Chapter 3 Power-On Self-Test 3-21
3.5 Bypassing POST
POST can be disabled and thereby bypassed. Tobypass POST:
1. Prior to powering on the system, press and hold the Stop key on the keyboard
(FIGURE3-2).
2. With the Stop key pressed, turn on the system by pressing the power-on key.
TABLE3-2 Keyboard LED Patterns
CapsLock Compose Scroll Lock NumLock Meaning of Pattern
On Off Off Off System motherboard
Off On Off Off CPU module 0
Off On On Off CPU module 1
On Off Off On No memory detected
On On Off Off Memory bank 0
On On Off On Memorybank 1
On On On Off Memorybank 2
On On On On Memory bank3
Off Off Off On NVRAM