DMC reset
DMC #1 SPLY 49VU 'E11'
SWTG 49VU-E9
DMC#2 SPLY 121VU 'Q8'
SWTG 121VU-R8
DMC#3 SPLY 121VU 'Q9'
SWTG 49VU E7
STNBY SPLY 49VU 'E10'
So maybe try pulling the cb's E11, Q8, Q9 & E10 and if they will not swich then pull E9, R8 & E7.
The red diagonal line will indicate a failure, hence you should switch to DMC 3 and pray.
Hope this helps.