🚀 go-pugleaf

I'm having a problem with my AcerView 76i 17 inch monitor. Every now and
again, the contrast will flicker higher and lower a few times, then return
to its original setting. The effect is only small - the monitor has digital
controls, and the contrast can be adjusted from 0-99. I'd estimate that
the flickering is only 1 or 2 points on this scale. 

When I asked my vendor about it, he suggested that it might be dirty power
being supplied to the monitor, and I should check for things like fridges,
washing machines etc. that might be introducing spikes into the power supply
(this is in a domestic environment). I couldn't find any obvious
correlation, and the problem didn't occur frequently, so I just forgot about
it.

Well, now it's happing about every 10-15 minutes, and it's getting pretty
bloody annoying.  A friend had a 15 inch Acer that exhibited the same problem, 
so I'm suspicious of the monitor itself rather than the power supply 
(particularly as the problem is getting more frequent).

So has anybody seen this before?

Thanks,
Geoff...