White screen issue

If you want to use newer firmware than 0.219.24 AND do not use LCD HY28A in SPI mode you must remove R30...R32 on ui- board- otherwise you will get a white screen.

Reason is in newer firmware touchscreen code makes actions on SPI bus for identifying eventually activated touchscreen. This causes a bus error because R30...R32 short-circuit parallel and SPI bus.

In former versions of firmware the short-circuit doesn't matter because of never actions took place on SPI bus.