Mac Pro :: USB Or Peripherals - Screen Hub / Main Unit Intermittent Fault?
Apr 14, 2009
This is something I've been wondering for a long time. I seem to have a lot of screen-related issues with the Pros that I sit in front of in the main. Brightness controls going haywire displays not turning on, etc. There is also the odd attached USB device lockup, but I'd been putting this down to the devices themselves and the occasional, app-level instability of Leopard. More recently though, I've been seeing a pattern that's leading me to suspect the Pro's more than the peripherals. Is there a documented case of possible USB hub connection issues in (fully patched) 2008 Pros? The most frequent issue is monitors not behaving as expected when the system is booted until the monitors themselves are unplugged from power. There are also less frequent but present problems where iPods lock up, keyboards stop working, etc. I can't really abstract the problem down to an OS issue or a hardware issue, but the need for me to unplug the monitors seems to indicate that there is some sort of USB initialisation issue - as with the other minor problems I experience with other monitor-connected USB peripherals. Since I only use multimonitor environments as far as my Pros are concerned, all USB connections are usually made from the backs of the screens. So the big question is is this a screen USB hub fault, or a main-unit intermittent fault? All of the monitors I'm using have been to Applecare for one reason or another, although I'm not sure if they check everything in these repairs.
Can anyone else shed more light on this issue? It's pretty hard to replicate reliably and it's not been something I can go to Apple with any degree of certainty, yet the little minihoops I have with this problem (and oh so many other Apple issues, but that's by the by) irritate me immensely in comparison to my rock-solid, near-zero-such-issue, non-Apple environments which I also use daily.
Recently i've started to experience my iMac screen flickering for approx 2 seconds, and then turning back on. I was wandering if this was a common problem with this model of iMac (purchased mid-09, 2.66ghz 4gb ram model). I had read of such a problem with the new 27", and in some cases even with the 21.5".
I have only recently begun to use the iMac for relatively graphically-intense tasks, and was wandering if perhaps it could be a dying graphics card (or perhaps it was always faulty, but the lack of intensity of any programs run never pulled it up originally?), or if maybe it was an issue with the LCD?
I have a G5 that has started intermittently booting up with a totally blank screen - not blue, no video at all. Sometimes on reboot or after resetting the PRAM it works again.
I have a 17" MacBook Pro 2.16Ghz Core Duo with 10.6.2. I have an intermittent issue where half of the screen will go whitish with lines. A picture of my screen experiencing this is hosted at [URL]To return the screen to normal I simply have to close the screen and open it again.Unfortunately my AppleCare has expired, and my Apple tech is not sure of the cause. Any thoughts as to whether this is the screen, cable, or logic board.If it turns out to be the logic board, will the Core 2 Duo board fit into this case? If I have to replace the board anyway
I'm experiencing a intermittent screen scrambling on my MacBook 2 GHz Core Duo. It's a 3cm block which runs vertically down the screen and scrambles/inverts the colours in a flickering way.Â
First of all, Noob imac owner here. I was just handed down an old imac g3 400mhz desktop that doesn't power at all.When hitting the power button on the unit or keyboard, the units screen makes a noise. No hard drive or green light comes on at all. At dead silence in the room, i can hear the screen flicker, like a tv would come on. I went to go about and read a few problems before, replaced the battery and even tried a new power cord. Any Ideas?
My November 2011 17" MacBook Proi has on several occasions gone to a black screen, which requires hard shutdown and re-boot. It happens in two ways: coming out of sleep, the screen appears for a second and then goes black, and sometimes when jjust using the Mac.Â
It comes back on after re-boot with no apparent problems but seems to be occuring more frequently, so I need to get this fixed.Â
How do I get my Calculator on the main screen so I don't have to keep switching to the widget screen? i.e. I want to have a browser open and have Calculator open next to it.Â
I have a white MB (early 2008). I'm going to be getting an external monitor soon with a native resolution of 1920x1200 - the highest that the MB's Intel GMA X3100 will support. I know that I can open System Preferences > Display and then click the little menubar and drag it to the other monitor to make it the primary. Here is the thing: I want to just use my 24" monitor and not use the MB's screen with it (I have an external keyboard and mouse).
