power on self test (POST) config option in kernel config

Hi, One of my devices runs with Centos 5.3 kernel (kernel-2.6.18-128.el5) and that box stops responding occasionally. When did hard reboot, it comes to normal execution. I would like to see which device failure caused the box to stop rebooting. I would like to see the POST process execution (if enabled) during the centos kernel boot time. Is there any kernel config for POST? Any suggestions are appreciated. Thanks, -- -- Krishna Mohan B