IMac :: LCD Backlight Bleed / Reset The PRAM Which Figured Wouldn't Work?
Sep 13, 2009
So I contacted Apple this morning regarding the LCD Backlight Bleed on my iMac (24", early 2008, 2.8 ghz) They made me reset the PRAM, which I figured wouldn't work, and the issue is still there.
They say it'll have to go in for servicing, and I live nowhere near an Apple Store, so they gave me the location of the nearest London Drugs. Am I going to get the same quality of service as I would from an Apple Store? And what is the exact process that they use, do they just replace it with a new LCD?Also, he said that it will be covered under Applecare unless it is ruled as accidental damage, he said that much of the time, the issue is caused by pressure on the back of the case, and that if that was the case, it wouldn't be covered.I can't really see how this would cause it, and I haven't ever put any pressure or anything on the back, but i did buy the iMac used, what are the chances of this being ruled accidental damage?I have the bleed in all four corners of the screen, if that makes any difference.
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Dec 2, 2009
Just received my new imac today and everything is perfect, quiet drive, no stuck pixels excellent apart from some bad backlight bleeding which can be seen on black screens. It's particularly bad at the top and the sides.... Does anybody else have this and should I risk sending it back??? I have a 52 inch lcd sony and that doesn't suffer at all from back light bleeding...
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Aug 27, 2014
I wasn't able to edit and was having issues on this site earlier (access denied) I'll try to make this as short as possible. I have a Macbook Pro (late 2011) running OS X 10.9.4Today I was typing in a website address for work and instead of that homepage I had hostprivilege.com come up with something about Norton anti virus, virus not removed, i can't remember exactly but something along those lines. Also a small pop up window showed up to call an 1 800 number with the ok button highlighted Everytime I hit the ok it would pop right back up.
I was unable to click anything else front ehSafari drop down box except for the quit button. When I did and came back on it was till there. I finally kept clicking the ok and reset Safari and after frantic clicking was able to reset. What that was and should I be concerned? I was leery about logging on even to this site or any other until I know that happened. I don't know if it has anything to do with it but I got a red error message bar a couple of times while in the site and when trying to change my avatar, I had a access denied on the server message.
Info:
MacBook Pro, OS X Mountain Lion (10.8.2)
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Mar 21, 2012
I am running Mac OS Lion (10.7.3) on a 8-core Mac Pro. As I turned on my mac this morning, I found out that I was unable to use my wireless mouse, and also that I couldn't open my bluetooth settings. Apparently, the entire module disappeared from the System Preferences, and when I went to one of the articles on here, I saw that I'm supposed to reset my PRAM and SMC in order to make my bluetooth work again. The problem is, that I don't know what PRAM or SMC are, nor do I know how to reset them.
Info:
Mac Pro (Mid 2010), Mac OS X (10.7.3)
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Aug 9, 2009
I have already covered these steps:1. I have tried a safe boot. 2. I have tried to reset the NVRAM and the PRAM.3. I have tried to reinstall OSX from the Install Disk.4. I have tried to repair the HD and tried to repair permissions using the Disk Utility. he issue started out as the flashing Apple/Question Mark Folder/"No" sign. I attempted to follow the steps on the Mac Support Forums (ones listed above) and the issue developed into the picture shown.
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Jan 20, 2009
I have a 17" Powerbook G4 1.5 GHZ. I lost all sound from one moment to the next. System preferences says Audio output Headphones however no sound from Headphones either. I tried to reset my PRAM, however when I hold down "Option" "Command" "r" and "P" the computer won't restart. The hard drive seems to be stuck at this point and won't go any further. I went to the Apple store and the Genius lost patience and said we should send it out. (I'd rather not)
I have also reset the PMU
Everything else works fine.
I've looked at several other threads and post. Everyone with a sound problem seems to be able to get it resolved with a PRAM reset. However I find nothing on my the problem of not being able to reset..
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Mar 6, 2012
I have a MBP 13inch from 2011
recently i zapped my Pram becuase i was having trouble with a external screen but when I turned it on again the screen when to the grey screen with the apple logo and spinning gear but after 2 hours of wating the screen is still the same. What can i do to get back onto my mac?
Info:MacBookPro, Mac OS X (10.6.8)
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Sep 7, 2014
I have inadvertently left my 2011 MBP running with a processor intensive music app running. The battery ran out before i realised.. When i attached the power lead to charge it, the computer automatically restarted without even pressing the power button. The computer had not entered safe sleep mode, presumably because my music software was still running.
Since then the computer will not ever enter safe sleep when the power runs down. The battery just cuts out each time when it drops to less than 5%, it does not run out at 0% like it usually does. if it is the logic board battery because i have had this issue a couple of times before but it rectified itself after a few days. I have checked that safe sleep is enabled which it is, but the computer just cuts out before safe sleep kicks in.
