Hello
I would like to help owners of DMR-ES20 to fix the known "zero" error.
This occur due a failure on PSU section that can't provide correct voltages to other sections/modules.
Is recommended replace 7 electrolytic capacitors (a cap kit) with 105°C range.

C1143 100uF 350V
C1150 56uF 35V
C1280 680uF 10V
C1400 470uf 16V
C1270 1000uf 16V
C1260 1500uF 10V
C1281 47uF 25V