Power Mac :: Random Black Screen - Is It Monitor Or Graphics Card?
Mar 21, 2012
Do not want a nuisance to escalate into a serious problem thru benign neglect. Random black screen -- Turn monitor off then on, and all comes back fine. No loss of power in machine, no fan quirks, no overheating. Is it the Monitor? or the graphics card?
Info:
PowerMac, Mac OS X (10.5.8), 6GB DDR2 SDRAM
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Dec 11, 2007
After the 10.5.1 software I'm having a problem with distorted (stripes etc.) icons and menu dropdowns. Apparently not on my desktop or programs like Safari, Mail etc., only on icons and menu dropdowns, which I find odd. Sometimes it's gone, but after some time it reappears again. Anyway, sometimes my Mac (iMac G5, PowerMac12,1, 1.9 GHz) is going bonkers completely, which results in a first pink, then black screen. A hard shut down is then the only option. However, I guess it's videocard related (ATI Radeon X600 Pro). I did all the tests, fixes you can think of, but without any results. I contacted Apple support, but because this is an iMac, you can't just replace the card, they told me that the whole motherboard should be replaced, which will cost me approx. 700 EURO. Of course I am not willing to do that, which means that I'll have to buy a new Mac. Of course a new Mac is always a delight, but I find replacement after just 2 years unacceptable.
Information:
iMac G5 PowerMac12,1
Mac OS X (10.5.1)
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Mar 19, 2010
I installed USB Overdrive (a program), I clicked on restart and my iMac never got up. When I start it, the HDD and fans do work. But there is no boot sound, and when I change sound levels, I cannot hear it. I think, it never makes it to OSX. It does not load the OS. I dont think it is Graphics card (HD2600) failure.
When I try to reset PRAM, nothing happens. Usually I must hear it restart again with loud boot sound but it never happens. Also my keyboard does not seem to work, as the CAPSLOCK button does not light up, when pressed. I changed RAM to different moduls, still the same. I checked the iMac RAM on a different computer, it works. Maybe USB Overdrive killed the USB slots? As my USB keyboard does not seem to work
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Apr 15, 2010
I've got a 2007 Macbook Pro. It's on its second graphics card (8600M GT), the first one failed on me a year ago. OS X 10.5.7, all firmware updates installed.
I think I have a new graphics card issue, but I can't prove it. In Front Row, after 10-20 minutes, often parts of the screen will start going black. Then it freezes. Sound works fine. It doesn't look like the same kind of wild distortion that I got when my GPU failed the first time, though, it just looks like things have been rendered incorrectly.
When Front Row finally quits, I've had black and white bars across my menu bar a couple of times. Once the computer then totally locked up and I had to reboot.
In Windows XP in boot camp, things are worse. I only use boot camp for games, since they use a lot of graphical power, it made sense that the problems happen there more often. After 15-20 minutes, the screen will start stuttering, then the keyboard/mouse will stop responding. The sound will hiccup a few times too. That lasts about 10 seconds, then everything returns to normal for a while (as little as 10 seconds, or as long as 5 minutes.)
The Apple Hardware Test (short and extended) shows no trouble. Techtool Pro shows no trouble. I ran the very thorough memtest86+, and it showed no memory trouble.
Can anybody give me any tips on definitively diagnosing this problem? Is there any kind of really intensive hardware test I can get (a live CD maybe)?
Second question, has anybody heard of Apple replacing a laptop that has had many faults with a brand new unit?
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May 29, 2012
a friend recently gave me a g5 power mac that had some issues, and the failure was described as intermittant. The machine supposedly would work properly when booted and start freezing up after time, but if turned on the next day it would work properly for some time. I assumed it was an overheating issue, but apperently there is more to the picture. I have tried booting the machine quite a few times and the display always reads no signal. The machine sounds as if it were booting normally, but there is not output. At first I assumed it was my display cable, which was a DVI-D single link, however the DVI-D dual link cable leads to the same result. Is it nessicary to have a DVI-I cable? None of the error LEDs light up on the motherboard. After doing some hunting I haven't found anyone with the same issue, but I am wondering if I should assume the graphics card is dead. What steps do I need to take to isolate a graphics card failure in a power mac g5?
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Oct 8, 2007
I hav" a "late 2004" G5 2.0 dual processor. To upgrade graphics card, I find many require a power supply splitter. Do I have a molex 4-pin connector? I can't see the location inside the box.
Information:
G5 dual 2.0, 2.5Gb
Mac OS X (10.4.3)
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Jan 15, 2009
is it possible to add another monitor to a Imac with the 256MB graphics card on it?
