Lenovo PC dead after 15 months- advice

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km1500 said:

I'm guessing that it is unlikely to be the power supply because otherwise the laptop would turn on on battery

I didn't read anywhere that the OP said this is a laptop.

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RefluentBeans said:

Go back to Very and explain the situation. It may be that there is a trip in something like the power supply and it requires turning on and off again. But they can talk you through that, as well as diagnose a fault. 

As a word of caution - computers are like cars in that they have multiple components. Thus your expectations should be adjusted as so. Replacing a component may be possible and more likely but you likely won’t get a whole computer replacement. 

As lunatic said - they may ask you to show the fault was inherent. But they may not - I would go in with a more open mind (rather than accusing them of giving you a faulty product etc). They may be willing to help just because they sold the product to you. 

Alternatively, you can try a computer shop if there’s any near you. They may be able to examine the device and repair it for cheap, but this may void future consumer right claims.

Power supplies are not user serviceable (and for VERY good reason) so they do not have anything inside that would trip and be resettable. Whilst it may the the power supply that has blown (it may have its own fuse) it's not something most people should be even opening, let around poking around in.