Dell 2407 Ghosting and Color Problems

[samsagaz]

Hey, after 2 years of use my dell 24" model 2407WFP start show me ghosting problem, so i purchased a new monitor and stop using the old one. A few months ago i start using the old one and after a few uses now the colors are very very bad.

I open it and checked caps, and looks all OK.

Is possible to start fail the chip FLI5962?

I try to find a main board to purchase without luck :/

Show some pics of the error of the LCD!





something to recommend me to check?

[samsagaz]

Re: Dell 2407 Ghosting and Color Problems

will try to change the 4H.L2K01.A03 board from my Monitor. but not easy to find it, At least found some sellers in china that have it in hiswebsites.

btw, someone know if my LCD have 4H.L2K01.A03 can i use A04 A05 or A06 revision? Will get some improvement using higher version?

[samsagaz]

Re: Dell 2407 Ghosting and Color Problems

Some updates... looks like the problem of the color are when are combined, for example i tried blue, red, green backgrounds and looks OK. but when are combined looks very bad!

When dark background and white letters display very bad too.

Tried to rework the chip with the hot station and(40seconds at 400° nothing changed)

Changing the board willl fix that issues?

[samsagaz]

Re: Dell 2407 Ghosting and Color Problems

changed 4H.L2K01.A03 board and still same problem (or worst)




is possible that will be the PSU Fault?

[boyebaran]

Re: Dell 2407 Ghosting and Color Problems

hi
please check lcd flat cable.bcs you changed panel same problem
may take a clear picture of T-con board?your picture is negative.

[samsagaz]

Re: Dell 2407 Ghosting and Color Problems

hi
please check lcd flat cable.bcs you changed panel same problem
may take a clear picture of T-con board?your picture is negative.

Yes ., changed Main Board instead TCon one, will take some picture today (need to dissasemble again).

Btw, i will try to purchase a new T-Con board i see that some ICs was overheat because same ics looks diferents in the same board, for example printing letters, in some are cleaned out

Will send a picture later!

[Th3_uN1Qu3]

Re: Dell 2407 Ghosting and Color Problems

Yes it looks like a T-CON board problem. Main board should be fine. You already found that out by now, as a new main gives the same pictures.

[Davi.p]

Re: Dell 2407 Ghosting and Color Problems

Seems the common gamma buffer chip problem, write here the marking of the little chips of more than 8 pins (seems are 2).. or check them for datasheet, if them are multi buffers, check that them are not programmable ics, if them are you have to change tcon, if not you can change only the chip..

[ivanpua]

Re: Dell 2407 Ghosting and Color Problems

Hola Samsagaz, tengo exactamente el mismo monitor con exactamente el mismo problema, pudiste resolverlo? cambie capacitores y nada, la main no encuntro quien envie a la Argentina pero tampoco estoy seguro que se resuelva cambiandola.

Espero que veas este mensaje y por favor me respondas, te voy a agradecer cualquier info.
GRACIAS!

[ivanpua]

Re: Dell 2407 Ghosting and Color Problems

Ahí leí que cambiaste main y no resolvió el problema de los colores, supiste algo más?

[ivanpua]

Re: Dell 2407 Ghosting and Color Problems

here is the solution

if the panel is an AU Optronics the tcon model is M240Uw01 - 05M16-1d

you can replace that board or try to repair it replacing this ics: As15-f

Pics attached

[petehall347]

Re: Dell 2407 Ghosting and Color Problems

gamma chip
try freezing it and see if pic gets better .

[televizora]

Re: Dell 2407 Ghosting and Color Problems

I've seen such a behavior on a Philips monitor, because of a voltage regulator feeding the control IC/microprocessor/ on the control board. Check for this. It could be a quick fix.