Info:
MacBook Pro (13-inch Early 2011), OS X Mountain Lion (10.8.5)
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Nov 30, 2007
I have tried two different brands of blank CDR in my drive and both times, they fail to mount and in Disk Utility, show up as Sony DVDs (neither of them is a Sony or a DVD), but not writable. I have no problem with media that already has content. I've tried resetting PRAM, but nothing else yet.
Information:
Powermac G5
Mac OS X (10.4.10)
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Feb 25, 2008
I tried the SMC & PRAM reset. Now, there is a delay in my keyboard and mouse. For example as I am writing this, as I type, I am observing a ~1/4 sec delay between me pressing a key and the GUI registering it. The same with the mouse. I can click-and-hold over say File and move it up and down over subsequent menu items and it the GUI doesn't highlight the menu item unless I slow down the movement.
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Aug 15, 2010
Can someone explain to me why resetting PRAM on a machine has any effect whatsoever for networking issues? ie; self assigned ip etc. I have noticed this is a common troubleshooting step that a lot of people are recommending for issues related to networking.
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Mar 12, 2012
when i do a PRAM reset, they will prompt me for a password or serial, may i know what password or serial is that?
Info:
MacBook Pro, Mac OS X (10.7.3)
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Jun 29, 2012
When exactly do you need to reset the SMC, PRAM or repair permissions?
Info:
iMac, Mac OS X (10.7.3), iMac Late 2009
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Aug 22, 2014
Updated to OS X Mavericks last week. Ever since, it has been experiencing boot problems.
- If I restart my Macbook Pro (2011 13", lowest model), it will sit at the grey screen with apple logo and spinning grey wheel forever. I notice that my HDD is NOT running (no clicking / writing sounds)
- If I restart with a PRAM reset or holding down option to select Macintosh HD boot, the hard drive starts to run (I can hear it) and it boots successfully... it takes 5+ minutes to boot up. The grey screen with apple logo is presented on my screen for about 4 minutes, then the login screen shows up but I cannot move my mouse or select a login user for 30 seconds. After this, I can log in succesfully.
-Also, switching users takes 1+ minutes. Clicking "switch user" freezes my screen.
Info:
Mac Pro
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Dec 2, 2014
Recently my MacBook Air has failed to wake from sleep mode. The Apple illuminates on the back of the screen casing, but neither the screen nor hard drive actually wakes up. The only way I'm able to use the computer is by forcing a PRAM reset on restart (command-option-P-R). I've had to do this several times in the last two weeks.
The only things about my MacBook Air that have changed in that time period are:
- I installed OS Yosemite
- I installed and ran Sophos Anti-Virus
(The latter was installed to counteract a problem that I was having with my email address having been spoofed and sending spam. Sophos found two bits of malware in email data files and "cleaned" them up.)
Info:
MacBook Air, OS X Yosemite (10.10.1)
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Jun 17, 2010
I've got two iMacs in my posession currently from getting replacement machines. Both have screen issues as follows: iMac A - dead & stuck pixels, feint grey horizontal bar running along bottom portion of screen, bottom left corner has noticeable backlight bleed. iMac B - dead & stuck pixels, yellow tinge in bottom portion of screen. So here are my questions. Which iMac should I keep and submit for repair? (does it matter and why or why not?) How does the actual repair get done? For example, if I submit iMac B for repair, could I end up with a grey bar or backlight prob like in iMac A?
Are there multiple layers to the display when they fix specific issues? For example, let's say the dead pixels are on one layer while the yellow tinge is on a different layer, or are both issues on the same layer? I ask because if there are two or more separate layers, there is more of a chance to mess up so I may want to submit the iMac that has the least amount of issues.
Lastly and most importantly, has anyone submitted their iMac for screen repair for these issues and got it back 100% repaired? (no dead/stuck pixels, yellowing, grey bar, backlght bleed) These are #4 and #5 in terms of the number of replacements I've gotten now and I'm sick of it so I may opt to go for repair on either of these existing machines instead of going for replacement #6. But do you think a 6th replacement would be better than going for repair on either of these? Or not?
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Aug 22, 2010
Today I noticed that my mid 2010 MBP is not automatically sleeping. I ran Apple's extended hardware test, along with TechTools Pro 5 from AppleCare disk. Both passed. Reset the SMC and PRAM. I'm still not able to auto sleep. Is there a way to see what exactly is causing my computer to not automatically sleep? Console messages or something?
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Apr 9, 2012
When I restart my Mac it chimes several times as if the PRAM is being reset. Could this be telling me my internal battery is dead?
Info:
Mac Pro, Mac OS X (10.6.8), 8 core 9gb RAM
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Jul 9, 2009
I recently purchased a 13" 2.26 stock macbook. It's perfect, screen is good (no scrolling issues or purple blues) with no dead pixels, no slanted keys, and no scratches.
I updated the firmware that addresses the SATA 1.5 issue. After the update, I reset PRAM. I held down the buttons till I heard the second or third startup bong.
