IMac 20" A1224 (EMC 2133) LCD bright grey but no video

Hi All,
I have an iMac 20" A1224 (EMC 2133) LCD boots up bright grey but no video, not even the able logo or spinning gear. After waiting the normal amount of time, the machine responds to keyboard input, i.e., I can change screen brightness and get the machine to beep at me by hitting various keys. I attach the external monitor and it works perfectly.. shows the desktop background after the computer boots up. I even booted the machine up to Ubuntu 11.04 GNU/Linux and was able to surf the Internet while looking at the externally attached display. All the while, the iMac LCD stays bright grey. The only time I see even so much as a flicker is when the computer boots up to GNU/Linux, where it flickers quickly once but then returns to bright grey.
I've checked all the connections, I've run the command+option+p+r, I've unplugged the machine for over 12 hours and held the power button in and turned on power (to reset SMU), and I've disconnected the hard drive (shows a blinking folder if I have the external monitor attached and boot with the LVDS cable detached). I've even checked the LED lights - all four are lit.
Very Frustrating!
So now I'm left with trying to swap out parts.. An expensive idea to say the least!
$24 Apple 922-8167 Cable, LVDS
$250 ATI Radeon GPU
$190 Apple iMac Intel 20" LCD Screen M201EW02 v.B
Does anyone know a way that I can test to make sure which part to replace?
Thanks!
Shannon VanWagner
humans-enabled

Oh and for those who might end up in this same situation... I was able to get the externally attached monitor to be the main screen by first unplugging the LVDS connection (from the LCD display to the motherboard), then booting with the external monitor on and attached. This is nice because now I'm able to use the computer as normal (while viewing it in the external monitor), and I can run a time machine backup. I tried mirroring displays, gathering windows, changing the resolution and brightness and nothing has yet brought back the video on the LCD panel.
I still wish there was some type of testing software to check the GPU and tell me it's working perfectly... because then I could purchase the replacement LVDS cable / replacement LCD with confidence that replacing those items would fix the problem. Apple should attach these LCD panels with a DVI or HDMI connection internally... this way one could always (and easily) attach a monitor to the main output port and be able to easily isolate whether a video problem exists with the LCD/cable, or the GPU/Logic Board.
Also, what's up with the replacement ATI GPU being $250+? That's ridiculous because I can buy a decent 3d-gaming capable PCI-X 3d graphics card for my GNU/Linux computer for about $80.

Similar Messages

HT204291 Does anyone know why when streaming a movie from my iMac the screen on my tele goes grey but I still get audio. It only happens when using the DVD application on the mac. iPhoto streams fine.

Does anyone know why when streaming a movie from my iMac the screen on my tele goes grey but I still get audio. It only happens when using the DVD application on the mac. iPhoto streams fine.

You are prevented from Airplay mirroring certain things like DVD content as the material is usually protected so you get a checkerboard type display. I think there is a theoretical risk that the Airplay stream could be intercepted and the protected video copied, albeitin lower quality.
Apple may be being cautious or are required to do so with the DVD player app by movie studios/licensing authorities. It makes no sense to the average consumer who is just trying to send their purchased DVD to the TV via the computer and AppleTV.
Playback in something like VLC should work - not tried it myself but others have commented it doesn't have the restriction.

IMac 400 VGA Out to LCD Monitor works but CRT Display is Black

Hello.
Our church has an iMac 400 with the VGA out port in the back. We connect the iMac an LCD projector to display PowerPoint presentations.
Intermittently, the iMac's CRT display works, then the next time it may not work. Some Sunday mornings it won't work at all, though the desktop can be seen on the screen overhead because the Mac is sending the signals to the LCD projector, which worksf ine. If I disconnect the VGA cable and boot the iMac, then the display works perfectly. Everytime.
I've changed the VGA cable twice, thinking it was bad, but there is no consistent rhyme or reason why this occurs. Some Sundays, both the CRT and the LCD projector work as they should. Other times, only the projector works.
The VGA port always works because the LCD projector always displays the desktop. But the screen on the iMac itself is used as a viewing monitor of sorts for the speaker, and we need it to work properly (the speaker faces the iMac, while the screen for the LCD projector is over his head and behind him).
Any input would be appreciated.
Thanks,
RW Harris, Pastor
Crossview Community Church
CrossviewChurch.com
iMac DV 400 Mac OS X (10.4) 1 gig RAM

