Re: HP 2509m won't turn on, no power to ON/OFF LED

[QUOTE=Davi.p;591264]Wich part have you put instead of the originals? I would like to say that for me the half screen backlight sympton is not because old ccfl,

I replaced the originals with:
N-Channel MOSFET: STD20NF06LT4
P-Channel MOSFET: IRLR9343PBF
Diode: SS26
Didn't touch the ccfl tubes, just changed those components. Monitor worked perfectly for about 2 minutes, then screen went black. Diode was open both ways and transistors were bad also. Thinking it may be something upstream causing...

Re: HP 2509m won't turn on, no power to ON/OFF LED

Thanks to all for the great info. I managed to change the two transistors and the diode. This was my first time working on a SMT board, so my soldering wasn't perfect. The monitor worked for about 2 minutes and then the display went black. I checked the diode and it was open both ways, and the transistors also were bad.
Is there something I missed, did I possibly overheat the components when soldering. Or is there a faulty component upstream that I should have checked.
Thanks
Ed