Repair manual

Adjustments Screen Voltage - 18
3. Connect the jumper
adjustment tool (922-
4165) to the video board
pin. Refer to the
“Jumper Adjustment
Tool” procedure
mentioned earlier in this
section.
Note: Without the
jumper installed, cutoff
and white balance
adjustments cannot be
saved. The jumper
enables writing the new
settings to the factory
space.
4. Power on the iMac.