Help regarding identification of a DC-DC ic bearing the print "ER=1B 73H" in a faulty BOE-hm185wx1-400 panel

I am having a faulty BOE-hm185wx1-400 panel, where the MLG voltage has dropped to 15 V instead of the usual 25.4 volts. After a bit of diagnosis, it appears that the DC-DC ic below is possibly faulty.

But I am unable make out the ic datasheet or find replacement based on what is written on it ER=1B 73H

• @DKNguyen @SpehroPefhany thanks for your help. Could you please help me a little bit more by helping me gather more information about the ic with ER=1B 73H written on it... So that I can possibly order a replacement... Aug 18, 2021 at 21:19