1. Disconnected, reconnected VGA to monitor DOES NOT SOLVED (still continuous beep).
2. Clear CMOS DOES NOT SOLVED (still continuous beep).
3. Tested RAM on another DDR2 board and that RAM is function properly so RAM is in good condition.
4. Just for sake of testing, got myself a PCI Express Graphic card, insert to the board DOES NOT SOLVED (still continuous beep).
I am thinking that it is the motherboard that is broken but it seem to go through the post process (i.e. power go to the HD, HD spinning, ... then the long continuous beep).
Spec said graphic card not properly inserted (even if I am using the onboard graphic card).
The onboard graphic card must be dying (if that is the case, if I inserted a new card into the PCI Express slot, the beep still occurred).
Getting myself a POST Card, hopefully it gives me more info.
Thanks!