The first attempt failed but the second 'WARDS' code it used was able to power off my receiver as expected. I then followed the procedure on my TV again for linking my remote, but when asked for the brand just searched 'WARDS'. I used this site ' ' and found that the brand 'WARDS' uses the same IR code as mine (RCA, Optimus, Magnavox, Capetronic, ADC, and Yamaha all seem to have IR codes that may overlap with some of pioneer's too). The issue seems to be with the Pioneer IR code database so just find a receiver, that is NOT pioneer, that uses the same remote IR code as your receiver. Samsung obviously messed something up with their update relating to the pioneer IR code datebase. After the re-format, the volume on the remote never worked again.same errors as mentioned by others. Everything used to work perfectly until I updated to the latest firmware, AND reformatted my TV. The receiver is plugged to my TV through an optical cable.
I have a Samsung 4K Q60R QLED TV and a Pioneer receiver (VSX-515V) that I use as a home theather. (I've posted this elsewhere as well as i came across two posts about this) It IS samsumgs fault, but it CAN be fixed, at least in some cases. I'm happy to shed some light on this issue.