I tried your suggestion and got the light cyan cartridge to register. I’m still having an issue getting the photo black cartridge to register. I tried a different control chip from a new replacement cartridge and tried a new OEM chip as well but no luck. I have tried using tape over the solder joints. I managed to tweeze out the prongs but they seem to be sticking out shorter than another one I compared with. Maybe a replacement photo black control chip would help as well as any other suggestions.