Peavey CX4080HZ blown channel repair

[g1]

C'mon, not fair to bash x-pro for his post.
Was just expressing his personal frustration. I can understand that and have some sympathy.
He was the only one giving valuable advice here and I'm sure it would have led to success

I hope you don't think I was bashing his post. I completely understand and share the frustration. But I have been directed to 'shotgun' by manufacturers for several products over the years (like Peavey directed for this item). Their reasoning is usually 'time is money' and you are saving the customer from extra cost, as labour is usually much more than the parts. But also, sometimes many peripheral parts are stressed though they are not testing bad. So they replace all the associated parts to avoid another failure.
The one that stuck in my memory was the Panasonic DAT that I was given factory training for. They were prone to the mechanism whining when moving the tape at high speed. I wanted to find out which gear was responsible. The company insisted all the dozen or so gears in the mech. had to be replaced. It took me a long time to accept their philosophy.

[The Dude]

All true, but a difficult concept for many techs- especially those of us who like problem solving as opposed to just making things work. For example: When I was younger, I would often spend hours with a magnifying glass looking for an intermittent connection. Some are obvious and easy to spot- some are not. I one day realized that, in the time I spent looking for that one illusive cold solder joint, I could have resoldered the entire board a couple of times. So now, if I can't spot the bad joint quickly, I'll just resolder the whole area or board (depending on size) and be done with it. Would I like to know which joint was causing the problem? Sure, but I can't afford to hold up other repairs just because I'm stubborn.

[x-pro]

With this approach, you do not know 100% the location of the defective area.
Over time, the problem may appear again. It’s good if the problematic element turns out to be an active element, and if it turns out to be a passive one. Should we change them too?
Then it’s easier to buy a new device.
After almost every repair, the client asks me: what was there?
And tell him: I don’t know, I just changed all the parts and it worked.
He won't come to me anymore. And not only him..

Yes, I understand that the author of the topic may not be a repairman.
And this is his option for restoring the operation of the device.