No power to screen on my fish finder. have power to the plug but no signs of life on the screen. whats the problem?

From your crank battery...

bad power cord conection or bad plug in.try in differant plug in

its history buddy screens out time for a new one

Had a problem with my Humminbird. Took connectors out of cradle and ran direct into unit to check cradle, no difference.
Check your getting 12 volts of power to cradle. Did all this and ended up taking finder into a shop and plugging into their set up demo model and still nothing. Unit is stuffed, I'll replace it with similar brand to utilize cradle, wiring and sending unit

Check to make sure the transducer is hooked up correctly, and check the actual transducer for signs of damage. Transducers are fragile, and a good whack can break the crystal inside. For more troubleshooting, here is a helpful link with the Owners Manual for your Humminbird.
http://store.humminbird.com/media/document/PiranhaMAX_150-160-170-180-190c.pdf

I NEED A TRANSDUCER FOR AN EAGLE-168.
SOMEONE CONTACT ME. PLEASE..............

[email protected]

Go to http://www.retrevo.com/search/v2/jsp/mytrevo/myTrevo.jsp?page=man
Fill in the numbers in the box number 2 below where it says to enter your email address. (There's no need to enter your email address)
Click "Download Now"

Well, if it is still working ok now with the partially melted plug, then the transducer itself sounds like it is fine... Attach a new plug and it should all work the same (just with a nice new plug).

Also make sure your power supply to the Fish Finder is properly fused.

fish finder transducer needs to be on before you boot your system. check your hsb cables and termination

I don't think your old fish finder is the LMS-332C GPS Receiver listed above in the description. You don't need the speed wheel for the fish finder to function just the transducer and transducer mount. You should mount that on the back of the boat towards the center but not too close to the motor and not too close to the side of the board. Don't let it hand below the level of the boat. That should keep it from getting hit by the trailer or dragging on the bottom. Try to make it as level as possible. The green and white wires may be for the speed wheel but i'd need a model number for clarification. Hope this helps.