guys, i upgraded my ps3 from stock 160GB to 500GB since PSN back online. using Seagate Momentus 500GB SATA 5400rpm 2.5". bought from this LYN forum the thing is, this previous 2~3days my PS3 become unstable. when i switched ON the power, it never get to XMB screen. the HDD led lit about 5~10minutes n then gone. try to switch OFF the power button but nothing happen. so, i OFF main supply. it happenned for 2~3 times n finally it can get to XMB screen. but i noticed, the XMB animation is a bit lagging.

I played LA Noire for 3 hours and swith off my PS3. the next day, i turn it ON again but same thing happened. the HDD led is lit on for 5 minutes and then gone, but, it never get to XMB screen. it is like the CPU can't read the HDD. Is anyone facing this problem???