hey i have an HCD-551 it turns on and has power to everything as far as i know but there is no sound. It makes a short sound like its about to play when it is turned on but then there is no sound. The sub is recieving input because the power meter on the sub moves up and down with the sound. any help would be appreciated. email me @ snappa_dude@hotmail.com if you can

im a retired sony tech. worked on tons of these. look for the rear amp IC to be shorted. was a common problem. the unit is probably in the protect mode. how can you tell??? at power on you hear 1 click. ac line relay. this is followed by a 2nd click. speaker protect relay. if you hear a 2nd then 3rd click, its going into protect. if you dont hear the 2nd click check for DC voltage on speaker protect relay coil. you will need service manual and test equipment. luck

Hi Deepak, If your system #HCD-551 is down and you want to sell your system control cable part #176512111 let me know. Many Thanks

I am in need of the system control cable if someone has one please email me @ kc8raf@hotmail.com looking forward to hearing from someone. thanks Jim

I need to get the schematics for this stereo system Sony HCD551 or a diagram to show us how to hook it up properly. Thank you Weezy9117

did you find a source for that cable? id buy two if i could

Did you ever get your problem with the no sound to the speakers resolved. I am having the same problem with the same exact unit.