For the past few months, our Denon AVC-X3700H has been randomly restarting. It could be once a week or twice an hour. It shares a powerboard with other devices (eg TV, PS5, XSX etc) but only this Denon unit is problematic. This unit has been purchased about 30 months ago so no longer under manufacturer's 2-year warranty. Using a random Google query, a possible solution could be adding a cooling fan. So I purchased an AC Infinity Aircom S6 cooling fan system. This system's height is only 1.5 inches so perfect for our 2.5 inches top clearance. It blows out hot air at the rear. Note that Denon recommends a 6-inch top clearance for proper ventilation. Anyway, setup was quick and I set it at Smart Mode. Hopefully, no more random restarts from now on. Aircom S6 and its wall power adapter (plug is not AU-compatible) Front & Bottom View Rear & Bottom View Smart Mode detected a temperature (above A/V receiver) requiring 50% fan speed Aircom S6 intake fans right on top of A/V