MY SOUROUND SYSTEM IS WORKING AND AND THE SPEAKERS ARE WORKING FINE. THE SPEAKERS FEED OUT OF THE WOOFER BOX. THE LED ON THE WOOFER BOX IS LIT. THERE IS NO BASS REGARDLESS WHAT VOLUME ITS ON. ALL INTERNAL FUSES ARE GOOD AND NO SIGN OF DAMAGE TO TO ANY INTERNAL OR EXTERNAL PARTS, PLEASE ASVISE. THANK YOU MY SOUROUND SYSTEM IS WORKING AND AND THE SPEAKERS ARE WORKING FINE. THE SPEAKERS FEED OUT OF THE WOOFER BOX. THE LED ON THE WOOFER BOX IS LIT. THERE IS NO BASS REGARDLESS WHAT VOLUME ITS ON. ALL INTERNAL FUSES ARE GOOD AND NO SIGN OF DAMAGE TO TO ANY INTERNAL OR EXTERNAL PARTS, I CHECKED THE FUSES AND ALL 3 OF THEM ARE FINE, WHAT CAN BE DONE TO FIX THIS PRLOBLEM. MY BROTHER HAS THE SAME EXACT PROBLEM
Loose or cold solder in the circuit board and cleaning problem this is the main caused of no Bass..Cold solder issues - each component is soldered into small holes on the printed circuit board which in turn connects said component to the other components. Due to time, heat, use, some solder joints would be cracked or loose. It is possible that the cold solder is still minimally connected (hanging by a thread). When the receiver turns on heat would be generated which would be sufficient to further loosen up the solder joint to the point it no longer provides electrical contact. Jarring the unit creates movement inside enough to re establish the contact, sometime good enough sometimes not enough.
Again, since the unit still operates (sometimes) then it is highly probable that there are no defective components. As you have surmised, it is possibly a loose connection, solder joints are "connections" except that molten soldering lead is used to attach/connect the component to the board, "loose connection" in this sense is equal to "cold solder".
Again on the assumption of no defective parts, then seeking a more experienced buddy for the soldering might be to your advantage. This is of course in addition to the possible electrical hazards when repairing....
Good luck:
Regards,
VOTIT
If the surround sound system your brother has is the same one you have, and your both having the same problem. then it would have to be a poor manufatured product. however. thier may be a onboard equilizer. you may check the user manual for information on settings. the speakers themself may not carry the bass as the woofer box probebly does.
Mosfet's might have shorted and blew up a capacitor and might have took some surface mount parts with it.it will be in the middle board with the metal shroud (shield). try to replace it .
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