Lenovo All-in-one Desktop C340 Doesn’t Power On

Here's one easy hack for starting an all-in-one desktop for those that have not been entertained or ripped off by lenovo service centres. This hack is a temporary solution. Eventually the laptop will have to be repaired by a professional. Lenovo does not entertain any products after the warranty period expires. However they do repair their products "unofficially" for a fee and without any receipt. Remember to switch off the power and unplug the device while the back cover is taken off.