dell 2007 WFPb monitor ,no lights

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

thank you selldoor,
yes i made sure there was an image from the cpu,looking at it in the good monitor and then hooking it up to the bad monitor.
i did an extra test ,just to make sure i had a good working backlight,=.
i followed a test shown on one of you guys thread and it worked like a charm.
i am attaching pictures of it.
i tried it the same way before and i got nothing,zero,zip.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

thank you davi
yes ,i hooked up a cpu with an image and got the same thing.
i did an extra test ,to make sure the backlight its good.
and it worked.
its from one of you guy's thread.
i am attaching pictures of it.
its 2 lamps connected in place of the lamps from the screen,a 13 watt and a 14 watt,they look bright.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

pardon my ignorance selldoor ,but,what does "lvds"
mean?

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

and what cables are you talking about?

[budm]

Re: dell 2007 WFPb monitor ,no lights

The cable between the main board and the LCD panel.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

thank you bud,
yes it is hooked up.
did you see the pictures ,i read this test at one of your postings and it works really good,it a 13 watt and a 14 watt lamps

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

i am going to be out for 2 to 3 hours,looking for a long range anntena.
but,please keep posting ,i will read them and reply to you guys ASAP.
thank you everybody

[Davi.p]

Re: dell 2007 WFPb monitor ,no lights

My god... i'm understanding few of this thread then, i guess.. it seems (but you can explain it better) that you have done the budm's old CFL test, i see only light, no lamp but since there are connection with ades. tape... it seems so, then is that what you meant when you've said "now backlight works" after you replaced that cap on main board.. now i have told it many posts ago, i suspect bad lamps but you don't want to follow my directions.. so when you decide to do them i'm here...

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

thanks davi,
the lamps i use to test the backlight are bright ,and that is why you can not see them.
but that does not matter right now.
i am sure now that we have the voltages we need to have a good backlight.i didnt have them before .
in one of the test points i had 0v,and after i did the replacement of the cap then i had 3.3 volts there and that is when i had a steady backlight.
i soldered 2 outside lamps to confirm and make sure the backlight voltages were all there and the lights are bright ,the tape is so i can connect and remove the lamps quickly,and so i dont touch the wires and they dont short out to the chassis or any part of the unit.
i am taking into account ALL sugestions,dont take it personally.
i suspect the lamps still almost gone and i am asking EVERYBODY to give me some input about that,that includes you and everybody else.
right now the problem is,i do not see any data on the screen.
i made sure i had a display with a cpu connected .
i shinned a flashlight to the screen,sideways,frontways and i see just the backlight.
your advise is always welcome,everybody's advise is.
thank you.keep posting

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

hello everybody,
i got me a new anntena y is working great,i can connect almost instantly.
i am ready to try any or all the test you guys suggest.
thank you everybody for your patience.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

any sugestions bud?

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

help anybody,what do i check for no video on this monitor?

[budm]

Re: dell 2007 WFPb monitor ,no lights

Check the SMD fuse on the T-CON board, see if it has either 5V or 12V on both ends of the fuse.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

thank you bud,the tcon board is the one attached to the back of the screen,covered with a metal plate?

[budm]

Re: dell 2007 WFPb monitor ,no lights

Yes.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

thank you,i ll get back at you soon

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

ok,the fuse its open,its labeled F1 ,it has the letters FK on it.
is that the rating,or value of the fuse?
what can i use?
there is another fuse labeled FB2 ,that one is ok.
correction it has the letters TK.
sorry my eyes are not the greatest anymore.

[budm]

Re: dell 2007 WFPb monitor ,no lights

FB = Ferrite Bead, it is an inductor, not fuse.
What DC Voltage do you get on one end of the fuse?

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

sorry bud,
correction,it has the letters TK stamped on it,
i said FK.
i am going to take the readings across it anyway.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

i get 11.9 vdc on one side,0v on the other side.