Answer to: My MacBook won't boot, no start chime, just the DVD spinning sound.I've just experienced the same issue, solid power light, nothing else. It happened after an update, the computer was working perfectly fine before. The first time I held the power button for 10 seconds ( quick power light flashes ) then rebooted ok. Started software update again, same story wouldn't reboot. This time holding the power button for 10 sec when powering on, didn't fix it. I tried holding the eject button and the power button, even if nothing was inserted and it worked! Heard the chimes and it started flashing some internal device ( one of the updates ) and then it restarted ok.