Hacking R4 card help needed! Please?

[Dragowolf33]

So I have a friend who has an R4 card. I asked him to update to v1.4.5 on his DSi XL. The original firmware he had was v1.4.1. The R4 card then stopped working after he updated. I tried on my DSi XL and it worked. (I do have homebrew on it so it would work while my friend doesn't have homebrew.) I really need someone to help with his R4 card since he really wants it working again.

 

[KleinesSinchen]

Updating the DSi firmware is in general not needed and not a good idea because -- it does almost nothing except blocking older flashcarts. See here:
https://dsibrew.org/wiki/System_Menu

The only reason I can think of for updating to the latest firmware is to visit the (defunct) shop in order to unlock the "Data Management" option in the settings menu which does not appear before visiting the shop at least once.

Possible solutions:

1. Install custom firmware on the device with 1.4.5 - this should unblock the older R4
→ This requires Flipnote Studio at or hardmod/soldering at the moment.
→ If the new exploit "Failzone" is released at some point, any DSi will be hackable with software only.
2. If the R4 can be updated to work with DSi System Menu 1.4.5 and 3DS firmware 7.0.0-13 (and later), update the cartridge
→ Refer to the website given on your cart (if still functional)
3. Get the R4i Gold 3DS Plus to replace the old R4.
→In my opinion the best flashcart at the moment.

Ohh. I see: You also made a regular thread with photos. And the cart does not have any label on it (anymore?).
https://gbatemp.net/threads/r4-card-help-needed-please.537391/

This is a little confusing. I will copy this reply to the thread as the ASK! section is more limited.