It sounds like you may already have the answer in your post... Dual Link versus "not compatible"
The only other thing I can suggest is to connect them up, then go to System Prefs --> Displays --> Detect Displays
That works for me when it doesn't connect immediately - but then again most of the time my display notices the input immediately

Laptop-mode-tools no longer adjusts LCD brightness

I just discovered that laptop-mode-tools no longer adjusts the brightness of the LCD when switched to battery. This is not a general issue. laptop-mode is active on battery (as well as being enabled via the systemd service), the computer knows it is on battery (checking with on_ac_power and reading from /sys/class/power_supply/*/* give the expected results) and other things are correctly adjusted e.g. bluetooth is blocked with rfkill. Moreover, as root I can adjust the brightness in the usual way by hand:
echo 10 >| /sys/class/backlight/acpi_video0/brightness
works just fine. The >| is needed because for interactive shell's, root's .bashrc sets noclobber. This obviously doesn't affect laptop-mode tools because it doesn't run an interactive shell. In contrast:
$ cat /etc/laptop-mode/conf.d/lcd-brightness.conf | grep -v "^#"
DEBUG=1
CONTROL_BRIGHTNESS=1
BATT_BRIGHTNESS_COMMAND="echo 7"
LM_AC_BRIGHTNESS_COMMAND="echo 10"
NOLM_AC_BRIGHTNESS_COMMAND="echo 12"
BRIGHTNESS_OUTPUT="/sys/class/backlight/acpi_video0/brightness"
DEBUG wasn't 1 when the problem started. I tried setting it to get more info but haven't found anything more in the journal/logs.
KDE is set to not touch the default brightness at all. All it does is (further) dim the display after so many minutes depending on the power supply and status.
This did work fine but I haven't been on battery for a while so I'm not sure when exactly it stopped working. My brightness is set by default to 12 on boot or wake from sleep which suggests laptop-mode tools does something or something else is now handling this which I'm not aware of. But the switch to battery does not trigger any alteration in the brightness and laptop-mode status does not even mention LCD brightness as one of the things laptop-mode tools controls.
Have I missed a change in how this is handled somewhere?

I doubt this is related but it is currently my only lead so here goes. I set the LCD brightness control for debug so I've been trying to watch it. However, so far it is all smiles e.g. on boot it all works fine and says so.
However, I found I'm getting another error on boot which is
/usr/share/laptop-mode-tools/modules/pcie-aspm: line 10: write error: Operation not permitted
Note that I copied that by eye from VT1 so if a colon is out of place, that's why.
The contents of that file is:
#! /bin/sh
# Laptop mode tools module: PCIe Active State Power Management
if [ x$CONTROL_PCIE_ASPM = x1 ] || [ x$ENABLE_AUTO_MODULES = x1 -a x$CONTROL_PCIE_ASPM = xauto ]; then
if [ $ON_AC -eq 1 ]; then
log "VERBOSE" "On AC power: setting pcie_aspm to default"
if [ -f /sys/module/pcie_aspm/parameters/policy ]; then
echo default > /sys/module/pcie_aspm/parameters/policy
if [ $? -eq 0 ]; then
log "VERBOSE" "PCIe ASPM set to 'default'"
else
log "VERBOSE" "PCIe ASPM tweaking is prohibited by the kernel"
fi
else
log "VERBOSE" "PCIe ASPM is not available"
fi
else
log "VERBOSE" "On battery: setting pcie_aspm to powersave"
if [ -f /sys/module/pcie_aspm/parameters/policy ]; then
echo powersave > /sys/module/pcie_aspm/parameters/policy
if [ $? -eq 0 ]; then
log "VERBOSE" "PCIe ASPM set to 'powersave'"
else
log "VERBOSE" "PCIe ASPM tweaking is prohibited by the kernel"
fi
else
log "VERBOSE" "PCIe ASPM is not available"
fi
fi
else
log "VERBOSE" "PCIe ASPM power savings module is disabled"
fi
So I assume it is saying it cannot write to /sys/module/pcie_aspm/parameters/policy but the permissions etc. on that, at least, don't look strange:
l /sys/module/pcie_aspm/parameters/
total 0
drwxr-xr-x 2 root root 0 Gor 25 21:24 ./
drwxr-xr-x 3 root root 0 Gor 25 21:23 ../
-rw-r--r-- 1 root root 4.0K Gor 25 21:24 policy
Last edited by cfr (2013-07-25 20:47:13)

