HI

i did purchase 3 Deco E4 and they went fine for few days, then for the last week the main deco unit is randomly turning Red for few minutes or few hours, then back to blue. Of course no internet coming from the deco network during that time. The main wifi coming from the internet cable box is working fine, but the ethernet seems to be down when I plug a cable straight between the cable box and a PC. Could be an ethernet issue but I do not know if this is caused by the Deco (and impacting the internet box) or just coming from my ISP - not sure how to check and diagnose