Troubleshooting
Beforecontacting theHumminbird® CustomerResource Center,please read the
followingsection.Takingthe timeto review these troubleshootingguidelinesmay
allowyou to solve a performanceproblem yourself,and thereforeavoid sending
yourunit back for repair.
NOTE:Donot attempt to repairthe HDR 650 yourself,as there areno user-serviceable
partsinside, and specialtools and techniquesare required for reassemblyin order to
maintainthewaterproof integrityof the housing.Repairs should be performedonly by
authorizedHumminbird®technicians.

HDR 650 Doesn't PowerUp

If yourHDR 650 doesn't power up, refer to the Installation section, and make
surethat:
• the power cableis properly connectedto the HDR 650;
• the power cableis wired correctly,with red to positivebattery terminal and
blackto negative terminalor ground;
• the fuse is operational;a fuse can often appearto be good when in fact it
isnot; check the fuse witha tester or replace itwith a known good fuse;
• if the unit is wiredthrough a fuse panel, make sure that the panelis
powered, as accessoryfuse panels are often controlled by a separate
switch,or even theignition switch of theboat;
• the battery voltageof the power connectoris between 10 and 20 VDC.
Correct any knownproblems, including removing corrosionfrom the battery
terminalsor wiring,or actually replacingthe battery if necessary.
37 Troubleshooting