, roundabout opening that Chinese package containing the ill-fated HDMI cable abovementioned -- and an alternative resource I have for hooking (back up), primarily, both-sided VGA-to-VGA ports that's still if barely, around after 20 years for a standard. Rather I should hope to say, I will not again, nor do I foresee any need, in my case, to run more than one video cable. That the whine should not occur again will of course also be greatly appreciated. What bugged me last evening, threatened to raise the hairs on the back of my neck, was, after finishing a work-out in my exercise room, walking back in to the find music I'd selected still going, yet with the monitor reporting the "no video source" error. Everything was fine, including an operational video screen, when I left it for my weight room. Could be some sort of fluke, I suppose. Things that go bump in the night ... like a few hours later into the evening, than all the above, and a particularly nasty brown-out I got hit with. A 2T HDD, I've split into two large if not equal partitions. I was using, reading but not writing, from one of those partitions. When the boot finished -- that computer almost never occurs a checkdisk condition, being for the most a read-only multimedia center -- well, it did that time and checked the disk during the boot-up. And it found and marked two relatively small files in a FOUND.000 (not exact folder name) folder, which Windows normally uses for a CHKDSK dirty-boot flag. I swear, much more of this spew and I'm going to be off into a condition of two HDDs, one a backup, and studying a quick way to filter MD5 hash-tables between any dissimilarity found betwixt the two. Anything else, I suppose, before I'd consider hooking up a motorcycle battery, encased in a UPS unit, to the entertainment centre. |
#4
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Display dropped out -- ohhh myyyy gawd!
On Fri, 01 Sep 2017 14:36:59 -0400, Flasherly
wrote: checked the disk during the boot-up. And it found and marked two relatively small files in a FOUND.000 (not exact folder name) folder, which Windows normally uses for a CHKDSK dirty-boot flag. Forgot to mention the CHKDSK reported error were on the *opposite* side of the HDD, on the *other* partition -- I was NOT reading only from at the time the brownout sucker-punched me. Dahm! |
#5
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Display dropped out -- ohhh myyyy gawd!
On Fri, 01 Sep 2017 14:36:59 -0400, Flasherly
wrote: - The noise I heard and attributed to the monitor may be wrong. I've laser SPDIF cabling, from a soundcard to a analog converter. Being one of several feeds into a mixer. That converter is USB-powered and hasn't the greatest floor for filtering out computer data-line signals, induced as noise from the USB power line. Especially with a DBX 118 expander/compressor, I use liberally for the driving the expansion stage, as part of a parallel sum to a signal chain of effects from the mixer;- there's also a fair amount of open headroom dialed into a couple amp's volume. It "sounded" as if coming from the monitor, (between two nearfield 140W speaker monitors, in turn between two larger 250W arrays), that may, regardless, be a USB-derived source mistaken for a monitor whine. Although the DHMI port entirely dropping out, so reported by the video monitor, is an inexplicably strange first occurrence. |
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