Here is where it gets funny.
Now, when I reboot or start up my computer, the start up noise is loud. Even with headphones plugged in and also the volume turned to its lowest setting (even with volume turned off). Eventually, to control the startup noise, I had to install the startupsound program in my system prefs as mentioned on other threads and that has seemed to control the startup sound.
I was wondering, if by resetting the PRAM if I have harmed my computer in any way. Should I be worried about deeper issues with my computer since the startup sound was not previously being affected by reducing the volume to zero with headphones plugged in?
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Jul 19, 2009
I understand the steps needed, but how many times should I reset the PRAM and how many times should I here the startup sound (in total) before releasing the buttons?
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Sep 11, 2009
I attempted to reset the PRAM on my macpro running snow leopard this morning, by rebooting and holding cmd-option-p-r until the apple logo appeared, at which point I released and then machine then rebooted a second time. I went back to the computer about an hour later and it was stuck on the apple logo screen, with no sounds coming from the CPU. I did a hard reboot by holding down the power key and it started up fine. I've never reset the pram before and so I didn't know what I should expect as far as the process being successful, but after an hour stuck on the apple logo I figured it got stuck on something.
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Feb 25, 2006
I have a G4 MDD Dual 1.42ghz, When I hold down the Command-Option-P-R keys during restart it doesnt do anything. It keeps going straight to the gray screen and starts up. I dont know what to do. Anyone know whats the problem? Also my computer cant wake up from sleep or even go to sleep all the way.
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Apr 29, 2012
Firmware password will not reset. Resetting PRAM fails. Resetting NVRAM in Open Firmware fails. Resetting PMU fails.
Info:
MacBook Pro, Mac OS X (10.7.3), (MacBook pro 8,1)
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May 18, 2012
I have tried SMC and PRAM resets, and the issue has not been resolved. My magsafe is lit up with a bright green led. Battery status is "Not Charging." When I unplug the magsafe, the system immediately shuts down. Battery is brand new with only 2 cycles. While I can use the laptop with power connected, this is an issue that needs to be corrected asap, as I use this computer for performances consistently and if the power cord gets removed, I'm not in a good place.
Info:
MacBook, Mac OS X (10.6.8)
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Jun 26, 2012
I lost the startup tone a couple days ago. I repaired permissions, did an SMC and PRAM reset and it makes the tone while doing the PRAM reset but the next time you turn it on it doesn't make a sound.
Info:
iMac, Mac OS X (10.6.8), 3.2 GB Dual Core
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Jan 8, 2011
My macbook pro won't boot past the grey screen, I've tried reseting PRam, running fsck from single user etc to no avail. All signs would point towards a hard disk failure, but the curious thing is that it sometimes mounts in disk utility when booting from the install CD, so theres a little life left in it yet! I have fairly recent backups of most of my files, but there are a couple I've been working on in the past few days that won't be backed up. So my question is this - is it possible to copy files from my mac HD onto a external drive through the terminal/disk utility while booting from the CD.
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Apr 15, 2012
I have a MacBook Pro running it's latest update (10.7.3) , and would like to reset the keyboard light and the desktop light to it's default.
Info:
MacBook
Pro, Mac OS X (10.7)
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Jan 16, 2009
So I partitioned my MacBook's hard-drive so I could put Windows 7 on, using BootCamp. That all went well, except for some reason, the Windows 7 wouldn't work on the partition, according to the installation program. So I thought "Oh well, I already have Vista and XP on Parallels." I returned to OS X, and went to Disk Utility. I erased the partition I created, and when I tried to resize the original partition afterwards (so it took up the whole hard-drive again), it... failed. The computer froze.
I held down the power button for several seconds, and then it shut off. When I tried turning it on again, the computer said "No bootable device found. Insert bootable drive and press any key."
(Just for giggles: imagine a 16-year-old kid who paid $1600 to get a computer in this situation. Yeah, that's me.)
After I calmed down from my panic attack, I restarted it again and held down the option key. Thankfully, it gave me the option of starting in "Macintosh HD." Everything fixed... right?
Wrong.
I was on the MacRumors forums when my computer froze (stupid "grey screen," and it makes your music skip over and over which is really annoying). When I shut it off and turned it on again, once again it gave the same warning about a bootable device!
What do I have to do to make it so the HD is the bootable device?
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Jul 22, 2009
I have a powerbook g4 17 in a1107. The back light does not work. I am not at all sure what the display resolution is. If I install an lcd screen with anything other than the original resolution, will the notebook be able to support it?
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Jun 7, 2010
I have had my Macbook for almost three years now, and for the last month, the backlight for my screen has gone off. However, when I put the brightness down to 0 when the light is off, and put it up by 1 it sometimes turns on for a couple minutes/seconds/hours. Any help? By the way, I am using Boot Camp, I do not know if this happens on my Mac Side, because it comes up with a "stop" sign when I try to boot it up.
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