Should I... 1. Use the two displays as an extended desktop and then (leave the MacBook lid open) just turn the brightness on the MB all the way off so the screen is black (no back light)? or... 2. Just close the MacBook and use it in clam shell mode? I watch Hulu and YouTube a lot which causes the CPU load to increase and fans to spin up.... do I have to worry about over heating? I would be using the 24" monitor exclusively all the time and then take the MB when I go to class. Will this just ruin my MB pre-maturely?
I noticed that after upgrading to Lion quicktime player won't play movies full screen on my second display. Under Snow Leopard if the quicktime window was on the second display and you hit full screen it would fill the display is was on. Now the video slides to the main display and then goes full screen. There doesn't seem to be any way to change that behavior. There are no preferences. Â
The only work around is to move the menu bar in the display preferences to the second menu, so that the second monitor becomes the main one.Â
Info: MacBook Pro 17in 2.16, Mac OS X (10.4.7), 2gb ram 10.4.8
We have an iMac G5 running 10.4.11 which developed some nasty colour banding down the screen and have now plugged in an external display. How can you turn off the iMac display so it only outputs through the external monitor?
I have dual ACD's. How do I make it so that both screens have the same brightness? If I adjust the brightness in the display settings it adjusts the main screen, but then not the other one. How do I make them the same?
I bought a new internal hard drive for my late 2009 MBP and have completely cloned my existing hard drive to the new one. When I use the new hard drive through an enclosure I am able to boot from this hard drive perfectly, but when I install it into my MBP it won't read properly or something. It loads to my home screen with my dock, but when I try to click something, it just freezes up and I have to restart to the same thing every time. Anyone have any ideas on how this can be fixed?
I was just watching a video on Youtube and then all of a sudden my entire machine freezes, and it logged out me out completely to the main login screen? There was that tiny loading rotate logo in the screen also. What could have caused this?
across an OS 9 disk and it boots and all on my iBook clamshell. Just when I get to the screen where I choose what HD to install it on, there is 'no peripherals'
I was an owner of a white macbook for just over a year until the motherboard decided to give up the ghost... So I eventually bought myself a new 13" Macbook Pro. Everything was going just beautifully, until I realised when I was charging it, I had this weird electrical current going through all the aluminum.First of all the first two things that came to mind was. What's the computer and most importantly MY health going to be like if its exposed to all this! Anyway. I read a few threads, and they were talking about the "Grounding" problem. Luckily I got my old macbook charger out and plugged it in.. The problem went! So I was then thinking on where in the charger lied the problem? So I took the cable part from the Megasafe to the socket from my macbook, and then put it into my macbook pro Megasafe... and everything worked brilliantly! I'm no genius, however if you guys feel that tingly electrical/static current going through you're MBP, go and buy yourself a new cable. However as Apple is so popular, I'm sure if you try one of you're friends (As they will undoubtably have one) and see if it is that the problem. In anycase, I'm very happy with my Macbook Pro Apple make some awesome products. Bill Gates should just pack up and go fishing if you ask me. He can never compete with Me old mate Steve
I bought a faulty MacBook pro off eBay really cheap, it's immaculate condition externally but it won't power on. It came without a battery,charger or a HDD. The power adaptor came today and I put it in, without any battery or HDD would anything happen when you press power or not? Otherwise I'm assuming it's a possible logic board replacement?
I recently bought a used (early 2008) MBPro 15" 2.5 SR to do some video editing. Unfortunately it will not recognize my Sony DV camera, or an external HD connected via FW400 or my 12" PB booted in target disk mode. The camera and the hard drive both mount instantly on my 12" PB and a friends 15" PB. Also, when I check the Firewire status under System Profiler all it says is: Warning: Unable to list FireWire devices (in red). This is regardless of what is connected to the port or if nothing is connected to the port. I have tried rebooting the PRAM and changing the Firewire port's network preference to OFF as recommended by this post: [URL]
i have a mac mini which up until recently was working fine. now it won't read my external lacie drive, my lacie d2 burner or my m-audio firewire solo. i've tried rebooting, unplugging, replugging, switching cables...all to no avail. i hate to think that i have several hundred dollars worth of paperweights now. the system profiler recognizes that i have a firewire port, only when i plug something in it doesn't read it. are the ports on my peripherals fried?
