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I'm looking for the schematic for Samsung S27B970D monitor

I'm looking for the schematic for Samsung S27B970D monitor

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I am not aware of any schematics available for these outside of Samsung itself. What is the problem? Perhaps a schematic is not really needed.

Please post as many details of the problem as possible along with pictures if that will help.

Thanks,

Dan

da

The original problem was intermittently, the monitor would cycle thru a set of test patterns (Red, Blue, Green, Grey, White, Color Bars, etc). At first I thought my computer was infected because this happened soon after I click on some link someone sent me. But the problem persists even after I unplugged the video cable and it got worst. So I did some googling and find out that some panels will cycle thru test patterns if the video signal is missing. The B970's main board (where the video input connections are) is on the bottom of the base and there're one set of cables connecting the main board with the touch control panel (menu, brightness, etc) and two ribbon data cables connecting the main board and the panel routed thru the neck. The panel itself is height adjustable so I figured as the panel is raised or lowered, it must be putting some stress on the ribbon cable connections at the panel.

da

So I figured this must have been the problem. So I played around with raising and lower the panel and also moving the panel around trying to get to the ribbon connections at the panel. The dumb thing I did was I was doing all this while the bottom of the base cover was removed and with the main board dangling freely. As I was messing with panel, the display as well as the touch control panel's back light got shut off all of a sudden. So I must have short out the main board some how.

There's a big power MOSFET on the main board that must be what switches on the power to the panel and the touch sensitive control panels. There's 14V at the Drain and 0V at the Gate and Source. The gate is connected to a DIP IC with no markings on it. I'm thinking the Gate is probably ultimately controlled by the main MCU because you don't want the panel to come on unless the main MCU is up and ready. So at this point, I think I'm screwed.

da

Anyone want's buy a dead B970? The panel is probably still good. The screen is in good condition clean no markings.

But Samsung really screwed up the design for this B970. I mean who would design the ribbon cable to be moved around when the panel is raised and lowered? Bummer.

da

You Wish post some pictures of your board etc. with yor question. that way we can see what you see Adding images to an existing question

da

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You Wish try connecting by another means . Can you connect with an hdmi cable or dvi or vga . Have you tried attaching it to a different computer . Have you tried static discharge . Unplug the monitor and drain any residual power by holding the power button down for 60 seconds . Then plug it back in and reboot the computer . Also try a hard reset . This is done by holding the power button down till the monitor shuts off continue holding till it powers back on . the whole cycle should take about a minute or slightly longer. Hope something here helps

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Thanks for chiming in.

The board has been unplugged for a few days now. Still no power.

There's only DVI, HDMI, and DP on this monitor. Initially, I tried DVI and HDMI and same problem. Test patterns flashing intermittently. I don't see how connecting different sources to different video inputs would help because if all the inputs are disconnecting, you should see a graphic indicating video input(s) are missing. As a matter of fact, Samsung calls this Self Test Mode: disconnect all inputs and if you see that graphic, then your monitor is working. On mind, if I disconnect all inputs, then that graphics shows up intermixing with the test patterns. So I think the video signal connection at the panel must be loose.

da

When I said the video signal connection, I do not mean the HDMI cable, the DVI cable nor the DP cable. So the main board converts the DVI, HDMI, DP signals into the raw digital signals needed to drive the raw panel. There're two ribbon cables connecting between the main board and the raw panel behind the screen. One of the ribbon supplies power only and the other one supplies the raw digital signals for the panel. If power is applied to the panel but the digital signal is missing, then it will flash the test patterns. So the digital signal ribbon connection at the panel must be loose. Or the FPGA got fried.

da

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Since a repair is likely not an option, try replacing the main board. You can find one here:

https://www.ebay.com/itm/SAMSUNG-S27E510...

Its worth the $15 to try and fix this, I think.

Dan

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Sorry I guess I post in the wrong thread. This is for the S27B970D model. I couldn't find a thread for it so I just pick this Samsung thread to ask my questions.

Unfortunately, I couldn't find any boards for the S27B970D anywhere. Don't want to go to Samsung 'cause it will be stupid expensive.

da

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