My friend's PC recently crashed after a USB Power Surge and refused to boot up after. First it was two beeps. Tried testing RAM sticks one at a time. Tried separate RAM. Same result. Tried the CMOS battery. Started rapidly beeping, but then went back to the 2 beeps. the power supply Unit was swapped out as was the RAM, now it's just a single continuous beep. Motherboard is ASUS Z170-A. Not sure of the rest of the specs but I'll ask about it.