Re: HP w2408 LCD - Buzzing Noise when Brightness < 100%

Thanks for the reply. The buzz does appear to be coming from the inverter board, but I can't seem to isolate the buzz to any one component. There are 12 transformers on the board so I thought I would start with replacing the caps to see if that helps. I haven't diagnosed an issue like this in the past, so I'm open to any and all recommendations.

Re: HP w2408 LCD - Buzzing Noise when Brightness < 100%

So, I've got some 470uf 35V capcitors. However, they are temperature rated 105C. The capacitors on the inverter board are rated 125C. Can anyone tell me if the different temperature rating is relevant in this application? Do I need to order some 125C caps?

Thanks!

Re: HP w2408 LCD - Buzzing Noise when Brightness < 100%

... and moments after I posted my question I saw the excellent sticky post by 'retiredcaps': [url]https://www.badcaps.net/forum/showthread.php?t=10419[/url]

I'll probably start by replacing the capacitors (470uf 35v) because that is easy and the caps are 10 years old.

If that doesn't do the trick, I'll try testing for dying CCFL tubes by disconnecting them one at a time and connecting another CCFL in its place. I'm just not sure if bad CCFLs buzz (or might cause the inverter to buzz) when...

I have an HP w2408 LCD that makes a constant buzzing noise when the brightness is less than 100%. If I turn the brightness all the way up to 100%, the buzzing stops. It has been making this noise for years, I've just now decided to try to do something about it! Except for the buzzing, the monitor works great.

I'm not sure if the issue is with something on the inverter board or the CCFL tubes themselves. I've been searching the forums, but haven't found another post that has a solution to this issue (yet).

I've disassembled the unit, but I can't seem to isolate...

Re: New Members - please post your introductions here

Hey - Fritz from California here. Had some free time on my hands so started trying to fix some old electronic items I've been hanging on to. The problem always seems to be a capacitor, doesn't it....