Command + Option + P + R keys do not work
Hello world
I have a 2 models of macbook pro 2010. When I first got them I gave each a password firmware, but for some strange reason, one of them the password does not work! So I need to reset it. I read the forums where it says to remove 1 stick of RAM (fact), reset the SMC (which is), then hold down COMMAND + OPTION + P + R hown to reset the PRAM.
Problem is to keep these keys does nothing. The macbook starts just to the top as usual. GRRR! It's infuriating! I've tried everything. I also met several other MacBook & macbook pro in the past when he had the chip of ram only 1 I tried to case.have, 2 chips of RAM, Exchange autour, new ram, and 3 other different types of RAM, still the same problem. I have 2 x 2 GB ddr3 1333 mhz in there. I tried chips to 4 gb and 8 gb chips as well. Why the these keys are not suitable? I just don't understand and it's very frustrating because it works just fine on the other macbook pro and the specification and even the model is exactly the same thing...
I know that the keyboard is OK because the holding CONTROL + OPTION + SHIFT and the power button to do an SMC reset works very well. and Yes, I tried to connect a wired usb macintosh keyboard. These keys do not work either and I know that the keyboard is fine because it works on the imac. I find it confusing that google has no answer for that, surely someone else has had this problem?
You can reset PRAM with Terminal too: http://osxdaily.com/2015/12/16/view-clear-nvram-mac-command-line-osx/
Tags: Notebooks
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Post edited by: Telico
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Microsoft Answers Support Engineer
Visit our Microsoft answers feedback Forum and let us know what you think
One or more keys on the keyboard do not respond
https://support.Apple.com/en-us/HT203162
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