ASUS Z97-A, boot device led on

Davide_2

Reputable
Feb 7, 2016
1
0
4,510
Hi all,
I watch all of the previous thread about this but still I have not found a solution.
My MoBo is an ASUS Z97-A, and it's new, in sostitution to the previous (I thought it might be the MoBo the problem).
When I booted my PC it was sometimes extremely slow and other times it went with no problems (I have an SSD and normally boot in 7sec). So the problem does not shows every time I boot my PC. Also, if the PC boots normally, then the apps load very slow (iTunes, Bittorrent), also explorer.exe is slow for example when I connect an USB. Not alwasy though, but I think it all might be linked.
Today I replaced my MoBo and notice the boot device led which doesn't turn off. I tried unplug all, turn on, turn down, attach the plugs and turn on again but nothing changed. I have no cables touching the back part of the MoBo. I slightly overclocked, but the problem was previous.
Any idea? I'm really going crazy

EDIT before i was trying to reinstall the OS and put a DVD on the device. The PC like always stopped of the ASUS logo page, then suddendly the DVD player started turning and the boot started. Also, if I go on installing the new OS the procedure is extremely slow.