At my last works one of the saws went down and we got a quote for £6,000 for a new PC to run it.
I took the processor out of a scrap machine I bought for £5 and slotted that in. It booted up and ran fine.
That saw was still running happily years later when I left.
In my current place it looks like the back light has failed on the screen of a £50,000 CNC corner cleaner.
Of course the only quote from the engineers is £5,000 to replace the whole PC, they think they have companies over a barrel.
As soon as possible I'm having a go at that. You can get back light bulbs for £1.25 on
ebay and inverters for £2.50.