Please note I know next to nothing about PCs, so any answers need to be in 'Janet & John' mode.
When I start up my PC I get a white screen only. This also happens when screen goes into standby for more than a minute. Is this likely to be a graphics card issue or something entirely different? Whatever it is, how do I resolve it?
When it first occurred I simply switched the monitor off and back on and hey presto, the icons appeared. Now I can be switching it on and off 30 times or more before the icons appear.
If you keep switching it on/off and suddenly find it works, all without touching the PC then that's a fairly good clue. Have you tried the "waggle test" and the "whack test" on the leads and monitor ;)
If you ever update graphics card drivers etc always create a restore point first so you can "go back" if there were ever problems.
OK next thought is - On the back of your PC where the monitor is plugged into, are there 2 sockets for the monitor? What i mean is, does the PC have a dedicated graphics card? If there are 2 then change the monitor plug over to the other one then see what happens!