Inspect the internal power module for bulging capacitors or burnt components. Thermal Fuse Check
Behringer Xenyx QX1202USB Service Manual: Essential Repair and Maintenance Guide behringer xenyx qx1202usb service manual hot
Here is helpful information regarding the service manual, specifically tailored to the lifestyle and entertainment context (home studios, content creation, small gigs, and hobbyist use). Inspect the internal power module for bulging capacitors