Re: Dell 2407 wfpb no backlight


No short there, it shows 2mega ohm



There is 2.3Kohm between out of 78m05 and gnd



the 7805 is fed through Q2 an pnp transistor that also seams to be ok, so i belive the 5v circuit is ok, must bee someware else
the Fuse f1 also supplys U1 an 324, and probably a bunch of other components. there are 3 220uF electrolyts on the board, i have ordered some and will replace them...

Hi i got an Dell 2407 and the backlight stopped working while i was watching a movie.
The power light and input nr is on, but no backlight.
i have opened the monitor and checked the power board an i seams fine, have also checked most of the voltages and they are fine.
The fuse F1 on the inverter board is blown, and i get 19 volt on the one side comming from the connector,
so the question is what caused the F1 fuse to blow ?
I have checked all the diodes, the three big 2.5A fuses and most of the transistors, they all seams ok.
do you have any suggestions...

Re: New Members - please post your introductions here

Hi everybody, found this informative forum when i was searching for info about my Dell 2407 monitor that suddenly died on me.