2009 24-inch iMac 3.06GHz (EMC no. 2267). I don't get any audio when connecting my Sony HD TV to my iMac via mini DisplayPort. Is there a fix or hardware upgrade? I'm using a Kanex Mini DisplayPort to HDMI cable w/ audio support.

2009 24-inch iMac 3.06GHz (EMC no. 2267). I don't get any audio when connecting my Sony HD TV to my iMac via mini DisplayPort. Is there a fix or hardware upgrade? I'm using a Kanex Mini DisplayPort to HDMI cable w/ audio support.

You can connect the audio from your iMac to your TV using a mini jack (like headphones plug) to rca (regular red and white audio connectors used on every TV,DVD, etc) cable.
On your TV, you need to be able to set the audio for the HDMI input you will use to "analog" and connect the rca end of the cable to the analog inputs on your TV.

Sony Vaio FZ Series - LCD brightness

Hi All,
I have recently bought a Sony VAIO FZ11S and I've successfully installed Archlinux:
Fully working:
- CPU Scaling (using cpudyn)
- Multimedia keys (mute, volume up/down, play/stop, etc. using Xmodmap)
- Wireless (using iwl3945. Can't connect with AP with hidden SSID)
- Nvidia GeForce 8400M (using latest nvidia drivers with stock arch kernel 2.6.23)
- Audio (after adding 'options snd-hda-intel model=vaio' to /etc/modprobe.conf. MIC not tested yet)
Untested:
- bluetooth
- SD/MS card reader
- Video camera
NOT WORKING:
- LCD brightness adjustment: FN+F5/F6 are detected correctly by acpid but nothing happens. I'm using the module sony-laptop included with kernel 2.6. Folder /sys/class/backlight is empty. I can use nvidia-settings to change COLOR BRIGHTNESS but this is NOT a good solution IMHO. I'd like to get the same capabilities I get running Windows Vista. (change LCD backlight).
I've read somewhere it is a problem common to all laptop with the same NVIDIA videocard. Does anyone know a fix for this? I've also tried with latest nvidia beta drivers with no success.
- Hibernate/suspend. I tried with pm-tools to suspend/hibernate laptop but nothing is working correctly. I didn't investigate further. Has anyone got a quick solution for this?
lspci output:
00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 0c)
00:01.0 PCI bridge: Intel Corporation Mobile PM965/GM965/GL960 PCI Express Root Port (rev 0c)
00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Contoller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 3 (rev 03)
00:1c.4 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 5 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3)
00:1f.0 ISA bridge: Intel Corporation 82801HEM (ICH8M) LPC Interface Controller (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) IDE Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA AHCI Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 03)
01:00.0 VGA compatible controller: nVidia Corporation GeForce 8400M GT (rev a1)
06:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
08:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8036 PCI-E Fast Ethernet Controller (rev 16)
09:03.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
09:03.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE 1394 Host Controller
09:03.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD)
Please help
V.
Last edited by Vins (2007-12-09 11:37:08)

I recently bought a Sony FZ180, almost identical stats and hardware.
I tried all the same suggestions, which worked fine on my old laptop, but will not for this one. If anyone can think of another method to control the backlight I would be grateful.
Also, I tested the SD slot, the TI driver recognizes when a card is inserted, but no devices or mount-points are created.
tifm_core: MMC/SD card detected in socket 0:1
tifm0 : demand removing card from socket 0:1
(The second line is from me removing the card, not a defective slot.)
Everything else works great, though. Arch boots to a full KDE desktop much, much faster than my cleaned-up vista partition. I'm really happy overall.

