Hi, numbers are still on the chip, I must be using CSI monitor, zoom in and see.
Will need to wipe a tissue with metholated spirit or isopropanol on it and observe as it dries off, another CSI trick.
But I agree it will probably be a PIC or something like it, programmed, sorry haven't got to CSI bit yet where they decode protected controller code.
Tom...... 
PS I do know how to get finger prints to shown up with superglue.