Harmon Kardon AVR 7300 Standby Light won't come on however the unstitched plug at back of unit has power. How do I get the Standby Light to come on? How many and where are the fuses I need to check?

Question edited for clarity.
Question moved to Harmon Kardon AVR category.

They all need remotes. You just buy a replacement.

https://www.google.com/search?q=harman+kardon+avr+7200+remote+replacement

..

Hi, Try this. Hope this helps and I have the link here to the manual.
Processor Reset
If the AVr behaves erratically after a power surge, first turn off the front-panel
main
power switch and unplug the Ac power cord for at least 3 minutes. plug the cord back
in and turn the AVr on. If this procedure doesn't help, reset the AVr's processor as
described below.
note: resetting the processor will erase all user configurations, including speaker and
level settings, and tuner presets. After a reset, reenter all of these settings from your
notes in the Appendix worksheets.

To reset the AVR's processor:
1. press the front-panel Standby/on switch to place the unit in the Standby mode (the
Standby Indicator led will turn amber).
2. press and hold the front-panel Standby and memory/folder buttons until the reSet
message appears on the front-panel message display.
3. press the memory/folder button again to reset the AVr's processor.
If the AVr does not function correctly after a processor reset, contact an authorized
harman
kardon service center for assistance.
to locate an authorized service center,
visit our web site at www.harmankardon.com.

https://www.harmanaudio.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw409ee4c9/pdfs/AVR700NEW_OM_EN.pdf

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/laura_08254539050d64db

Possible blown fuse inside unit, unplug and remove the top cover
fuse should be near the power board and transformer. replace with exact fuse, "Never remove covers with the unit plugged in" Always wait 4 or 5 minutes after unplugging to remove the cover.Replace cover before plugging unit back in.

Download a manual from the harmon Kardon site.

Probably was damage buy a power surge, Internal damage to (Reciever)

microcontroller needs to be changed

I also had this UNLOCK message on my Harman Cardon AVR 130.
The reason for this error was - in a hurry I've plugged the optical input into optical OUT! Double check that your connections in the back are correct and hopefully it fixes your problem.

Cheers,
Sergey

Make sure it is not in download mode!! a little switch on the back of the device