Default The trouble with LED flash

Just bought a 2nd hand G2. Everything seems perfect except when taking photos in low-light situation. I own a G Pro before. With G Pro, the led flash illuminates to assist the focusing. Then will flash again when you take a shot.
But it's different with G2. It doesn't illuminate to give light upon focusing??? Is this how the Camera of G2 behaves? I've even had the flash forced, but it still doesnt lights up when cam is focusing.
Want to hear from you guys. Thanks