LCD Brightness, sony_acpi from aur won't build

I'm using a Sony VAIO vgn-sz430n, and the Fn keys won't work to change the brightness. I'm not so concerned about the Fn keys, for I've seen tons of documentation to get those working with xbindkeys, xmonad, openbox, etc. and I will worry about that later.
Most importantly, I cannot change the screen brightness. Xbacklight does not do anything, laptop-mode-tools and gnome/xfce4-power-manager do nothing. The screen brightness is always at the maximum.
I have an nvidia Geforce Go 7400 card with the proprietary nvidia driver
I read that I need the sony_acpi module, and I've been trying to install it from the AUR, but I get errors and I don't know what to do. I've tried with yaourt and manually. Here are the results from yaourt:
==> Building and installing package
==> Making package: sony_acpi 1-1 i686 (Sun Jun 14 14:56:12 CDT 2009)
==> Checking Runtime Dependencies...
==> Checking Buildtime Dependencies...
==> Retrieving Sources...
-> Found sony_acpi.tar.gz in build dir
==> Validating source files with md5sums...
sony_acpi.tar.gz ... Passed
==> Extracting Sources...
-> bsdtar -x -f sony_acpi.tar.gz
==> Removing existing pkg/ directory...
==> Entering fakeroot environment...
==> Starting build()...
make -C /lib/modules/2.6.29-ARCH/build SUBDIRS=/tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi modules
make[1]: Entering directory `/usr/src/linux-2.6.29-ARCH'
CC [M] /tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi/sony_acpi.o
/tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi/sony_acpi.c:55: warning: initialization from incompatible pointer type
/tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi/sony_acpi.c: In function 'sony_walk_callback':
/tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi/sony_acpi.c:253: error: dereferencing pointer to incomplete type
/tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi/sony_acpi.c:255: error: dereferencing pointer to incomplete type
/tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi/sony_acpi.c:256: error: dereferencing pointer to incomplete type
/tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi/sony_acpi.c: In function 'sony_acpi_add':
/tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi/sony_acpi.c:269: error: lvalue required as left operand of assignment
make[2]: *** [/tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi/sony_acpi.o] Error 1
make[1]: *** [_module_/tmp/yaourt-tmp-agi/aur-sony_acpi/sony_acpi/src/sony_acpi] Error 2
make[1]: Leaving directory `/usr/src/linux-2.6.29-ARCH'
make: *** [default] Error 2
==> ERROR: Build Failed.
Aborting...
Error: Makepkg was unable to build sony_acpi package.
The strange thing is this works in other distributions, such as Ubuntu. If I fired up a live cd and tested out my Fn keys, the brightness would change and there would be an on screen display for feedback.
What is Ubuntu doing, specifically, that Arch is not doing? Is there any way I could load an ubuntu live cd and then find what files/programs/modules/whatever are in place that allow brightness changes? Does anyone know this offhand?
Help!

I have Sony Vaio VGN-FZ38M with Nvidia 8400M GT. I used package 'nvclock' (it is in repo) to control lcd brightness, here site with more info: NVClock. Some time ago I also configured Fn keys to work with it (on Ubuntu), but on Arch I didn't manged but I didn't try hard (in general i don't need, my laptop is stationary all the time). Solution I've found somwehere in Ubuntu forums.
edit: typo in address
edit2:
here's the solution from Ubuntu: http://newyork.ubuntuforums.org/showthr … ?t=1004568
Last edited by folletto (2009-06-14 20:58:56)

