This has been happening for about a month now.. Each time I power up my LCD screen (a brand called LIKOM - about 6 yrs old now), it makes a loud 'electronic squawk/fizzing noise'. This is sometimes accompanied by the screen displaying only large random boxes of colour, or a severely distorted version of whatever the image should be. Usually switiching straight off and on again sorts it out. But is it on its way out? and is the noise it makes, together with the disorted image indicating it may be dangerous in any way?
It does sound like a power supply/invertor problem. Most likely a dried out electroylitic capacitor or possibly "dry" soldered joints... too complex to explain here "why" it makes it do that, but a shame if that's all it is... the components cost peanuts. The way of the world unfortunately, beyond economic repair I would guess.
From your posts you seem to be inferring that the issue is with the external power cord? This is NOT hard wired in and therefore replaceable, so in response to the way I am reading Mooly's reply, the monitor itself is still OK?
If the cord is faulty I'm sure it would show up by waggling it around at the connector/plug ends. Give everything a good tap, monitor, adapter etc. Whatever is happening sounds like it is "arcing", or that a major "corruption" of the voltages needed within the monitor is occuring. A faulty invertor alone (the invertor produces a high voltage of several hundred volts that is used to power the backlight tube/s) would normally cause just a brightness or black screen issue. The fact that yours from what you say "corrupts" the data (random boxes of colour etc) suggest electrical arcing etc, possibly invertor related. Does the noise come from within the monitor or from the adapter. Are there speakers in the monitor ? does the noise come from those. Without actually seeing and hearing diagnosing at a distance isn't easy :)
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