Happy Holidays!
If you have faulty electronic component, you go to electronics engineer and not to bike mechanic. It is that simple. I can bet the bike shop that will hire at least one electronic engineer will be most popular bike shop for serious cyclists in any given area, and most of these failures are quite basic.
Absolute trash bike, but super interesting to see that you can buy a complete turn key bike in one click with that groupset on. The only good thing on that bike is the groupset.
Upgrade parts to TT on AliExpress :https://a.aliexpress.com/_EI7QWX8
Is it? Rival RD is about $450 aud. Blips are another $100-$150 and TRP brakes are about $350 a side.Never mind, I actually opened my eyes. $300 for the blippy's, $400 for the brakes and another $220 shipping