My Acer E1-571 won't startup. When I press the power button the power light comes on but there is no Acer splash screen, HDD light flashes constantly at approximately 2 flashes per second and the fan pulses at the same rate. This started a few weeks ago but at that time it would finally start (after 2 to 12 hours of flashing lights and pulsing fan) and boot into Windows 8.1 then proceed to run perfectly until shutdown. Next time I try to power up it repeats the problem. Lately it will not startup even after 2 days being left on. Is this a failing HDD or motherboard issue, any ideas?