My experience is 15 years out of date, but back in those days many "big brands" insisted we only use their repair centres, and all we could do was ship stuff to them and hope for the best. Some were a little more flexible in this than others, but the flexibility was always very limited.
Especially with components like mainboards or GPUs this could be awkward, because turn-around times were often weeks or even months. We usually just replaced them without too much fuss, and then a month later we were sent back a repaired spare part that could perhaps maybe be used for a repair later. We generally accepted this as a "cost of business", but never seemed quite right to me.
While turnarounds on laptops were usually fairly decent, they could also be weeks, and replacing a €800 laptop on which we made €50 profit was kind of a non-starter. This also included stupid stuff like broken memory modules, or a broken hinge cover. The only way we could get reimbursed at all was by sending the entire laptop to them and hope it didn't take them 2 weeks to spend 5 minutes replacing a broken RAM module or something silly like that.
My point in all of this being: it's not necessarily the store's fault.
Especially with components like mainboards or GPUs this could be awkward, because turn-around times were often weeks or even months. We usually just replaced them without too much fuss, and then a month later we were sent back a repaired spare part that could perhaps maybe be used for a repair later. We generally accepted this as a "cost of business", but never seemed quite right to me.
While turnarounds on laptops were usually fairly decent, they could also be weeks, and replacing a €800 laptop on which we made €50 profit was kind of a non-starter. This also included stupid stuff like broken memory modules, or a broken hinge cover. The only way we could get reimbursed at all was by sending the entire laptop to them and hope it didn't take them 2 weeks to spend 5 minutes replacing a broken RAM module or something silly like that.
My point in all of this being: it's not necessarily the store's fault.