Yamaha solid state, proper grounding questions

[niko084]

I have done a fair amount of searching and I seem unable to find the information I am looking for and need some direction.

My knowledge is enough to know I need to make some changes but not sure the best ways to do so.

Currently I have a Yamaha M60, MX35 and C60, all of which have the old style 2 pin power plugs and the cables are getting old and kinda chewed up. I want to replace them and being they are not mounted in a rack and I have no intention of putting them in a rack, the old chassis ground point wont be used that way.

So the way I see it and am thinking about it here is I can replace the power cords with 3 pin cords that have earth ground and attach the earth ground to the chassis. Would this be correct?

I'm not having any noise issues but do want to replace the cords and get a good ground on them.

Anything else I can do while I'm going that?
I have already took a good look over the capacitors all these components have very little use on them.

[richie00boy]

If the units have 2 pin cords already you are best replacing like for like, adding a safety earth may result in you getting ground loops.

[nightanole]

Id check to see how the chassis is connected to the amp. If the inputs are grounded to the chassis and stuff, you might want to change that. If the chassis is not connected to the amp at all, you might want to run a ground loop isolator from the chassis ground to the amp ground.

So 3 prong her, isolate inputs from chassis ground, and run a ground loop isolator from chassis ground to amp ground.