My PC is dead. 
Probably the hard disk is broken, as it is not anymore rebooting, and is making some “clack clack” mechanical noise.
Tomorrow I will take it to “the doctor” 
I will be OUt for some days.
I’ve lost my HD in the same modality
how many of you have lost HD form this summer?
I lost a couple of HD 2 years ago, pheraps I used a p2p software… No matters in the last year.
Tickings, clickings: two possibles. Hard drive faulty yes but also a switched-mode power supply trying to turn on under fault conditions
A pencil end pressed to the ear and the other end pressed to the hard drive or power supply will help locate the source of the ominous clickings
BIOS (onscreen messages on booting up) should start perhaps if only the hard drive is faulty. No BIOS messages, maybe power supply
Ming
It was the Hard Disk. The “click click” was probably the HD head clicking on the end of the HD.
HD Replaced.
Some time needed now to set guns convergence, refueling, ammo reloading, glicol filling and so on.
I hope to be back on duty in 1-3 days.