Medion MD 20165 Monitor backlight fault

[netdent]

Hi Looking for some help advice, I have a Medion MD20165 pc monitor that has a problem with the backlight, it comes on at first but will go out after a few mins! putting on and off again restores it again for varying amounts of time but mostly goes off after 2 to 5 minutes, was just going to replace the psu but having problems finding one, closest I got was this on-

http://www.ebay.co.uk/itm/1210047821...84.m1423.l2649

Which is almost identical but the numbers don't match up, any help would be most welcome, will post some pics of the psu/invertor