First post so hello to all. 2 weeks ago I installed SP1 on a Macbook 2,1 and since then I'm experiencing random blank screens. Everything else seems to be running fine while the screen is blank. The only way to see windows again is to close the lid into sleep mode then reopen and log in. However sometimes the laptop will not sleep and i need to hard restart. i wont be able to use this fix when i DJ live with the laptop as i'll lose audio when in sleep mode or hard restarting. The actual blank screen does not seem to be connected to any program as i've uninstalled everything new and old to try and figure the cause. The problem happens at random when using or not using the laptop. Has anyone encountered a similar problem?