and do not have one.
But...if a choice has to be made re repair/upgrading one versus a new one...I think warranty considerations have to come to the forefront.
Most laptop users don't have the capability of repairing them...so some provision for warranty coverage is important. The ease of repair and troubleshooting that prevail on a desktop...are lost when using a laptop.
To assume that it will work perfectly for whatever length of time used/owned...is somewhat irrational.
In short, if the one you have is under warranty/repair provisions of some sort...I suggest positively letting the dollars decide.
If not, then get a new product with components and contingencies which are covered for at least a year.