Train encountered power fault at Rear M2car arriving station. Reset, ok. Fault recurred at BDL2. Re set, ok. ~~~~~ #2538 Checked HB/LB-ok. Found charging resistor O/L. Further checks found brake chopper IGBT flashover. Isolated and tagged #2538 PRCB. Checked by Kumar/Jack/Sateesh. 29/04/20. #2538 BCH replaced. Checked VVVF INV1 and INV2, found INV1 low resistance. Checked TM1 & TM2 megger tester, resistance failed. Not: 2155773 raised to RSW for T/M 1 & 2 change out. Not: 2155774 raised to RSW for T/M 3 & 4 change out. Done by Kumar/Jack/Sateesh/Koh. 30/04/20. #2538 after TM1 & 2 C/O, carried out propulsion for no power test-tested ok. Carried out limited movement-ok. No power fault observed during depot shunting. Done by Kumar/Jack/Sateesh/Koh. 05/05/20.