Dell 2005fpw

[Spyder45]

Hey guys, I have this 2005fpw it powers on and the power lights stay on. It says there is no input. I have tried it on other pcs with other cables and still nothing. I took it apart and found a few burn marks on the circuit board and the back of the display. the two burn marks on the back of the display are from contacts from this board.. but it didnt burn the board in those spots but there was some black stuff on those contacts.. the burn on the ciruit board is under the discolored piece.. I dont know what they are? theres 6 of them Could this be fixed?

[retiredcaps]

Re: Dell 2005fpw

1) Post a picture of the logic/main board (where the DVI/VGA inputs are).

2) Do you have a multimeter?

[Spyder45]

Re: Dell 2005fpw

I do have a multimeter. I should have mentioned that it went black all of a sudden.. it had turned off before and all i had to do was reboot the monitor. it never really rolled or flickered though

[retiredcaps]

Re: Dell 2005fpw

it had turned off before and all i had to do was reboot the monitor. it never really rolled or flickered though

So I'm confused. Is the monitor working then after a reboot?

[Spyder45]

Re: Dell 2005fpw

No, it stopped working all together now.. the reboot helped on previous times that it had gone blank. All it does now is power the lights on.

[retiredcaps]

Re: Dell 2005fpw

Okay, the pic is a bit blurry, but I count 6 voltage regulators.

1) Put your multimeter on 20 V DC if manual range.

2) Put your black probe on a ground screw (any one on the logic board will do fine).

3) Put your red probe on each voltage regulator pin EXCEPT the big fat tab. If the middle pin is "cut" and not touching the board, we want to measure that pin as well.

4) Report the part number for each regulator.

5) Report all your findings like the following example,

U101 - part number AL1117-33 - pin 1 = 0.00 V, pin 2 = 3.3 V, pin 3 = 5.0 V

6) Post a picture of the entire power/inverter board (not cropped like in post #1)

[retiredcaps]

Re: Dell 2005fpw

All it does now is power the lights on.

Is the screen all white?

If yes, that multicolored connector on the logic board connects to a panel board. The panel board runs the entire length of top of the monitor. There may be an open fuse on that panel board. A good fuse should measure less than 1.0 Ohms.

Alternatively, that connection or cable could be loose and need cleaning or reseating.

[Spyder45]

Re: Dell 2005fpw

It would always go black.. never saw it go white. how are these pics? i'm checkin those pins now.. thanks for the help so far!

[retiredcaps]

Re: Dell 2005fpw

Forgot to upload the pic of the voltage regulators circled in red.

[retiredcaps]

Re: Dell 2005fpw

On the power board, there is a CON201 (the connector). It has a legend.

Measure all the DC voltages and report it like the following.

pin 1 - legend says 12V - recorded reading = 11.99 V
pin 2 - legend says 5V - recorded reading = 5.01 V

[Spyder45]

Re: Dell 2005fpw

U506 - EF3AD 1117AS33 - pin 1 = 0.00 V, pin 2 = 0.00 V, pin 3 = 121.6 mV
U605 - DF3AD 1117AS25 - pin 1 = 0.00 V, pin 2 = 2.47 V, pin 3 = 4.67 V
U606 - BA033 57 92 - pin 1 = 4.95 V, pin 2 = 10 mV, pin 3 = 3.32 V
U607 - DF4AD 1117AS18 - pin 1 = 0.00 V, pin 2 = 1.76 V, pin 3 = 3.30 V
U608 - BA033 57 92 - pin 1 = 4.67 V, pin 2 = 15 mV, pin 3 = 3.31 V
U610 - EF3Ad 1117AS33 - pin 1 = 0.00 V, pin 2 = 3.25 V, pin 3 = 4.94 V



pin 1 - 12v = 11.7 V
pin 2 - 12v = 11.7 V
pin 3 - gnd = 0
pin 4 - gnd = 0
pin 5 - 5v = 4.57 V
pin 6 - 5v = 4.97 V
pin 7 - gnd = 0
pin 8 - 5v = 4.97 V
pin 9 - on/off = 2.80 V
pin 10 - ready = 600 mV
pin 11 - dimm = 170 mV

[jetadm123]

Re: Dell 2005fpw

U506 - EF3AD 1117AS33 - pin 1 = 0.00 V, pin 2 = 0.00 V, pin 3 = 121.6 mV
U605 - DF3AD 1117AS25 - pin 1 = 0.00 V, pin 2 = 2.47 V, pin 3 = 4.67 V
U606 - BA033 57 92 - pin 1 = 4.95 V, pin 2 = 10 mV, pin 3 = 3.32 V
U607 - DF4AD 1117AS18 - pin 1 = 0.00 V, pin 2 = 1.76 V, pin 3 = 3.30 V
U608 - BA033 57 92 - pin 1 = 4.67 V, pin 2 = 15 mV, pin 3 = 3.31 V
U610 - EF3Ad 1117AS33 - pin 1 = 0.00 V, pin 2 = 3.25 V, pin 3 = 4.94 V



pin 1 - 12v = 11.7 V
pin 2 - 12v = 11.7 V
pin 3 - gnd = 0
pin 4 - gnd = 0
pin 5 - 5v = 4.57 V
pin 6 - 5v = 4.97 V
pin 7 - gnd = 0
pin 8 - 5v = 4.97 V
pin 9 - on/off = 2.80 V
pin 10 - ready = 600 mV
pin 11 - dimm = 170 mV

Definitely an issue with U506. Pin 2 (output) should be about 3.3V and Pin 3 (input voltage) approx. 4.67 V. See what's connected to pin 3. Check for a fuse or solder bridge (from soldering the new caps). Also, check to make sure you soldered the polarity of the caps correctly.

[Spyder45]

Re: Dell 2005fpw

No caps have been replaced. I did find this discolored wire too.. Is there anything else I should check? I've had to repair the ribbon that goes to the buttons on the the front.. it ripped when i took the face off.. Would that mess up any of the readings?

[trebo]

Re: Dell 2005fpw

wow that transformer looks bad

[jetadm123]

Re: Dell 2005fpw

I agree with trebo, that 1 transformer looks fried.

[Spyder45]

Re: Dell 2005fpw

Do I replace it and see what happens from there? Is there something else I could be checking? Am I at the right forum?

[Rtech]

Re: Dell 2005fpw

Its the best Monitor Forum on the internet !!

[trebo]

Re: Dell 2005fpw

Do I replace it and see what happens from there? Is there something else I could be checking? Am I at the right forum?

yes you are in the right forum, and the best forum
yes it will need replacing
yes there are things you can check, but I leave all that to the others who are already helping you
we should have seen that transformer in your first post LOL,
so I went back over your pictures and saw this, and it dont look right
needs checking out

[Spyder45]

Re: Dell 2005fpw

The resistance of that resistor is in spec, and the solder joints are good.

[Spyder45]

Re: Dell 2005fpw

Any other suggestions guys?