In case you are using a Socket, take care how you are mounting the EEPROM. By mistake if you rotate 180 degrees and insert there is a chance of inserting EEPROM GND into hardware board VCC and EEPROM VCC to hardware board GND.
With how many newly purchased EEPROM's have you seen this issue?
Let us know, if you are still having any issues.
Thank You & Regards,