I have a couple of Nokia (NEC) flat panel displays which have the same
(typical?) problem. When I switch them on, everything is ok for few seconds
(2 in one of them and 4 in another) and after that monitors switch the
backlight off. The monitor powersupply is all the time ok, no change in the
voltage. I have followed the problem to the inverterboard (NEC HIU-391C)
which supply the backlights but there, without any shematic, my skills are
not enough. Have somebody any experience to help me?