Laptop-mode / laptop-mode-tools lcd brightness issue

I have an issue with my lcd brightness config in laptop-mode tools
here is the brightness values
[venky@ARCHROCKS ~]$ cat /proc/acpi/video/VID/LCD/brightness
levels: 72 24 12 24 36 48 60 72 84 100
current: 72
[venky@ARCHROCKS ~]$
following is my lcd-bightness.conf file under /etc/laptop-mode/conf.d
# Configuration file for Laptop Mode Tools module lcd-brightness.
# For more information, consult the laptop-mode.conf(8) manual page.
# LCD brightness settings
# Using these settings, you can make laptop mode tools automatically adjust
# your LCD's brightness settings. The settings are extremely simple -- they
# only allow for the execution of a command, nothing more. The reason for this
# is that LCD brightness settings are very different between laptop vendors.
# Suggestions for commands:
# * If your system has the file "/proc/acpi/video/VID/LCD/brightness" (VID may
# be VID1 or similar), use this file as BRIGHTNESS_OUTPUT, and use
# the command "echo <value>". The possible values can be listed using the
# command:
# cat /proc/acpi/video/VID/LCD/brightness
# * If you have a file /sys/class/backlight/.../brightness, then you can use
# that file as BRIGHTNESS_OUTPUT, and the command "echo <value>".
# As far as I understand it the values are between 0 and
# the value contained in the file /sys/class/backlight/.../max_brightness.
# * For Toshiba laptops, use the command "toshset" with the -lcd or -inten
# command. Read the toshset(1) manual page for more information on the
# parameters for this command. If you use this command, set
# BRIGHTNESS_OUTPUT to "/dev/null".
# IMPORTANT: In versions 1.36 and earlier, these settings were included in the
# main laptop-mode.conf configuration file. If they are still present, they
# overrule the settings in this file. To fix this, simply delete the settings
# from the main config file.
# Should laptop mode tools control LCD brightness?
CONTROL_BRIGHTNESS=1
# Commands to execute to set the brightness on your LCD
BATT_BRIGHTNESS_COMMAND="echo 24"
LM_AC_BRIGHTNESS_COMMAND="echo 100"
NOLM_AC_BRIGHTNESS_COMMAND="echo 72"
BRIGHTNESS_OUTPUT="/proc/acpi/video/VID/LCD/brightness"
so basically while in AC power i want full brightness when on battery i want one notch more than the minimum brightness and when laptop-mode is not running i want 2 notches less than maximum brightness.
the battery mode works fine when i unplug the computer but when i replug the AC power it goes to 72 instead of 100. I mean laptop mode is running coz when I remove ac power it goes to 24 again.
Am I doing something wrong?

When you plug in AC power, laptop-mode probably turns down, so LCD brightness is set to 72. It depends on if you have set in /etc/laptop-mode/laptop-mode.conf ENABLE_LAPTOP_MODE_ON_AC to 0 or 1.

No sound on iMac Intel 24'' EMC 2267 after hard drive replacement

I replaced my hard drive on my iMac Intel 24'' EMC 2267, due to numerous bad blocks, by following all the instructions on iFixit.com. I did not experience any problems.
I then installed all my files from a Time Machine backup. There were no problems with the restoration of my files. It seems that my new hard drive works beautifully.
However, one serious problem I have is that now there is no sound on my iMac. There is no startup chime, and there are no other sounds. When clicking on Sound in System preferences, it says that there are "no output devices found".
When opening system profiler, in the Audio (built-in) tab it says "Audio ID: 0"
I re-opeend my iMac to make sure that all cables were connected properly, and I did not manage to spot any problems.
I tried to reset PRAM and EMC but these did not solve the problem. I am working under MacOS X 10.6.8
Can someone help please? Any information provided will be most appreciated. Thanks in advance for your support.
Regards - Gina

I think when you replaced your hard drive you bumped into the daughter board and that is for the sound and the wireless, You need to get another daughterboard or contact the Apple Store if your Mac is stilll under warranty.

Where can I find a logic board for iMac G5 17" (EMC No. 1989) Apple Part

HI Where can I find a logic board for iMac G5 17" (EMC No. 1989) Apple Part #: 661-3290, 661-3351?

Thanks--makes life easier!
I found DV Warehouse has a number of G5 logic boards but none had the exact model number:
http://www.dvwarehouse.com/iMac-G5-Logic-Board-c-4771.html&pltid=05fedd9f246e2a1 dbc9f35cd6712e781
They have a toll-free number. You could ask if another board # would be compatible.
Another option is to contact recylers or schools shucking off older gear. Using the enigma of " A used computer is worth more parted out," you might be able to pick up another G5 cheaper than its LB. Unless the LB had the dreaded "leaky capacitor" failure, most computers don't get discarded for a bad LB.

Does iMac 2009 A1224 support DDR3 1333MHz Ram or not?

Hi, I got lucky and came across a free set of 4GB 2Rx8 PC3-10600S-09-11-F3 Ram. My question is, if an iMac model A1224 supports 1333MHz or not?
Any help greatly appreciated
Cheers

It supports:
Maximum Memory
8.0 GB
Memory Slots
2 - 204-pin PC3-8500 (1066 MHz) DDR3 SO-DIMM
You cannot use 1333 MHz memory in that iMac.

