HT-4600/PB-4600 series Technical Manual 61
REPLACE MAINBOARD
After removal of LPC adaptor card, PCI riser card, PCI I/O plate, DDR2 SDRAM,
system exhaust fan and all type of connections from the main board and please use
appropriate tool to release the power switch knob and power switch post (marked in
following picture) from the power switch on main board through the gap between
power supply and the front metal wall of chassis. Then please remove 4 screws on
main board as red-circled in the below pictures to replace the main board with the
system I/O plate.