Does my iMac 2011 have dead GPU? Unusual symptoms
Hi there,
I know about iMacs 2011 tend to have dead GPU but I wish to know 100% before I start deep messing around in it.
So when power on - it has “chime” and black screen - I hear HDD is loading something - and nothing else happening.
When I insert my old MacOS Panther DVD to boot from it while connected to TV via minidiplay to HDMI cable (which 10000% works) then……….. it beeps 3 times - 2 seconds and then 3 beeps and so on (I know 3 beeps and………. 5 seconds is RAM problem) and I swapped with good know RAM and same thing.
I know to see video from MiniDisplay “drivers” must load up (so fully loaded Recovery or Login Screen) but what if HDD + LCD is dead?
I would do HighSierra USB install disk - but I have Windows 10 only and it is too messy to make install disk.
Those 3 beeps while macOS from DVD install is confusing me.
Thank You for help
Questa è una buona domanda?
Lets give this a try, restart your system and press the T key to enter into Target Disk Mode. Do you see the FireWire and ThunderBolt icons on your screen?
Reference: Mac startup key combinations
You'll want to use a USB keyboard.
da Dan
Black screen Dan :(
da Bart
@danj
Hi Dan
So I've opened it up and......... I got SHOCK
NOT A SINGLE piece of dust inside - I've disassembled it completely - it is NEW inside - not a single piece of dust inside radiators - it is shiny inside - warranty stickers on GPU and CPU intact - GPU card is like NEW - not a single piece of dust - inside fans - they NEW - if I had Mac Pro I would check how long that HDD was on but I dont.
Even if someone wold submerge it - still there should be some marks of dust - but NOTHING
Madness
da Bart