New Mark V relay crackling at power-on?

[funnest]

Recently became the proud owner of a brand-spanking new Mark V combo.

When I turn on the power, but while still on standby, I hear a crackling sound coming from the amp. It is coming from somewhere near the top-left of the amp (not thru the speaker) & sounds to me like a relay switch rapidly flipping on & off irregularly. While this is happening all three channel indicators are illuminated on the foot switch. Once I select any channel, the crackling sound stops.

Seem familiar to anyone? Normal part of the amp warming up or should I be calling service?

 

[Mrjason]

I would bet its your foot switch cable not seated firmly. Common thang

 

[jmontgomery]

Yep. I've taken to looping my foot switch cable thru the amp handle and making sure both ends are firmly attached and I haven't had the clicking since the first week I've had mine.

 

[funnest]

Definitely seems to be the cable (or foot switch). As a test I powered up the amp with the foot switch unplugged, no clicking. Reseated the connectors, plugged it back in, "less" clicking than before. Will go from there. Thanks guys.