Kenwood KAC-749S My amp worked so i decided to take off the top and take out the computer board. In the process I put in 2 small neon lights to light the top of the amp. After assembleing the amp back together the amp will not activate. I get power to the ground, power and battery outputs and the amp will still not run and prouduce sound through my subs. I dont know if somthing got loose or fried during the installation of the lights but I cant get it to power my subs. Thanks, Rick

internally the amp is shorting out. return & replace amp if you got warranty on it.

yes you have a internal fault of the amp. the circuit that puts it into safe mode is bad and that is a very small chip on the board know as a op amp. needs to be repaired.

http://www.retrevo.com/support/Kenwood-KAC-622-Amps-manual/id/479bh233/t/2/

I had a kenwood amp that did almost the same thing. Try checking you zener diodes. I found 2 bad ones and replaced them and amp works fine ever since. If your not to good at diagnosing, I have my own business installing car audio/video products as well as amp repairs. I gaet amps from all ove the place. If interested send me a message, I'll be glad to help. One more thing, I'm the cheapest person in amp repair. Good luck

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/mark_b53a7494531bf96d

HI DUDE EVERY REMOTE WIRE THEY HAVE FUSE NEAR THE BACK OF PLAYER TRY TO CHANGE IT .... R...TRY UNPLUG UR AMP .. AND ..FIX IT BACK

one side is bad

a red light indicates you got no power check your wiring you may not have a good ground, you need the green light to come on

First, try looking here: http://www.crutchfield.com/learningcenter/car/amplifiers_movie.html If that helps, be sure to leave feedback or I don't get paid. Look all over the cruchfield page and you can find guides for every type of installation.

Assuming that the four speakers are connected to the amplifier, then the amp is the most likely problem component. Does the amplifier show a power light when the system is turned on? Note that there is probably another fuse in the amplifier power wire, near the battery.

hi your assumption is wrong the light blinks for meny diffrent reasons: 1) power is too low - check the battery of the car 2) connections are wrong 3) the AMP is in safe mode here is the manual of the product: http://kenwood.nl.nt.ims.hr/languages/EN/support/manuals/KAC-849~749S%20(EN).pdf here is the home page: http://www.kenwoodeurope.com/support/Menu2.aspx?men=2&M1=3 good luck