NO!!! That is a blanket statement and like all blanket statements, it is wrong.
I have done much research on this - to include taking business law classes before I started my own custom PC and IT consulting business. I needed to learn my rights as a business owner.
The consumer is allowed to do "
routine" maintenance tasks - such as changing the oil and filters, rotating tires and such on your car without voiding the warranty. But if you use the wrong oil, or strip the drain plug threads, or fail to tighten the filter properly, repairs will not be covered by the warranty. And for the record, if you do all your own oil changes, keep your receipts so you can prove you did the necessary routine maintenance as required by the maintenance schedule.
In terms of computers - this came about from those little "Void if seal broken" stickers. In some cases, they are legal, in other cases they are not.
We, as consumers, are allowed to add RAM to our computers. Or a PCIe expansion card or extra drives. Therefore, we can open the PC case and not void the warranty (see *EXCEPTION below). But if we damage the RAM or slot or something else inside through mishandling, that is not covered.
The key is whether or not there are "user serviceable parts" inside, or not.
There are no "user serviceable parts" inside a PC power supply, for example. Therefore, those "Void if seal broken" stickers on power supplies are legit and you do void the warranty if you break that seal.
*EXCEPTION: A PC maker can legitimately void the warranty if you open the PC case
"IF" they provide all maintenance (including "elective" tasks - like adding RAM, cleaning out dust bunnies, etc.) 100% free of charge during the warranty period.
In the case of the OP and his computer in this thread, he is troubleshooting a
broken computer while it is still under warranty. That is NOT routine maintenance and therefore, there is a risk of voiding the warranty.
@Eedat - In looking at your image again, I don't see any damage. When I first looked at it, I thought you were talking about the slot, which initially to my tired eyes, looked like the contact metal had pealed off. I was wrong. Sorry if I caused confusion there. If you meant the right most contact that does not go down to a point, that is fine.