have you tried plugging a power cap into a spare slot on the receiver ?
it may be a power hungry receiver
like this one/
https://www.ebay.co.uk/itm/132915229...bf4d2949cde950
or if you all want one 3 is cheaper....ps its not me selling them nor do i know them
https://www.ebay.co.uk/itm/144017865...ed4d1d51f10d17