e100-0001 Canon imageClass D530 help

[khainguyen97]

I opened the toner cover, I saw a pin in the small back plastic piece, Then I pressed it and it poped inside. Now everytime I turn the printer on, it show an error code "e100-0001"

This is where the pin located:

[khainguyen97]

Please help me or tell me how to open it up for repair.