Each key makes a connection between a different pair of terminals on the circuit board underneath the keys. The g, h and and Delete keys obviously share a common part of the circuit board, which has a broken connection. It's not worth trying to repair it. Tesco will sell you a new keyboard for £4.97.
I'm using a PC with a fast processor, plenty of memory, a fast DVD-rewriter (and a separate CD drive) plus good quality sound and video cards, that came with a clean, unregistered installation of XP Pro, plus the keyboard, speakers and an LCD monitor. I paid £15 for the lot (at my favourite auction house).
I am temping at the moment and so have experience of a lot of different keyboards. Some of these I find quite appalling. The worst remind me of Sinclair Spectrums, like typing on rows of Jelly Babies.
At home I have a Cherry MX 3000 which I have had since early 1990s and I love it. It is built like a tank with a fantastic key action, engraved keys with no sign of wear even with virtual daily use. It is now on its third computer and I have no doubt it is capable of seeing me off this planet.
Scotman, I use a rebuilt 1995 IBM keyboard that cost me 200 dollars and was well worth it). But when it comes to most modern keyboards, they are all the same rubbish, whether you pay 100 quid for an all singing-dancing multimedia keyboard of a fiver for a Tescos one, the action is pretty much identical.
Do you mean the keyboard style that came with the early IBM desktop PCs? Really well built quite large things with a good action. I agree they were excellent also.
I seem to recall that I paid quite a bit for my Cherry keyboard but I think it was money well spent. I have also invested in a quite expensive graphic tablet and pen instead of a mouse and I am really happy with that as well.
"Do you mean the keyboard style that came with the early IBM desktop PCs?"
That's the kind of thing. There's a company in the States that specialises in rebuilding them, using IBM's original buckle spring mechanism.
Prior to this, I had a 1994 Dell that I found in a skip. It weighed about a kilo and was excellent!