Popping Sound on Carvin BX500

Have you cleaned the ribbon cable connector with deoxit?

 

http://www.amazon.com/Stabilant-5ml-Kit-Makes-30ml/dp/B001E50GQS

Works a treat on dodgy ribbon cables and other connectors... get some 99% alcohol to mix it up. Kinda of expensive but its probably a lifetime supply for most folks.

 

Contact Carvin, at least one model has a component change for this issue.

 

There are little tabs on both sides of the plastic connectors that hold them in place. Use something like a tiny screwdriver to push the tabs out of the way while you pull the ribbon out.

EDIT: I don't own a BX500, but this is how all ribbon connectors on my amps and PA heads work.

 

Yes please take more detailed pics because I have a BX1200 that I want to clean up, even though I've had no issues in 3 years. I love my amp!

 

I would do that first. Can't hurt to talk to a tech and while you're at it, ask him about cleaning the connectors.

 

No tabs. No screw driver needed. Just pull the cable while gently wiggling it.

 

Yeah that's right. Wiggle it, just a little bit..

 

Mine recently started the same thing. I called Carvin and there is a known issue with a resistor that needs replacing. Call Carvin.

 

Maybe the OP will listen better to you than they did me? Of course the cover is already off now?

 

Do you happen to know if the bad resistor was used on the most recent version of circuit boards(Revision G)? Thank, Gerry

 

Trust me the cables all come out with no tabs to contend with. I wish I was there to help man. Don't be afraid to pull a bit on the cable and wiggle from the long edges.
As others have stated above, There may be other resistor related problems etc. I can see the words REV. G on the board in your pictures. I believe the Rev. G is the most recent release of PC boards. It may or may not have the upgraded Resistors on it mentioned in above posts. A call to Carvin wouldn't hurt just to clear up some issues.

 

I had a similar problem with my BX500. This, and it would not always turn on without some coaxing (tapping on the chassis). I pulled the ribbon cables and cleaned them with Deoxit - same problem. I was not playing at the time, and became involved in other things, and let my warranty expire (entirely my fault). A word of advice - look at their web site and get informed on their service policy They charge a minimum service fee, which for the BX500 is $225 ! But, they also offer a trade-in or trade-up allowance. I paid the difference and got a BX1500. Now I have a amp that works perfectly, and will cover any of my future needs. I did love my BX500 - when it worked ! So far, so good on the BX1500 !

 

Yes, revision G on mine.