Sony DAV-C900 Home Theater System: problems with speakers and dvd picture quality
Hello all, I hope someone can help me here...
The speakers have been going off and on intermittently for a while now. I have cleaned the connections, but it does no good. Sony has these stupid color coded connectors and I do not know how to go about upgrading the wires. If that is even the problem. I have switched the wires around, and when I switch one that works to a non-working connector it will not work. When I put a non-working speaker wire into one of the working connectors, it will work--it almost seems to me that it is either a problem internally, or with that specific connector that sticks out of the rear of the unit. After fooling around with them for a while, I can usually get it to work, but then it will go out for no apparent reason. Another problem has to do with the picture. It has developed these squiggly lines while watching dvd's. Sometimes they go away after a while, but it is certainly annoying. I have attempted to clean the laser with one of those dvd cleaning disc's and even replaced the s-video cable, but neither has resolved this problem. It used to have an excellent picture, even though I wasn't using component cables. Due to my TV set-up, I need to use the S-video hook-up, but like I said it has always worked well until recently... We really do not watch that many movies, so I wouldn't think the laser is going bad--hell, the kids have many more hours on their xbox than this unit has...If I had the money, I would just go out buy a new system--not an HTIB this time, but this year has not been too lucrative, so I am stuck with this for the time. Any help will be greatly appreciated. Thanks
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Hello there.... Check your speaker wires and then if that doesn't do it? try replacing the fuses on the back of the amp.. make sure power is turned off and unplugged. If that doesn't work? Try one speaker at a time ... something is causing the system to short out. Hopefully it is not internally
If the noise isn't coming from a speaker, you could need to replace the fan on your computer. The bearings for it might be busted, another issue could be the speaker wire isn't fully connected internally, which you could fix by popping off the top power panel area and fastening the speaker wire in it.
I hope this helps, if not I apologize. The question isn't super vague, but it still has holes in it. :) I can to help more if you post more about the issue.
It sounds like you have bad solder connections on the audio output ic's junction points, it's also possible the internal ic,s might be breaking connection which would explain the intermittent operation of the receiver. But to be on the safe side check your speaker and wiring connections very carefully on the back of your receiver. If that does not do it you will need a technician to carefully go through your system and make any necessary repairs.
Hello a simple thing to do is clean the speakers and mic on the phone. Use a toothbrush it helps to get the dirt stuck in the mic out. If people are still unable to help you after cleaning the phone then the speaker is blow. You need to get it replace hope i help a little.
Check your PC's volume. You may or someone in your household has accidentally muted it. Unmute it or increase its volume (if you can't find the audio icon in the taskbar, proceed to the control panel - it's there), it maybe too low.
Hope this helps...
Check the incorporated capacitors (if any), also inspect the braid speaker wire on the bass speakers (i understand that these are cutting out).
The braid wires are located between the speaker connection terminal and the speaker cone - if these are damaged or broken, this can cause the speaker to cut out intermittently. To see if this is the case, try to push the speaker membrane gently inward when the speaker cuts out - if it momentarily regains function, then the braid is almost certainly damaged.
Braid wires can be resoldered, but it's not a very easy task because of the structure of the braid, which makes it difficult to clean and solder.
You should have it repaired by someone with good soldering skills or at a speaker repair shop, otherwise the alternative is to replace the speaker.
If it's not the head unit, and it's not the speaker, then it must be a problem with the wire going to the speaker. When you hit a bump, the wire shorts or opens intermittently causing the faulty sound. Some insulation could have rubbed off. There could be a bad pin in a connector. The wire could have some broken strands. It could have become pinched against something sharp.
The good news is, it's really an easy fix. Just have your installer make sure that the sound is OK at the wiring harness itself, and run a new wire from there to the speaker.
It sounds to me like there is a dirty connection or a failing component in your stereo. Being intermittent like you've described, is hard problem to figure out. It could be just the connection you are getting at the speaker terminal. But, If you aren't shy about opening up your stereo to see the guts, try getting some denaturated alcohol and clean the connectors inside. Then if you are familiar with soldering you could check the connections in the driver circuts and see if you can re-flow some of the connections. I had that problem with my receiver. The video output was be flaky so I flowed some new solder on some terminals and it works perfectly. I hope things work out. -Andrew Hawkins
First things first
1) check cable for bad connectivity or dust. clean .
2) your board or volume control may be damage, or dust inside clean carefully ( if you can) with air spray for computers.
3) I hate to tell, .....change your speakers, may be is bad IC on board for speakers.