The system will have 4gb Ram.Is this graphic card strong enough or is it better to get the 512MB one?can I easily run lets say... dvd encore, premiero pro type of software?
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Jun 8, 2010
I'm referring to this thread here:
[URL]
There's 2 images that are missing so I'm a bit confused. It seems pretty basic but I have to ask just to make sure. The cables that came with my card looks exactly like the image in the post. It has 2 inputs PER cable. With the molex split, I'm guessing I plug only 1 in per cable, so does that mean the other input is left hanging with no connection? Is there a specific input on the cable that I use? I notice there's only 3 colors with yellow and black leading to different holes and the brown one leading to the same hole. It seems so basic, but so confused without the 2 missing pictures.
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May 6, 2012
I bought a Referb 09 Mac Pro. I purchased a Gigabyte HD Radeon 6850. The Power cable that came with that card is obviously for a PC.I just need to know what cable I need and where I can get it?
Info:
Mac Pro, Mac OS X (10.7.3)
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Oct 21, 2009
Firstly sorry if this has been answered before
I have a 2 x 2.8 Mac Pro and want to have dual monitors for Photoshop and Dreamweaver development
The monitors I have are 2408WFP Dell displays
The MP has a ATi HD 2600XT fitted
What is the best solution for dual monitor support.
ATI 4870 or ATi X1900 or GTX285?
Does the ATI 4870 support 2 DVI monitors with adaptors?
Can I use the 4870 with the 2600??
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Oct 30, 2009
Would a Macbook Pros Graphics Card Support two monitors? If so what kind?
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Sep 24, 2010
The screen randomly turns black without any major reasons. It doesn't seem to be a sleep mode/screen saver thing as the music continues to play on. I can adjust the volume or pause the music with the keyboard but the screen just won't turn back on. I have to shut it down using the power button and it happened several time the last couple days. Anyone else experience the same thing and got a solution?
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Nov 19, 2009
Is anyone else experiencing this issue? I have a external monitor plugged in and I use my Macbook Pro (2009 Uni) as a secondary monitor. Randomly, the macbook screen just goes black. If I move my mouse on to the macbook screen, I can see the mouse cursor, but the rest of the screen is black! It's driving me mad!
The only fix is to un-plug the monitor adaptor or adjust display arrangements. It's really cramping my style.
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Mar 28, 2008
I'm looking on cragslist right now for an older powermac to use as a media hub and I think I found one. It appears to be an AGP G4 PowerMac (500Mhz-ish). I have a 256MB graphics card I was using with my PC, I was wondering if I could plop it in and it would work? I know it's probably a pipe dream, but it doesn't hurt to ask
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Feb 6, 2010
I'm upgrading to a Nvidia GeForce 8800GT graphics card on my 1st gen Mac Pro. I know how to install the card and that it needs aux power to work. The card has the aux power cable, but I'm not sure where to plug it in. There is a egg crate looking connector near the fan. Is this the aux power connector? There are two little prongs on the cable? Do these prong have to go into a specific side (i.e. positive and negative).
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Apr 7, 2012
I have a Dual 1.8ghz G5 with 6 gig of Ram and wish to upgrade the Graphics Card. Can anyone tell me a decent card that would improve my system and that would be compatible with the machine. I currently have a 64mb card installed.Â
Info:
PowerMac, Mac OS X (10.5.8)
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Aug 21, 2009
I want to run an Imac and an external Monitor, but I want to use the complete graphics power on the external Monitor, so no mirroring of the displays. Is there any way to shut down the internal display?
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Jun 6, 2012
iMac 27 the screen goes black at random times. If left for a time and by pressing ctrl, Shift Eject, the screen comes back and can remain on for the rest of the day. However, the next day the same thing happens. Â
Energy saving set to - Hard disk never sleep, Screen sleep in 15 mins.
Info:
iMac (27-inch Mid 2010), Mac OS X (10.6.8)
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Oct 24, 2007
Will a NY GeForce 6200 256MB Graphics Card work on mac with a PCI slot?
Information:
Mac OS X (10.3.8)
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Oct 14, 2010
I have a friends macbook. It's circa 2004 according to her. The display look horrible. It looks equivalent to like 8bit windows YUCK. I'm not sure the problem, but it's hard to diagnose (I'm a noob anyway), when I can't see anything!!
Heres a pic
could someone point me in the right direction. I tried searching but it's hard to find anything because I don't know how one might describe this problem correctly.
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May 9, 2010
I just got a new MBP i7, and whenever the graphics switch from the Nvidia 330m chip to the Intel chip, the screen "flickers" black for a short moment before reappearing. Can anyone with a new MBP comment on this behavior? It doesn't happen on the switch from Intel->Nvidia, just the other way around.
