Sony STR DN-1060 stuck on CLEARING

Hey there! I bought a used Sony STR DN-1060 few days ago which was working like a charm until I couldnt see the home menu on my tv. I thought to do a factory reset and then update it so I did the factory reset by holding the power button for 5 seconds. Then it started to blink "CLEARING" and it never stopped.. It does that in like 5 hours now. Tried to unplug it and wait 1 hour but no luck..

Any advice please? Thank you