Open the back and reseat the memory chips. If the memory chip in slot 1 has a poor connection, or is defective, your laptop won't start. You could try swapping the memory chips to get a new chip in slot 1. You might also reseat the HDD(s) while you're in there
If that fails, you could test if your power adapter is putting out 19.5 volts /150 amps or try another power adapter of similar or greater capacity.
You may need to return the laptop to the retailer for exchange (if new), or set up an RMA for Warranty repair with ASUS.
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT