V10 SP6, Yealink T38G Firmware 18.104.22.168. Set up BLF for extensions. Reprovision phone. Still no lights at all. Have checked in the T38 Web management and see the settings have been correctly set up as follows: DSS Key->Memory Key-> DSS Key1, BLF, 102, Line 1, *20*102 Buttons do however function to dial/pickup call as expected. Just NO LIGHTS! Other T28 configured for BLF in same manner work perfectly. Any ideas appreciated.