I have just bought a NEC LCD2690WUXi 26" display which has a high pitched, low level, but very irritating, hum at about 200khz - it is not a typical mains hum (it's actually pitched at G# four notes below middle C). The hum cannot be heard in a busy environment but is very intrusive when you are working in a quiet environment - I use my display for close, graphics work. NEC have not been able to fix it and take the view that it is within their normal specifications (which do not refer to any noise).
I'd be grateful to know from any 2707 owners whether their display is absolutely silent - from the front at a distance of about 50-60cms.
It would be helpful to know, please, whether your display is made for Europe or North America - there is a suggestion that the NEC noise issue may be related to mains voltages as very few US 2690s appear to have had the noise problem which is retstricted to European models.
Thanks. On the NEC, Brightness levels do affect the quality of the high-pitched hum (it coarsens a bit) a little but not its volume level. The hum remains whatever the Brightness setting.
I'd still be grateful to hear from any 2707 owners.
gpro
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Posted April 18th, 2007 01:00
Try turning the brightness down. Have a look at this -
My LCD monitor utters this high frequent, buzzing sound