How can I find out which products have not had "planned obsolescence".?

Except for certain printer cartridges/drums, I don't know of any consumer products with a "micro chip" that causes them to fail.

What you call "planned obsolescence" is primarily caused by companies deciding to cut costs by.

-Using the cheapest parts possible that will probably last through the warranty period. Cheap capacitors are a common cause of early failures of electronics.

(Note: It's not easy to test the life of capacitors, even better manufacturers will get a bad lot in from time to time. But some capacitor manufacturers have a lot better reputation/track record.)

-Having a philosophy of not spending any money on problems that don't occur until after the warranty expires. For example instead of using a bearing designed for long life, they use a smaller/cheaper one that's just good enough to avoid excess warranty costs.

-Refusing to supply repair parts. Things like washing machines are an example.

>I want to know which products are fitted with planned obsolescence so that I have a real choice

So start reading "Consumer Reports" magazine. They make it their business to know which companies products have high failure rates.

There are other ways to tell. Some companies develop reputations based on how they act over time. For example, on average Toyota cars hold up much better than GM cars. So many people know this that Toyotas hold their resale value much better than GM products.

And if you do some digging, you can find out how long washing machine companies supply repair companies supply repair parts.

What you describe would be illegal.

No manufacturer plans for forced failure.

All products fail, some faster than others. New products are so much complex that the prob. of failure is simply higher.