2 My iMac will not load OS
My iMac will not load any os, I can hold alt and select any drive both internal and external, i can run new installation and format internal an external drives but once installation is completed and i try to boot os the progress bar goes across and it goes to blank grey/white screen.
i tried the following,
1) Switched hard drives
2)boot from external lion disk
3) changed ram
i don't think its the graphics card or sata cable because i was able to load and complete the OS X El Capitan installation.
Update (09/12/2016)
-- I've tried booting from an external HD (not the original drive, hooked via firewire and then by USB), a usb thumb drive (once with a Snow Leopard boot, then once with Lion) and of course the install disk. Displays the same behavior for all .
-- Attempted to boot in safe mode (CMD Shift):
-- --Displays apple screen with the progress bar
-- --fills the bar about 30%
-- --bar disappears and is replaced with spinning gear
-- --gear freezes, no boot
-- pulled and re-set ram in slots (not original RAM, but replaced w Kingston RAM when I got the machine in early 2008, and there have been no probs until now). Tried switching slots, tried each ram card alone in both slots.
-- PRAM Reset: CMD + option + P + R
-- SMC Reset: Unplugged for 15 seconds, plug and wait for 5 seconds, press power
It will go into single user mode, so i imagine the solution has to come from things I can do at that command line.
Please don't make me go to genius bar!
Update (09/12/2016)
After doing some indent research i found that this model has a 5 year recall/warranty on the GPU see video for details https://www.youtube.com/watch?v=QgQAtbum...
And this is what i used to repair. I now need to prevent my god core from hitting 200deg Cel or keeping as cool as possible
https://www.youtube.com/watch?v=9vPM41Zm...
I now need to prevent my GPU core from hitting 200deg Cel or keeping as cool as possible any ideas ?
Bu iyi bir soru mu?
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6 Yorum
How much RAM do you have in your system? You need to have a minimum of 2 GB. I do recommend upgrading to the max which is 6 GB.
Dan tarafından
I have 4 GB, it's not ram issue I tested them in another system
Nathaniel Mcintosh tarafından
Do you have an external monitor to test with?
mayer tarafından
Has a "?" symbol appeared during the process? It could be a faulty SATA connector.
Ben Eccles tarafından
@mayer i dont but i gonna try it with one, why am i doing this if the LCD on the current system works ?
@supportninja I changed the sata cable but it did not correct the issue
Nathaniel Mcintosh tarafından
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