Samsung S27C750P LED Backlit LCD. No image, black bar in screen (blinking on/off)

[Phalanx1422]

Hello friends! I am hoping this is the correct forum to post this in.

I have a two year old Samsung S27C750P LED back lit LCD monitor that I found dead after returning from a trip recently (there were no prior gradually worsening symptoms).
Model code: LS27C750PS/ZA
(http://www.newegg.com/Product/Produc...82E16824001963)

The current state of the monitor is as follows:
Black image with a black bar down the middle.
No display of any menu items, etc.
The monitor is still recognized by the PC.

I disassembled the monitor expecting to see some blown capacitors like on an older Viewsonic monitor I repaired years ago, the PCB is far more complex than what I was expecting. I have taken some pictures of the PCB as well as the monitor that I will post.

I have a basic soldering iron kit and will be receiving the following (cheap) multimeter in a couple days
(https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1)

I would love to be able to tackle this as a fun project, however I am a little hesitant after seeing the PCB. Should it be too complex or if I am completely out of my element I won't mind scrapping the project, but may as well have a go at it if possible. Any input or direction to go in (even if it is to abandon the project) would be great.

I appreciate the time and answers of anyone who wants to give me feedback or suggestions on this. Again, I hope this is the correct forum. Thank you.

[budm]

Re: Samsung S27C750P LED Backlit LCD. No image, black bar in screen (blinking on/off)

At least the backlights are working.
https://www.badcaps.net/forum/attach...0&d=1475026313
What DCV do you have on all the pin of IC401, we also need the P/N as printed on the top of the IC.
Also need the pictures of the back side of the LCD panel.

[Phalanx1422]

Re: Samsung S27C750P LED Backlit LCD. No image, black bar in screen (blinking on/off)

At least the backlights are working.
https://www.badcaps.net/forum/attach...0&d=1475026313
What DCV do you have on all the pin of IC401, we also need the P/N as printed on the top of the IC.
Also need the pictures of the back side of the LCD panel.

Thanks for posting! I will be getting a multimeter delivered in 2 days. I will post an update with additional pictures tomorrow and will check pins as soon as I can.

Edit: You are looking for the Product number printed on the Integrated Circuit correct?

[budm]

Re: Samsung S27C750P LED Backlit LCD. No image, black bar in screen (blinking on/off)

Thanks for posting! I will be getting a multimeter delivered in 2 days. I will post an update with additional pictures tomorrow and will check pins as soon as I can.

Edit: You are looking for the Product number printed on the Integrated Circuit correct?

Yes, there should be something printed on top of that IC so we can look up the spec to find out if what I think it is for.

[Phalanx1422]

Re: Samsung S27C750P LED Backlit LCD. No image, black bar in screen (blinking on/off)

Yes, there should be something printed on top of that IC so we can look up the spec to find out if what I think it is for.

I received my multi meter over the weekend and took some readings with the help of my roommate. I spent a bit of time on google learning about IC chip numbering and looking at some generic pin outs. I took the readings using Pin 1 as Ground so please correct me if I was wrong in that, I am more than happy to measure it again.

The product numbers for IC401 were a bit difficult to discern but I believe read as follows:

CE1408
25040BSIG
CEAK0C

The DCV pin readouts for IC401 were as follows

Pin 1 Ground (?)
Pin 2 Ranged between 0.09 and 0.11 (averaged about 0.10)
Pin 3 -.05
Pin 4 -.05
Pin 5 -.05
Pin 6 -0.5
Pin 7 3.25
Pin 8 3.25

I have attached images of the back of the monitor, please let me know if there is further disassembly required. Once again, I appreciate any and all feedback, suggestions, and assistance. If I messed up on any of the steps please let me know and I would be happy to correct it. Learning about everything is half the fun.

[budm]

Re: Samsung S27C750P LED Backlit LCD. No image, black bar in screen (blinking on/off)

OK, that IC is not what I thought what it is.
I need to do more board tracing to find out how the panel gets the Voltage to run the T-CON.

[Phalanx1422]

Re: Samsung S27C750P LED Backlit LCD. No image, black bar in screen (blinking on/off)

OK, that IC is not what I thought what it is.
I need to do more board tracing to find out how the panel gets the Voltage to run the T-CON.

Thank you for your time!