Wa Alaikum Assalam,
Thank you for sharing the details. From your description, it seems like your Honda City’s multimedia/digi panel is not receiving power. Since the reset and power button methods have not worked, the issue could be due to:
Loose wiring or blown fuse behind the panel
Faulty multimedia unit that needs repair or replacement
Touch panel defect (if it has never worked since day one, it may be a non-functional or replaced unit)
We recommend getting the wiring and fuses checked first by a reliable electrician. If those are fine, then the multimedia unit itself may need professional repair or replacement.