Recently I've started creating and using Smart Playlists. And ever since I created a Smart Playlist - when I make any change to the metadata (artist, album title, anything at all - even just changing one letter) - iTunes freezes up for about 10 to 20 seconds as the wheel spins and iTunes processes the new information. But in the meantime iTunes is rendered completely frozen up for me. Same thing happens if I begin importing (whether from CD or just dragging) new music. Is this sort of thing normal? I assume it's the program processing the new information for the Smart Playlist, but for pete's sake, does it have to render the complete program useless? Smart Playlists are a nice idea, but they have made iTunes a nightmare to deal with!
can you do this with an airport extreme or time capsule? I assumed that by connecting the USB line of my ScanSnap scanner to these devices, I would be making them wireless (i.e., so I wouldn't have to plug the USB into my actual computer). It doesn't seem to work for some reason. Is it b/c that's not possible, or am I doing something wrong?
Earlier today I had the LED Panel replaced in my 27" iMac (Applecare Warranty) due to a screen discoloration that had appeared around the Optical Disk area of the screen. The replacement LED has resolved that issue. However, (and I don't know if this is due to the new LED installation) I now find that I cannot 'color calibrate' the new screen. On opening Display Preferences/Color, there are three display profiles listed;
On selecting any of the above and clicking the 'Open Profile' button - I'm given this message; Unable to determine file format. The file "/Library/ColorSync/Profiles/Displays/iMac-00000610-0000-9CB5-0000-000004272D40 .icc" does not appear to be compressed or encoded.It is advised that you obtain further information about the contents of this file from the sender or provider of the file.    On selecting the 'Calibrate' button - I'm given the message; Can not calibrate the display The factory profile for the display could not be found. Â
Info: 27, Mac OS X (10.7.2), • 23" HD Cinema Display • iPhone 3G 16Gb • ATV
I recently tried to update a few software on my MacBook Pro, but apparently software update crashed while it ran in the process. So I cannot update any software since it won't work at all. I even tried to run software update on command line and it gave me "segment fault".
After using a PC laptop for six months or so (and it really messing with my eyesight) I thought I'd try to revive my old macbook. Basically 70/80% of the time it won't turn on. There are these patterns of faulty behaviour which I hope you guys could diagnose:
1. I'll press the power button, I hear the disk noise, and the screen is black (i.e. not a backlight problem). The chime won't sound, I can just hear the fan and the hard drive whirring. The only way to get out of this is to power it off via the power button.
2. Sometimes after it's started up successfully and I move the Macbook (say, from a desk to my lap) the same thing will happen - black screen, with the rest of the stuff whirring, and if I try to shake it around nothing happens, I have to power off.
3. Occasionally when I power on, I just get the disk noise, a white screen, but no question mark, no apple logo, nothing.
4. Another time I tried to boot up with an external hard drive fitted and just got the chime over and over and over. Removing the drive solved this.
5. One time the screen just greyed out and a message in about 5 languages came up saying I needed to shut down my computer NOW.
This is not a hard drive fault - I saw that apple had extended the warranty on the hard drive because the question mark usually pops up for half a second at startup, and the nice guys at regent st London just whacked a new hard drive in, with a clean install of leopard (which was cool, I was previously on tiger at the time). I read something about resetting the PRAM (which I haven't tried), but I'm guessing it's the logicboard/motherboard. If this is the case, any idea how much it costs to fix? (My macbook is out of warranty). Figures in GBP appreciated but I can convert USD estimates. Is there any way I can try to blag a free motherboard and install from apple by exaggerating some symptoms?
What means hardware test fault 4Mot/4/40000003:HDD-1255? I´m searching for the reason of frequent freezing and finder freezing, freezing in Safari too, and got this result with extended Apple hardware test from CD. Checking volume by Lion recovery tells: volume seems to be o.k.
Info: iMac, Mac OS X (10.7.4), iMac 27" Dual Core, late 2009
I was wondering if someone could tell me what power supply is used in the current oct/quad core mac pro. Also in the Power Mac G5 and early versions of the mac pro. I am thinking of buying a Power Mac or early Mac Pro second hand and will upgrade the GPU myself and just want to know what PSU (watts) they have.
