The problem with small form factor hardware.
Laptop hardware repair is trickier than desktop repair, for two reasons: (a) the cases and components are harder to get at and (b) the parts - aside from the RAM , drive and Wifi unit - are typically custom for that model. That means that if anything other than the RAM, wifi unit or drive go wrong, it's hard to fix the device without finding another of the same model.
On very old laptops 90% of the time the hard drive is the part which fails. Those are easy to replace and clone to a solid state drive. The difficulty comes when the hard drive is extensively damaged, and then it becomes difficult to get your data back. Hard drives have a median lifespan of 6 years and 1/4 of them fail within the first 4 years, so Always keep your data in two places at all times! On a backup drive or in a cloud service like Google Drive.
Chargers and batteries are easy to replace, however if a power unit within the laptop or the motherboard is failing, unless an equivalent model is available on the second hand market, you're looking at a new laptop. A damaged screen is easier to fix, with replacement screens generally costing around $100-$200. If you need something repaired or are uncertain whether your laptop problem is hardware or software-related, get in touch!