Have you tried pressing the "TNR" button? The TNR button switches the remote to control the 990. I sometimes forget to press TNR and wonder why the 990 is just sitting there!
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AvFan
Outlaw 976 | ATI 2005 | M&K 850s Left, Center & Right, Surround-55s, MX-70B Sub | Harmony 950 remote | Panamax 5100 | OPPO UDP-203 | LG OLED55B7