EIZO FlexScan SX3031W - vertical lines artifacts

[bassfreak]

I have an EIZO FlexScan SX3031W lcd monitor which shows vertical lines artifacts (garbled/distortion pixels) around various parts of the displayed image, especially around white areas.

Artifacts show up even when no signal is present, on and to the right of OSD menus.

Opened it and nothing looks broken (no visible capacitors problem, all Nichicon, less than 5 years old).
Reconnected all cables (including t-con? flex cables)
Found that 4 capacitors on the PSU board are running a little warm, but they are rated 105'C.

Please see attached images.
I've uploaded more photos here: http://www.whatsinside.info/eizo-fle...031w-teardown/
Video here: http://youtu.be/o2o9cVHDTSQ

Anyone know where can be the problem ?
Found a similar pictured issue here: https://www.badcaps.net/forum/showthread.php?t=35751

Thanks!

[selldoor]

Re: EIZO FlexScan SX3031W - vertical lines artifacts

Ok not seen or worked on anything this big so general suggestions only

Capacitors should be ok the warm ones are next to a heatsink which will probably be heating them.
If you think it is over hot you could try a cooling fan to see if it makes any difference.

Do the artifacts display all the time from switch on to say half an hour.
Are the artifacts always in the same place.
What do you get if you unplug the lvds cable?

Looks like a tcon problem, again you could try cooling/heating to see if it makes any difference.
Very VERY carefully you could remove the tcon clean all the flat cables and reseat them.
You say you reconnected them already did that include the ones to the panel? did you clean them?
Is that component on the tcon with 2 legs and a stub a voltage regulator or a mosfet? Part number?

Was it your monitor - did it get gradually worse

There is an adjustment pot on the power supply - any idea what it adjusts. IF you get no improvement with anything else I would mark carefully where the adjuster is and move it very slightly to see if it it makes any difference - if not return it to its original position.

[bassfreak]

Re: EIZO FlexScan SX3031W - vertical lines artifacts

The 4 capacitors are barely warmer than others which are at ambient temperature.

I would say there are two kind of artifacts:
1- Artifacts that display from switch on permanently:
1.1-they appear as dim vertical lines over the displayed screen elements, a
1.2-they appear as proeminent white lines to the right white areas (dancing/flashing/ringing)
2- Artifacts that appear from switch on but amplify with more power-on time (heating)
2.1-A few vertical lines (2 to 5) at the leftmost of the screen, that are split in 5? vertical segments, composed of random RGB pixels dancing.
Please see them in the linked video, at around 0:11.

I will try to disconnect the LVDS cable and wiggle it while working to see what happens.

I reseated all the 4 wide flex cables at the top of the T-CON, have not cleaned them because they looked very clean. Maybe I'll try rubbing them with an eraser and clean with isopropilic alcohol.
I wonder if they all contain the same set of signals, because if they do, then the problem would manifest only in a specifica area of the screen; but if for example, the first flex contain some signal grounds that are missing from the other cables, and that one is making poor contact, then it would be a possible location of the problem, else not.

That component, identified by D17 on the board, is imprinted: [Fairchild logo] F30, Y0504, SA. From my search it is a Schottky Barrier Rectifier (FYD0504SA)

The problem appeared suddenly while in use, no physical shock, maybe a power surge or bad internal cooling?! The fan (that cools the T-CON) runs permanently, starting from the first few seconds from power on (don't know if this is normal, it was not mine until it had the problem).

The pot on the PSU board says "ADJ 390V", no idea what about it.. I may try a slight adjust on it also.

Thank you!

[bammbammfran]

Re: EIZO FlexScan SX3031W - vertical lines artifacts

That fan looks like it is there to pull some extra heat out or add cool airs in
But, that probably only allowed the altera to last as long as it did. They usually fail in 1-2years
So, that altera chip is probably what your issue is.
I have redone over 150 of these damn boards.
That board is no longer made. Samsung stopped making is a few years ago. So the only option is to remove the chip and reintall it with new solder balls.
I do not recommend reflowing, but that may get it back up for a while

[bassfreak]

Re: EIZO FlexScan SX3031W - vertical lines artifacts

Wow! Straight to the point, seems it is the same TCON as in the Samsung 305T.
Found this https://www.badcaps.net/forum/showth...t=10164&page=3, and it looks similar to my problem.

I'll take the TCON to a reflow specialist and see what is the result.
Thank you all for helping out! I will come back with the results.

[bassfreak]

Re: EIZO FlexScan SX3031W - vertical lines artifacts

Good new!
Professionaly reballed today and seems to work.

Did not had time to comprehensively test it, but at least the OSD looks clear, no artifacts, no left side vertical lines artifacts.

One success story, a knowledge stone added and a remarkable display saved from going to trash bin.

One notice is that the chip is very hard to reball, because of the attached heat spreader. The balls just don't melt to the pads on the dark infrared station and had to be reworked out with the hot air gun three times.

All your advices were very helpful in diagnosing the problem.
Thanks again for helping out!

[Dave_@repairchannel]

Hi all,

Thank you so much for posting this. Based on these posts I was able to fix two flexscan monitors. I made a youtube video
showing the whole repair process. If you want to check it out, you can find it at: https://www.youtube.com/watch?v=7pKXCZO7OrY

Hope this helps keeping more of these wonderful monitors running...

Best regards,
Dave.