INTERMITTENT HANGS - SERVER PC720(8642)

SUBJECT: INTERMITTENT HANGS - SERVER PC720(8642)

SYMPTOM:
Intermittent hangs / traps on Server 720 / 8642

PROBLEM ISOLATION AIDS:
Check settings of jumper J24 on system and manufacturing part number of PCI bridge card

FIX:
Bridge card 07H1107 (fru Part Number 71G0694) requires J24 on the system board to be open circuit

Bridge card 75H7667 (fru Part Number 71G0694) requires J24 pins 1+2 to be Short circuit
( ie. the 2 pins of J24 nearest the back of the machine.)

REASON :
J24 pins 1+2 S/C sets the PCI bus speed to 33MHz. ( new Bridge card )
J24 pins o/c sets the PCI bus speed to 25MHz. ( old Bridge card )