I have no involvement with your warranty claim. Though, in my opinion, you should not have disclosed this,
I bought a Lenovo Legion Pro 5 (83DF00CDSA) from Evetech in June 2025. The listing advertised 3 years warranty.
In May 2026 the fans started making a bad noise under sustained CPU load. I sent it in for warranty repair of the fan fault.
A few months before that I spilled a small amount of coke on the numpad. The keys have been slightly sticky since. I never sent it in for that and I never hid it.
PartServe found liquid residue on the keyboard and voided the entire warranty. Not the keyboard. The whole unit.
I pointed out that the Lenovo Limited Warranty (L505-0010-03) excludes...
They concluded that there was liquid damage, and you apparently agreed to it? I am not touching on your determined causation requirement, but by reading the thread, Partserve seemed to have voided the warranty due to contractual consequences. That said, you do have the right to challenge them, and by all means, go ahead.
I did take notice that you opened a public case with Lenovo,
I do hope that all parties can arrive at a solution. A standard assessment will include whether moisture is detected; there are special indicators used in determining such 'events'. Partserve should be able to provide that service report, which will include the assessment details.
Since, in the current situation, the warranty is deemed void, may I ask how much they quoted to repair?