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모델 A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 또는 2.8 GHz Core i7 프로세서

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Supersized flashing folder & keyboard locked out

I have An iMac 2011 That has a super large flashing folder icon. I cannot get it to go into recovery, pram reset or even to see if there is an Efi lock. It will not recognize the keyboard. I can attach a wired mouse with the red IR light and it lights up so I know there is power. It doesn’t look like the mother board was ever removed and it looks clean so I’m not sure why the keyboard is locked out and I have NEVER seen such a large sized flashing folder icon-it’s almost twice the normal size. The screen is an lg screen ….I removed both ram sticks and I can get the long Missing ram beeps. It’s some kind of lock. Oh I also replaced the PRAM battery but that didn’t help.

Update (08/13/2020)

just to clarify….I refurbish Apple products. This isn’t a simple problem. I am using a wired keyboard (ugh) and I have a flash drive and an external bootable. Not one person noticed the title about supersized flashing folder??? 

I was hoping for some expert solutions or input. Maybe Mayer or old turkey

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The older iMac’s startup commands often won’t work property via a Bluetooth keyboards make sure to use a USB wired keyboard.

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The flashing Question Mark in a Folder is the system telling you it can’t find a working boot drive with the needed macOS If your Mac starts up to a question mark

References:

Do you have a second Mac system which you can connect your system to or have a bootable external drive to boot up your iMac?

Update (08/13/2020)

I wish you had posted your images beforehand I would have then been able to explain the size issue upfront.

The scale is all subjective! What one calls normal, large or super sized is not a firm measure. Using a ruler with some level of standard graduations is much better when you see something out of sorts (or posting pics that clearly show it). As I was thinking what the desktop icons are in size as normal and the EFI one (what you are seeing) is large or what someone might call super sized.

At this point you’ll need to unplug the AC power cord as well as take the PRAM battery out. then let the system sit awhile so the capacitors have a chance to discharge. Install a fresh PRAM battery, reconnect things and the displays image should be normal.

OK, let's look at the keyboard issue. Are you using one with a Lightning cable connection? The newer Apple Bluetooth keyboards use a lighting to USB cable so they can be charged. The keyboards signal is still Bluetooth even when you use the USB cable! Which could explain why the keyboard commands don't work.

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Omg please see title supersized folder icon....I know what the folder icon means I was asking about the locked out keyboard and the supersized folder

Yes! The folder with a blinking question mark as you have in your images is what you see went the systems HD goes bad or the Startup Drive setting is messed up.

The fact yours is larger that what you where expecting gets into the systems display settings being messed up

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