I have an intermittently failing 4 button Multi-Function Display on my Prius 2009 - with 9 speaker/Bluetooth option part (86110 47210). Some posts on this forum and some sellers on eBay indicate that the 86110 47230 part may be substituted if you don't care about Bluetooth. 1. Is this safe? Can damage occur to the boards? 2. Will the stereo still work? If not, is the power supply board on the 47230 part swappable with the power supply board on the 47210 part? I think the caps are failing.