I've been using my G53SX for about 1 month now... and I have been facing weird / random system hang with the laptop. Have any of you guys faced this?

It is totally random, can be during gaming, browsing, or simply leaving the laptop on. When it happens the HDD LED is solid / permanently on and I need to do hard reset.

I've googled and tried various fixes, including uninstalling Windows SP1, and I've also uninstalled the ASUS hybrid power thing and have the system defaulting to High Performance. I've tried chkdsk, HDtune pro and don't have any bad sectors or problems with the HDD.

What could be the other things I could try?

No BSOD. Very weird thing is for eg I'm playing a game, it would seem like someone rewind the game 3-5 seconds and loop it from then on. All sounds / dialogues keep repeating for about 3-5 seconds, can move mouse, no BSOD, before it totally hangs as I attempt to bring up the task manager or Alt Tab.

I have added in an additional 4GB RAM (guy at the shop installed for me) - should I try removing that and see? Although the G53 is a bit of a pain to dismantle..

Haven't tried clean format - as I've set up my PC nicely :'( before all this happen... want to go for it as a last resort.

I have my RAM in the keyboard slot (easiest slot). I'll try and swap the slots to see it it helps.

mine blinks every 0.5 seconds, no activity. stops for a while, then starts again