u/Melodic_Patient_7803

I purchased a used EH Holy Grail Reverb pedal. It has issues and that's why I got it cheap.

I replaced the faulty voltage regulator, now it is putting out the proper 5 volts. The LED lights up when engaged. And it passes the signal fine when in bypass. When engaged, the sound I get is a fairly loud buzz that is not affected by the potentiometer or reverb selector switch.

Anybody have any experience with this pedal or these issues. Hoping for some advice or help to get it working properly. Thanks in advance.