Re: Samsung Syncmaster 245BW

back to message #380.
The 3 resistor problem was it

I opened the box and tried the wooden stick approach to stop the beads moving- no effect. I unsoldered the resistors and one had no resistance. So I replaced them all with 3W 68 ohm resistors and it worked. the noise went away

Thanks a lot.

Re: Samsung Syncmaster 245BW

Thanks very much for your insights- I am very impressed . "Toasty" Since we also considered that the noise source was the heatsink on first examination but then thought that it can't generate noise since it is just a heatsink that sounds like it might be the issue. So I'll try the wooden stick approach that next time I take it apart (to replace the 3 resistors)- the ferrite beads are pretty small I assume. If it works I guess I need some goop, e.g non conductive something to stop the movement, what can a layman use, the goop that is used to...

Re: Samsung Syncmaster 245BW

Thanks for all the suggestions. Note the monitor works but just makes this annoying fan type noise

I opened up box again, took a number of pictures, and got it up and working with the whole thing dismantled. We took a cardboard tube and listed. 2 of us couldn't really locate the noise, only generally. Using a a doctors stethoscope we concurred that it seems to be the white "2J 6843, SIC 460S (on the board is written CP801)" but we could have been mistaken and our next bet was one of the blue units in the direction of the fuses...

Re: Samsung Syncmaster 245BW

.. and thanks PlainBill for the suggestion with the stethoscope. I'll try that . the sound seems to be coming from the PSU but I couldn't see how to isolate the noise (which is louder when a PC picture signal is on, relative to just power on). I guess photos are required of the component side of the PSU board ? I have tried recording the sound but the transformer sound swamps the clicking sound on the recording, it's clicking about 10 times a second or more

Re: Samsung Syncmaster 245BW

I took a photo before rebuilding it. unfortunately I haven't got a perfect picture of the BN but reads like BN44-00173A, whereby the 4-00173A is readable, ( the 00 and 3A in this string are clearly visible)

Re: Samsung Syncmaster 245BW

I have a 245B . This week it started making a constant clicking sound as if a fan was running badly, clicking multiple times second. Otherwise it works fine (except for a loud crack every now and then as if plastic is expanding but it has been doing that ever since I bought it). I called Samsung but it is over 3 years old, and they told me it is most likely the power supply. I have opened it up and found no fan or obvious problem on the PSU and then found this forum and read through 19 pages without finding any similar problem. is it the beginning of...