IMac won't start up passed the grey screen

Last friday my iMac (late 2006, 24", 2.33 duo core Intel, OS 10.6.8) gave me the spinning beach ball.
Restarting resulted in: first the apple screen with the progress indicator, followed by grey screen..
That was it. It hangs at the grey screen.
I've been busy this weekend testing all kinds of ideas to get my imac to fully start up again.
I checked the RAM, it's fine.
I flushed NVRAM, wild guess, but nothing changed.
Starting up in safe mode doesn't work.
Starting up in recovery mode doesn't work.
On the upside, I was able to start my imac up in Target mode. Using the host computer and Disk Utlity I can see there's nothing wrong with the HD. All the data is still there!, so later today I'll make a copy of the complete HD, hoping/thinking that I won't copy whatever is wrong.
I had Disk Utility repair all the permissions.
I've used the host computer to reinstall the OS on my imac.
But on start up my beloved iMac still won't get passed the grey screen.
I'm thinking something goes wrong before my Mac even gets to the HD. Maybe it's the firmware, but I'm not really sure that firmware matters in this case. And I wouldn't know how to reinstall the latest version of firmware because my imac won't start up from it's disk drive
I'm thinking maybe something could be wrong with the graphic card's RAM, though on start up I can see the apple logo just fine.
I'm not able to start up from CD, I've tried that because I wanted to reinstall my OS (before I figured out how to do that in Target Mode) by putting the OS disk in my imac's own disk drive. Staring up with the C key still gets me the grey screen. Staring up with Option key shows no other option but the HD.
So is there anybody out there who has an idea that could help me further along?
Any help is greatly appreciated!
Frank

Hi Jan,
If you have another firewire Mac you can check if the HD of your Mac is OK by connecting them with a firewire cable and use target-mode. That way I found out my HD was just fine.
It also offers you the chance to run a diagnostic program to check if anything else is fine. I used TechTool to do that. But everything checked out fine.
In the end I decided the problem is probably hardware. Some electronic part that broke. Very frustrating that some small transistor or so is keeping me from using my otherwise fine iMac.
I contacted a repairshop that also works for the local Mac retailer. They told me my iMac was concidered 'classic' and therefor it wasn't economically not worth the trouble trying to repair it.
I gave up, took two weeks to mourn the loss of my beloved iMac, and bought a Mac mini.
FrankV
Judging by your name I'm guessing I could've anwered this in Dutch.

Hi my iMAc 27 inch starts up to the grey screen with apple logo and loading bar underneath it loads halfway then freezes up and shut down after a while please help

Hi my iMAc 27 inch starts up to the grey screen with apple logo and loading bar underneath it loads halfway then freezes up and shut down after a while please help

Try the tips listed here Mac OS X: Gray screen appears during startup - Apple Support

TS1398 The wifi tap button won't slide from off to on, remaining in light grey color rather than bright grey.

The wifi tap button won't slide from off to on, remaining in light grey color rather than bright grey.
And it's not as if not in an area where wifi is not available.
Any words of advice?

The wifi tap button won't slide from off to on, remaining in light grey color rather than bright grey.
And it's not as if not in an area where wifi is not available.
Any words of advice?

HT3932 Wireless Keyboard Update 2.0 his update doesn't work! I'm at 10.5.8 on my old iMac G5, installed the update and brightness and volume just do not work. What next?

This update doesn't work! I'm at 10.5.8 on my old iMac G5, installed the update and brightness and volume just do not work. What next?

I have a brand new wireless keyboard... so it's never going to work. BUT... I found a sort of work round!
Since it's eyeTV that I want to control the volume more than the system volume I discovered cmd and up/down arrows do the job. I gess I'll forgo the brightness function.
I'm a little frustrated that it appears Apple seems to want to push me towards an upgrade of a perfectly serviceable iMac G5. I'll be keeping it to watch TV, surf the web, wordprocess and let the macbook pro handle photos & video.

IMac 20" A1224 (EMC 2133) LCD bright grey but no video

Similar Messages

Maybe you are looking for