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Jun 18, 2012
I just got my macbook pro retina 2.6 with 16 gigs of ram. It was working great for the first 40 minutes then on the left side of the screen two inches went black, then the screen went fuzzy then cleared up. I reinstalled the OS just to be on the safe side and sure enough it happened again. Called support and they told me DOA, however they can't do anything because apple support systems are down! Check out the photos of my screen. It will clear up if I don't use it for a few minutes which makes me think it is the graphics card. Hope this isn't a displaygate for apple all this money and I get a DOA - whatever happened to QA?
Info:
MacBook Pro (Retina, Mid 2012)
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Jun 22, 2010
My two previous older macs have been perfect to me, but this new MBP I5 model is giving so many issues lately. Every once in a while, my computer's graphics (I am assuming) goes crazy, and I get this pixelated distortion that's right in the middle of my screen that's about 2"x5" on my 17" screen. This happened just earlier, while I was using Safari. However, even after closing all of the Safari windows down, the distortion will still be there, and will stay there regardless of what I have or don't have open. Logging in and out will fixes the problem, and everything goes back to normal for the mean time. Any one ever experience similar problems or know what I could do to see what's going or fix it?
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Aug 23, 2010
Every once and a while, usually when my MacBook is running on it's battery, the screen will show a black screen for nearly only a millisecond or two. It's not too bothersome, and it usually blinks back to normal before I can notice it, but nevertheless I don't want it, and from what I can recall, this only started happening after I installed the Snow Leopard Graphics Update. Is anybody else getting these problems on their MBPs or MBs? MacBook config details in my sig.
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Jun 30, 2012
This is what my monitor looks like when on this screen saver.Not actually that red as I'm typing now though this screen saver really shows it up.url...
Info:
Mac OS X (10.6.8), Logic 9.1.6
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Dec 27, 2010
Yesterday I was watching a film from an external hdisk with VSL program.I had connected my Macbook pro to my LCd tv with a DVI/HDMI cable.When the film finished i went to another room to do something and when i came back the monitor and the tv were black . I pressed the esc key but nothing.I pressed the power button off and on again but nothing.The mac is sleeping.I disconnected the battery but nothing.
My Macbookpro is three years old and this is the first time that i have a problem.I tested a lot of combination of keys ,something like the ctrl+alt+del in PC but nothing.
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Jun 4, 2012
About half a year ago I got a Macbook Air, and a Thuderbolt monitor. Then I installed Windows 7 64-bit on it. Everything worked fine until recently the Thunderbolt monitor started to go black during Windows startup without any particular reason. Using OS/X the monitor works fine. I already scanned for malware and viruses but cannot fine any. Windows restore refuses to work? I also tried several different boot options, installed latest drivers, reinstalled bootcamp drivers but no luck so far. Â
Info:
MacBook Air, Windows7, bootcamp dual boot
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Dec 13, 2007
When I start my computer up in the morning everything else starts normally. First the light comes on on the front of the computer and on the bottom of the monitor, then the start up tone rings and the computer is fully running. But my monitor is black and I do not get the apple picture or nothing on the screen. I thought my monitor was going out, but we have another work station the same and I switched the monitors (same 27" cinema screen as mine). I can actually use the other computer and network into my computer and fully use everything on my computer. But my monitor is black (no display)! I have contacted MAC and have reset the PMU button many times and sometimes this works, but most of the time it does not. I just keep restarting the computer and finally it will start up normally with the display and everything.
Information:
Dual 2ghz PowerPc g5
Mac OS X (10.4.11)
27" Cinema Screen
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Jun 10, 2010
24" iMac running 10.6.3 and having some issues all of the sudden with my secondary monitor. It detects the display and the monitor comes out of standby, but only shows a black screen. Tried it with another monitor to see if that was the issue but it's not. Seems as if the iMac is sending bad video signal out... Couldn't find anything similar on a quick google search so I thought I'd try here to see if anyone had any similar problems.
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May 11, 2012
I have a early 2011 MacBook Pro 13" running the latest version of Lion. I have been using my MacBook with an external monitor since I brought it in 2011 and have had no problems with connecting it to my external monitor. Connected via mini display port DVI adapter and a DVI cable to a Philips monitor.
Two days ago when I plugged the MacBook back in to the monitor I connected and but now only displays a black screen, I can move the mouse off the MacBook screen and over to the external monitor and back but it is not displayed on the monitor. I have tried connecting other devices to the monitor and they work fine.
Info:
MacBook Pro (13-inch Early 2011), Mac OS X (10.7.4)
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