The point is it's so rare even you have not seen it happen.
Says who? Twice now you have said I have not seen it happen. Where did I ever say that? I didn't. So why are you making stuff up? Why are you pretending you can speak for others and claim you know what others have seen or not seen. Not only is that deceitful and misleading, it is not helping the OP, or anyone else at all - and certainly instills no trust at all in anything you say, Frick.
For the record, here is what we have seen in my shop, NOT OFTEN, but on more than one occasion over the years.
A system did not successfully POST with beep codes "suggesting" a bad CPU. Trying the CPU with another,
known to be good motherboard and that did not boot there either further "suggesting" the CPU was bad. Installing a 2nd,
known to be good, CPU into the first board and now it does not boot either. Installing that 2nd CPU into the 2nd board and now it no longer works - this after it did work fine until this swapping around. Installing a 3rd known to be good CPU into the 2nd board and it now boots and passes POST just fine.
This "suggests" the first board was bad and it took out the 2nd CPU.
Can I prove it? OF COURSE NOT! Just another problem with electronics and destructive forces that occur without any sort of visual or aural indications. Did we zap it with ESD? Not likely because we
always take necessary ESD precautions even though modern systems are less susceptible to ESD damage.
having some CPU's is not a bad idea.
Who said otherwise? I specifically said back in post #24 that "
a stash of common CPUs is essential". So who are you trying to impress or kid here, Frick? Yourself?
it's not a massive expenditure, is my point
Are you really that naïve? Seriously? Have you any conception of the expenditures involved in starting up a "legitimate" business? Even out of your basement or garage? Obviously not.
Sure, if you have $1000s in your pocket burning holes, no problem. But the vast majority of people who start small businesses are doing so by mortgaging their homes, cashing out their 401Ks, maxing out their credit cards and borrowing from banks, friends, and families.
It is totally naïve of your to suggest it is not a big expenditure. There are literally dozens of different AMD and Intel sockets still in use today. A tech would need at least 1 spare for each socket and more likely at least one for each chips set. That would be a HUGE "investment" - especially is trying to buy new.
As you correctly noted, new components will be under warranty. But someone has to troubleshoot down to determine which component needs to be RMD'ed. Who is going to do that? The tooth fairy?
That leaves the older/legacy systems. And you want use to believe a couple spare CPUs is all the a "reputable", capable tech needs? No way! So again, you just have no sense of reality. That is NOT meant as a criticism but just a simply, and clearly obvious observation - from someone who has been there, done that.
It's not a massive expenditure, is my point
Sorry Frick, but you are either delusional, totally ignorant of the reality for what it takes to set up a new shop, or have a sense of entitlement from being born with a silver spoon in your mouth. So some combination of all of the above. You talking
again about a €250k/$250K truck just illustrates that.
It is a HUGE "investment" starting up any business. Computer repairs is no exception.
I see no reason to discuss then further unless the OP has a question. So I am outta here.