What LS00 is a TI 89D3EEK?
LS00 is the SOIC package variant of TI's SN7400D, in other words, a 7400 chip.

See the TI datasheet here, page 2.

It's just a set of NAND gates. The 89D3EEKG4 is really probably just a production counter/ID thing and has no functional significance, at all.

Hence, test the NAND gates inside. If the IC is broken, get the identical TI chip again, or just susbtitute with any 7400 that has compatible voltage levels.