Buzz sound in Edifier C2

[arunlouie]

Recently my Edifier C2 (2.1 speakers) stopped working and giving a continuous hum sound. This stopped once and worked fine for a day it started again and still there. All this started when there was power fluctuations (though this is connected to a stabilizer which has LED tv connected). Volume was within 50%

I opened to see if anything burned out, all seems OK, just there is come kind of brown glue like dried liquid between power capacitors, though the capacitors look fine from top.

I really liked the sound of this system, I want to fix this. Now question is how to check which part has gone kaput.

More details:
- It can power up and can show the volume display.
- Volume adjust work (buzz sound goes high and low).
- Buzz sound is there even there is no input fed.

 

[koushik]

Just do these, record the buzz sound and take a few pics of the above mentioned capacitor and share the audio and pic files with us. Let's see if we can make anything from those.

Also just the reverse the AC plug polarity and try once, just in case.

 

[arunlouie]

check your power supply capacitor
if it occurs do take the transformer center tap and connect to the chassis of the amplifier section..

Can you explain in detail. I am totally a novice.

I will upload pics soon.

 

[Jamesp]

Had the same problem.
Had it fixed, replaced the preamp and amp.
System worked fine over night but by morning problem came back.
Am thinking of using a UPS to clean and noise in the AC once it's fixed again.