Sometimes,your rotomolded ice hard cooler box latch will be broken,you need to repair it.
Thanks YETI cooler have one video to teach you how to replace the latchs.
All hard coolers can change latches like this way, please see the below video.
You can also replace your rotomolding cooler box hinge pins like this way,
For Boright Rotomolded coolers, you can also change the lid latch with the above way,
For Boright Latch base, you can use screwdriver to replace. It's very easy.