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Replaced optic drive successfully. Now the controller lags terribly. I’ve read that it’s something wrong with a Bluetooth component on the motherboard. It’s just weird because I barely touched the MB when I replaced the Drive. But any help is appreciated. Thanks

Sounds like you have a problem with the WiFi antenna. First, check to make sure that the cable is plugged in under the power supply as it should be. If that’s OK then you’ll also want to check the large metal part that is on the disc drive. Check to make sure that the small wire is still soldered on to the large metal piece. I suspect that you may have forgotten to plug the cable back in under the power supply but it very well could be broken on that large metal piece in the front as well.