indicated in diagram below
Step 6 : Supply +5V from external power source to pin 10 terminal of connector (CP801) on
main board.
12.5. Checking for Main P.C.B.
* Repeat Step 1 to 4 of item 12.1
* Repeat Step 1 to 7 of item 12.2
* Repeat Step 1 to 4 of item 12.3
Step 1 : Remove connectors (CP705, CN503 and CN501).