Service manual

Power-Up 2-3
Table 2–1 Control Panel Display
Field Content Display Meaning
➊ CPU number P0–P3 CPU reporting status
➋ Status TEST Tests are executing
FAIL Failure has been detected
MCHK Machine check has occurred
INTR Error interrupt has occurred
➌ Test number
➍ Suspected device CPU0–3 CPU module number
1
MEM0–3 and
L, H, or *
Memory pair number and low
module, high module, or either
2
IOD0 Bridge to PCI bus 0
3
IOD1 Bridge to PCI bus 1
3
IOD2 Bridge to PCI bus 2
4
IOD3 Bridge to PCI bus 3
4
FROM0 Flash ROM
5
COMBO COM controller
5
PCEB PCI-to-EISA bridge
5
ESC EISA system controller
5
NVRAM Nonvolatile RAM
5
TOY Real-time clock
5
I8242 Keyboard and mouse controller
5
The potentiometer, accessible through the access hole just above the Reset button
controls the intensity of the LCD. Use a small Phillips head screwdriver to adjust.
1
CPU module
2
Memory module
3
Bridge module (B3040-AA)
4
Bridge module (B3040-AB)
5
EISA/PCI motherboard