Can't close the back cover

Hi I have lg g2 d802 I have replaced my screen now and when I tried to close the back cover it wont close, can manage to close only one side not both.. ill upload a pic later, any ideas? (I've tried many times to close it)

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Ideas? Yes.

Without more information or pics, the first thing I would assume is that any clips holding the cover down were damaged/bent during removal. After that I would look to make sure everything is seated flush within the frame of the phone, ensuring that and any loose screws or debris did not sneak in.

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yeah I thought that it might be the clips but I can clip them in each side separately, I don't know about damage because I've bought 2 screens with frame and in both phone i've used with them there is the same problem of closing the back, is it helping somehow?

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