Rispondi a "See lock Icon when Option button is pressed at system start up"I used this answer from Dan Frakes at Macworld. This worked for me on an Apple G4 iBook 1.07GHz model. I had just changed out the hard drive on this laptop that I bought off of eBay from a school district. Dan's solution: There’s a back door to firmware passwords: You can bypass the password by changing the amount of physical RAM inside the computer and then resetting PRAM during the first boot immediately after the RAM change. In other words, if you change the amount of RAM in a Mac, it will start up normally one time to give you a chance to reset the PRAM; if you don’t reset the PRAM during that boot, firmware-password protection will be restored the next time you boot.
Rispondi a "Can not get pass the question mark folder"Have you attempted to start up the laptop via an external USB hard drive that has an OS X image on it? If not, attempt to do this. If the laptop starts up fine, the problem is located within the laptop. I would certainly look close at the internal hard drive cable and/or the hard drive itself as the source of the problem.