On Wed, 06 Aug 2008 23:27:21 GMT, "d6xkr via ElectronicsKB.com"
u45258@uwe wrote:

actually there is that diode just after the smps transformer but i don't know
exactly if it is operational or not as it didn't grab my attention. i'll
check on it in the morning.


The Diodes after the the SMPSU are secondary rectifiers, they're most
probably ok.

You are looking for a big diode like this:
http://www.nxp.com/acrobat_download/...ts/BY448_2.pdf
near the line output transistor, this is the transistor most likely
screwed to the aluminium box/heatsink surounding the line output
transformer. http://en.wikipedia.org/wiki/Flyback_transformer

I have seen this diode fail, in a few monitors, when it fails it
effects width and east/west correct,(pincusion).
All this said its been at least 10 years since I was fixing monitors.


Good luck,

Robin