Well this is going to save our old eyes !
So fault finding without the circuit/schematic will also be fun if we think a resistor might be high.
They claim "green" reasons for not printing on the components, but I reckon its just money.
If they wanted green they wouldn't contribute to throw away devices.
As an example from UK and South Africa :-
Philips TVs in the 70s were well thought out for the service man, the panels would hinge for access , and there would be plug-in modules. All the components were well marked, and each TV came with a circuit/schematic and component layout inside. The crt would last 10 years ( Philips had a history of experience with vacuum devices like light bulbs xrays etc )
They had a faithful following who would only buy Philips TVs because they lasted 10 years, where others would only last 3.
But of course they sold a lot less TVs than the other makers, so suddenly from the K9 chassis, the CRT would weaken after 3 years, like everyone elses, no more circuit/schematc in the back cover, no helpful access for repairing.
I guess you cant blame them, its progress ......
Meanwhile it seems cars got more and more reliable, but let rust and fashion dictate when a customer would buy a new one....
Old farts bar talk, who's round is it anyway ?