dell 2007 WFPb monitor ,no lights

[budm]

Re: dell 2007 WFPb monitor ,no lights

To be sure, can you get the LCD panel model number so we can look up the spec sheet? I am not sure if 20" LCD panel uses 12V for running the T-CON board.

You can set your meter to read DC AMP, then put the probes of the meter on each end of the fuse to read the current draw, double up the reading for the fuse needed.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

thank you bud
the number on the back of the screen is:LM201W01
under this numbers are the letters (SL) (C2)
there is also a bar code number that reads:LP-201C2-F-F-D-KU-5-813-0458
I 'll try the reading now

[budm]

Re: dell 2007 WFPb monitor ,no lights

This one is close to what you have, it is 12V for T-CON.
http://www.panelook.com/LM201W01-SLC...view_4894.html
https://cdn.badcaps-static.com/pdfs/...f9cfdf9409.pdf

Some info about Dell monitors:
http://en.wikipedia.org/wiki/Dell_monitors

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

wow,that was a fast search.its definitly a good display.
i am still setting up for the current test.
i will post the results asap.
thank you

[budm]

Re: dell 2007 WFPb monitor ,no lights

BTW, according to the spec sheet, max current draw is 708mA, so 1.5A fuse can be used.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

thats good,
for the time being i am going to have to short the fuse with a thin wire.
i have to be away for a couple of hours so i can go look for this fuse,i dont think i will find it here in mexico.
i am set up for the current test (i guess i dont need to do that now right?)but my meter is not reading current ,so i have to find 2 fuses that are blown up on it too.
i am going back home to mcallen texas i a couple of weeks,if i dont find what i need here then i ll get them over there.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

ok bud,
i am back ,and i did not find the fuse for the board nor the ones for my meter.so i can not use the current mode on it
.the meter needs them for the 40 ma and 10 amp scale.
so,i jumped the fuse on the t.con board and i got no picture yet.just the backlight.
i did notice that now the numbers on the plastic bezel for the on/off button go to #1 first ,stay on for a second ,then goes to #2 and goes back to 1 and remain there.
it didnt do that before ,it stayed on 1 all the time.is this some kind of self test ?and what does it check?

[budm]

Re: dell 2007 WFPb monitor ,no lights

T-CON board may have shorts circuit that is why it blew the fuse, if you disconnect the LVDS cable, then the problem you are see with ON/OFF button will go away that will indicate the T-CON board is loading down the circuit.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

ok bud,ill check for shorts,any particular component by experience that you know of fails the most?
i am not sure i explained too well my concern or question.what exactly are those numbers that light up from 1 to 2 on the front bezel?they go up to 4 and remember very vaguely they all lit up at one time,when the monitor was working,dont remember the order.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

i disconnected the connector to the t-con board and i have the same results,i tested the votage at the fuse before that and its 12 vdc at both sides of the fuse,in reference to ground.

[budm]

Re: dell 2007 WFPb monitor ,no lights

I am not sure about the problem of the LEDS on the front panel. If you do have the 12V at the T-CON but still no pictures on the sceen, then it can be one of the two: the main board is not sending the signals to the T-CON, or the T-CON is dead that was why the fuse blown.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

should i check to see if the main board(the logic board ?) is sending the signals and how do i check that?

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

i am turning in early tonight ,its friday and tomorrow saturday i have to get up early at 6 am and do some weekend stuff,be back late afternoon tomorrow.
thank you all!!!!

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

good morning if anybody has any sugestions as to where can i start at the step i left which is no input from the logic bd to the t-con board i will appreciat it.
i have been thinking to just send for a logic board ,but i am not 100% thats what is what is wrong.
meanwhile i went back home and got me 5 viewsonic monitors i had stored to work on them sometime in the future.
1 worked so i do have a monitor now.
please help with the dell monitor .

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

its lonely here guys!!!!!!
post something for me

[selldoor]

Re: dell 2007 WFPb monitor ,no lights

should i check to see if the main board(the logic board ?) is sending the signals and how do i check that?

You connect it all up and plug in (but not turned on) take a voltage reading on all pins on the connector between power and main.
Then switch it on and do the reading again.

Once you have those there is sometimes some pins where the voltage changes
when you press the on button then changes back.

It is a lot easier when you have a schematic or the board is labelled so you know what they should be.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

thank you selldoor,
i am getting it set up .i will post the results in a few minutes.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

here are the readings and a picture of the board.
readings where taken at the j6 connector ,i labeled them 1 to 7 from left to right ,with the components facing down.
j6-1=19vdc with power off, 19vdc with power on.
j6-2=19vdc with power off, 19vdc with power on
j6-3=0vdc with power off .008vdc with power on
j6-4=0vdc with power off .008vdc with power on
j6-5=0vdc with power off, 3.29vdc with power on
j6-6=2.77vdc with power off,2.77 with power on
j6-7=0vdc with power off, .006 with power on.

[selldoor]

Re: dell 2007 WFPb monitor ,no lights

Sorry whilst that is always useful to know it has little bearing on your problem. I thought you meant signals to the power board but you meant to the tcon.
I dont think you can without an oscilloscope. You can test voltages on the tcon
but that will have to wait until you get a fuse.

[aortiz]

Re: dell 2007 WFPb monitor ,no lights

i have got me another monitor to keep me going,i had to return my sons monitor.
i am going to send for a logic board for this monitor.
from the monitors i got i have one that keeps going off,by itself after a little while.
at first it did it like 3or 5 seconds later.
one thing i noticed was that if i change the display settings i got it to stay longer,(17 min was the longest) and then it goes off.
it comes back if i turn it off and on again.