Infineon Technologies, Micron Technology, Samsung, and Winbond Electronics supplied the memory modules, which were also used by other notebook makers, an HP spokesman said. HP used the defective component in 900,000 Compaq and HP notebooks that shipped last year.
Notebooks currently on store shelves or in sales channels are not affected, the spokesman said.
HP hasn't received any complaints, and the chances of customers having a problem are "extremely small," Hockey said. Nevertheless, HP decided to implement a replacement program for the modules to preempt problems.
HP, which discovered the defect during routine notebook testing, said the flaw could result in blue screens, which indicate a computer crash, intermittent lock-ups, or memory corruption.
Notebook customers can use a utility available on HP's Web site to test their machines. If the flaw is discovered, the customers can send an E-mail to HP, which will send a replacement module. The customer will have to swap the old module with the new one.
The HP notebook models affected include the Compaq Evo Notebook N610c, Compaq Evo Notebook N610v, Compaq Evo Notebook N620c, Compaq Evo Notebook N800c, Compaq Evo Notebook N800v, Compaq Evo Notebook N800w, Compaq Evo Notebook N1000c, Compaq Evo Notebook N1000v, Compaq Presario 1500, Compaq Presario 2800, Compaq Presario x1000, Compaq Presario x1200, HP Compaq Business Notebook nx7000, and the HP Pavilion zt3000.