Okay umm I swapped out my HDD for a Seagate Momentus XT some time back, even though my warranty isn't over yet (it had 1 more month left). Anyway I had a motherboard replacement a month ago, but it seems to be acting up a bit, such as the sound turning on and off intermittently, and the computer occasionally shutting off by itself due to lack of power despite the charger being plugged in. I'm planning on sending it back in. Should I swap back my HDD first before doing so? EDIT: I forgot to mention that you're not allowed to change the HDD on the Early 2008 MBP as it voids the warranty.