legally in the uk they cannot refuse warranty unless they can prove you did the damage (they have to prove it not you).. regardless if you took it apart or not. warranty stipulations DO NOT override the law. in the uk we have 6 years to have an issue resolved if found. checked the consumer rights law its all on google...
"It is important to remember that a guarantee does not replace
or limit a customer’s rights. Customers are entitled to raise
a problem with you regarding a product for up to six years
from the date of purchase (five years from the discovery of a
problem in Scotland) regardless of the terms of any guarantee.
Customers are entitled to rely on the remedies available to
them under law (outlined in this guide) rather than their rights
under a guarantee, if they wish.
This means that if a customer complains to you about an item
that is not fit for purpose, does not match the description, or is
not of satisfactory quality, you must deal with their complaint –
you cannot force them to use their guarantee.
Faulty goods, no acceptance (Up to Six years from date of purchase)
If the item does not conform to contract (is faulty) for any of
the reasons mentioned previously, and the customer has not
accepted the goods, the law says the customer is entitled to
• reject the goods and claim a full refund, or
• request a repair or replacement if that is the customer’s
preferred option.
As the retailer, you can offer a repair, a replacement or
a credit note, but you cannot insist on any one of these.
It is the customer’s right to receive a full refund in these
circumstances.
Where a customer is entitled to a full refund because they
have not accepted the goods but have agreed that you may
repair or replace the goods, they can still claim a full refund if
the repair or replacement is
• taking an unreasonable time, or
• causing an unreasonable inconvenience, or"
https://www.citizensadvice.org.uk/a...e-consumer-work/the-consumer-rights-act-2015/
