Issue with Laney GH100L

[blackwhaleamp]

Hi,
I just received a Laney GH100L for repair. For some reason, after few minutes the amplifier starts to make a very strong crack noise. Has anyone got same kind of issue as me?
Any suggestion will be very well appreciated
Thanks

[nosaj]

Hi,
I just received a Laney GH100L for repair. For some reason, after few minutes the amplifier starts to make a very strong crack noise. Has anyone got same kind of issue as me?
Any suggestion will be very well appreciated
Thanks

No, but how about setting up some multimeters on the output and preamp voltages to see about narrowing down the area to investigate. After the crack noise what happens?

nosaj

[Mick Bailey]

Narrow down the problem. Pull the PI and see if it still does it.