mother board or other components ?

[chrichri3755]

my acer aspire 5336 dosen't wont to switch on the blue led power switch light is lighted the fan works it's all sreen black,hdd dosen't work can you help me?

 

[Xttony]

If the hdd doesn't work then just use another hdd. Faulty hdd sometimes won't let the system boot at all, so first remove your current hdd and stat the system, if a message like "boot manager missing" or "bootmgr missing" appears then there is no problem with other components.