Our computer repair workshop in Perth sees all sorts of computers, from the very new to the very very old including those running Windows 98.
We always give objective advice on computer repairs. Sometimes a small and cost effective repair can give an old computer an extend life. On the other hand, laptops that are perhaps 3 or 4 years old that have suffered a liquid spill and just not worth repairing.
This machine came in this morning as a non-boot.
The power supply had popped and had taken the main processor with it so it's just not worth repairing when you can purchased a fully refurbished computer with a guarantee for only £99.99 inc VAT
So if the inners of your desktop looks like this, you might want to consider replacing it sooner rather than later.