Very weird artifacts on screen and no audio [pics inside]

[Codalunga]

Hey there everyone, I'm experiencing some problems every time I turn on my Recalbox machine (latest stable version on a Rpi3): after 5 or 10 minutes of playing, the screen goes suddenly black with no audio. Worst case scenario - something that happens most of the time - everything stays like that and I have to turn off the console. If I'm lucky, the audio is still missing but the screen turns back on, albeit with weird artifacts as shown in the pics. Now, if I reboot the console, I experience the same problem, but this time right during the boot sequence, as you can see.
I'm not sure this is a Recalbox related issue, or if it's my Rpi dying, my SD Card corrupting, my HDMI cable having some issue or my monitor going berserk. Any idea what's going on?
By the way, no overclocking, and I play games through a usb key.
Thank you guys for your help!

[paradadf]

@codalunga why don’t you try freeing some space. 100% disc isage doesn’t look right!

[Codalunga]

@paradadf said in Very weird artifacts on screen and no audio [pics inside]:

@codalunga why don’t you try freeing some space. 100% disc isage doesn’t look right!

Hey man, thanks for replying!
Tried that, I've removed all my 46 psx games, but the problem persists even with a lot of free space available!

[Substring]

Give a try to raspbian with a different sd card, a different hdmi cable and a different display. If the problem is still here, consider buying a new pi

[RustyMG]

That disk usage looks seriously suspect - due to the way files are stored I didnt think it was possible to get to 100% usage.....

You have to go back to basics.
Fresh install again - is it fine?
If not, try any old microSD just to get up and running - still not fine?
Id then think it was the PI.......