While this is OT, but I want to share my point of view from a technician side. Customers not buying warranty is in fact a good thing, that means more business for me when things happens. Most of the time, customer's desperation to get it up and running in short period of time means they will pay for it even if you jack up the price.
Since I fix all major brands of notebooks, other than Panasonic and high-end Sony (made in Japan/USA models), all of them share a common problem - mass production somewhere in Asia.
Mass-production means higher output at the lowest possible cost, higher inventory turnover means increased product cycles, in the end, more profit.
That translates to poor quaility and workmanship. Take Apple for example, the newest MacBook Pro... the workers in Shanghai put an excessive amount of thermal paste on the CPU (more like scooping them with ice-cream scoop). The notebook fans dies prematurely because of poor heat transfer. Once I replaced the thermal paste to a thin layer, notebook temp dropped over 10C and fans do not kick in as often.
Unless you are a DIY person and have access to parts + service manuals, repairing a notebook is not advisible. Each models has their own tricks to open it, and things are just getting too fragile these days.
I would suggest extended warranty directly from the manufacturers, not the retailer. Because when things happens, manufacturers will fix it according to their standards, not some shady places who can fix things cheap by using old/refurb parts.
Common things that could go wrong in 1 year:
1) hard disk - easiest thing to die, especially from Seagate model Momentus 5400.3.
2) Motherboard faulty - most of the time due to ESD
3) Recovery Partition not working
4) Optical drive not reading
Common issues w/ notebooks that could go wrong after 1 year:
1) LCD inverter failed
2) Fans not working
3) Power connector loose
4) keyboard keys hard to press
5) Battery not holding charge
Sony and Apple are known to be costly to repair. Can definitely consider Sony Care or Apple Care.
On the other hand, HP and Compaqs seems to have a much lower repairing rate for at least 3 years. Machines that are brought back for repair are mostly Pentium 4 M or Pentium M based.
Philip |