Problem with level in one channel on mackie vlz pro 1202

[r4mos]

Hello, like the title says I have a problem with the level on the first channel of my mackie mixer.

It is a mono channel and when I plug an instrument it makes practically no sound, even if the pot is turned on the max level, I Turn the trim pot on maximum level and the sound is preceptible but softer than the other channels, maybe is a problem of the amp section of the channel?

thanks!

 

[soundguruman]

A blown op amp in that channel.

 

[r4mos]

I imagined that, I will try changin the amp

thanks