30 34410A/11A User’s Guide
1 Quick Start
Other Basics of Operation
If the Multimeter Does Not Turn On
Use the following steps to help solve problems you might encounter when 
turning on the multimeter. If you need more help, see the Service Guide 
for instructions on returning the multimeter to Agilent for service.
1 Verify that there is ac power to the multimeter.
First, verify that the multimeter’s Power switch is in the “On” position. 
Also, make sure that the power cord is firmly plugged into the power 
module on the rear panel. You should also make sure that the power 
source you plugged the multimeter into is energized.
2 Verify the power–line voltage setting.
The line voltage is set to the proper value for your country when the 
multimeter is shipped from the factory. Change the voltage setting if it is 
not correct. The settings are: 100, 120, 220, or 240 Vac (for 230 Vac 
operation, use the 220 Vac setting). 
See  “To Replace the Power Line Fuse” on page 31 if you need to change 
the line–voltage setting.
3 Verify that the power–line fuse is good.
The multimeter is shipped from the factory with a power–line fuse 
installed. The supplied fuse is a 250 mAT, 250V, slow–blow, 5x20mm 
fuse,  Agilent part number 2110–0817. If you determine that the fuse is 
faulty, replace it with one of the same size and rating. 
See  “To Replace the Power Line Fuse” on page 31 if you need to replace 
the power–line fuse.
The  current input path is also fused. The supplied fuse is a 3 AT, 250V, 
slow–blow, 5x20mm fuse,  Agilent part number 2110–0780,  and is housed 
in a standard screw–in fuse holder on the left side of the rear panel. If 
you determine that the fuse is faulty, replace it with one of the same size 
and rating.