Help needed please!

[SadChief]

So all of a sudden, I simultaneously lost today:
-front USB functionality, completely (can't see any USB volume; no working mouse or keyboard either)
-rear USB functionality, partially (can't see any USB volume, but keyboard/mouse work)
-bluetooth: not available. I used to use my trackpad, luckily I could find an old mouse to work with;
-and above all, no starting volume choice possible with ALT key. No EFI boot accordingly. Keeps restarting on my Master volume: no volume to choose to start from.

I have the Inateck KT4004 USB3 card installed which works very well, this is a good point. I could also find a Bluetooth dongle. But what bothers me, it's that I can't choose my starting volume (which behaves normally in Disk Utility). Tried another keyboard: same thing.

Any idea on how to deal with is very welcome. Thanks in advance.

My machine: see signature.

 

[maflynn]

Could it be the logic board failing?

 

[s-hatland]

i had a similar issue when none of my USB ports were working (except keyboard and mouse) and as often as an SMC reset doesn't help, it solved my problem. May give it a try. The no boot screen issue makes it seem software related and wasn't happening for me.

 

[SadChief]

i had a similar issue when none of my USB ports were working (except keyboard and mouse) and as often as an SMC reset doesn't help, it solved my problem. May give it a try. The no boot screen issue makes it seem software related and wasn't happening for me.

Thank you s-hatland once, twice, thrice ... thanks a million!!!
Everything, boot screen included, came back to normal

Thank you maflynn for taking from your time and trying to help To tell the truth, your idea was also mine in the very beginning, but I didn't feel very happy to talk about

So, many thanks to both of you

Problem solved

 

[s-hatland]

youre most welcome, glad it was that simple!