Odyssey G7 - Screen stuck on black and OSD Menu does not show.

[bawb88]

I just bought this maybe a month ago, so it has the newest firmware (I double checked after setting it up).  My pc went into sleep mode earlier but when I turned it back on nothing shows up at all. Just a black screen. Even pressing the menu joystick fails to get the OSD menu to show. I can turn the monitor off and on though.

Technically this happened twice now, the first time I was able to get it to come back after unplugging the power source from the monitor. But after a second time of going to sleep and turning my computer back on again, its back to all black. I've tried all manner of combination of unplugging power source and input source to no avail. I even tried the DP and HDMI wires on a different laptop and different monitor. They work fine, so its not the wires. I even tried the G7 on another laptop and still same black screen issue.

A couple times, the screen started to flicker back on to show my desktop but that never lasted more than .5 seconds. It did happen a few times. One "series" of flickers seemed to happen when I was messing with the power cord.

I'm not sure what to do at this point, I've even rebooted in safe mode and restarted, shut the computer down for a bit and turned it back on. But nothing. Everything else is fine, even the laptop recognizes that the G7 is plugged in and has it listed as one of the active monitors (I run a dual monitor set up, the G7 and a Lenovo, plus the laptop screen. Though generally I close the laptop lid and that screen is off).

[nadrojorge]

Same issue.

Calling Samsung support was such a waste. I tried so hard to talk to a technician about the problem, but they said they will have one call me back and all they did is setup a $200 visit that I had to cancel three times. Kept having to explain the issue and the last time I called in they just hung up.

From what I have gathered from the web, it is an overheating issue. I'm going to open the g9 up and hopefully cutoff the track that tells the monitor its overheating. 

Almost 2 grand for 3 years of service. 

[Sapulidi]

Hi! I solved my black screen (backlight functional but no display output)! It would turn on the display and I would see a weird flash in the corners but no display output. I only replaced it with a new monitor and it has been eating dust for a bit. But it surely worked before I put it away for a couple of months.

For instructions google this (Manualslib): "Disassembly And Reassemble; Disassembly - Samsung Odyssey G7 LC27G7 T Series Service Manual".

Note: You might want to try the part marked with *, below, first before you open up the mainboard.

I opened up the monitor (this is easier than it looks (page 27 Disassembly), be careful and make sure it's not powered on) and cleaned the mainboard with some electronics spray. This didn't not solve the issue but it was open anyway.

I reapplied the thermal paste on the chip and a different part that had paste on it. It was rock hard. I just used some CPU/GPU cooling paste there. I put everything back together but had the back panel removed and turned it on. No difference.

* This is what did the job, but at your own risk: I took out the display cable and cleaned that too + the connector on the mainboard (page Board connection CN1401), it's the big flat cable and put it back and firmly pushed it in, resulting in an image. I pressed on it some more to see if I could get a stable image and it did! Then I closed the cap to secure the cable.

So it might be a combination of things or just that cable somehow not making proper contact anymore.

Mine was out of warranty and I've done stuff like this often, so if you're not comfortable doing any of the above, please don't.

[Kate_0129]

Hello everyone. I'm experiencing the same issue right now and I'm at a loss. I can't access the menu  for a firmware update since the screen is totally black so the onscreen menu can't be seen.

Repairman is Samsungs answer to this but I guess i wanted to know how long it took and and how your experiences went? Fees, warranties, duration, etc. I basically only have one monitor and reason I'm asking those is to see if I would need to get myself a new monitor in the meantime for work.

Thanks in advance ☺️ 

[Members_ebtddGV]

You are an absolute legend. Taking out the display cable and reconnecting fixed it for me. It seemed to be wedged stuck so I suspect that the connection deteriorated over time. Works like new now.

For anyone else suffering this issue I was able to leave the monitor on (with nothing displaying) for about 20 mins, after which I could cycle power and it would work fine until it was turned off. Not sure if it needed to warm up to loosen the connection or something. If you can I would send this product back ASAP if you are under warranty to avoid having to take it apart, unfortunately I wasn't so lucky.

[Greifpad]

Thanks Sapulidi! I have a different model Samsung Monitor (S27H850QFU) which was having the same problems mentioned here. Monitor power on, LED on but the screen stays blank (backlight is on). The OSD also did not appear.  Switching inputs makes not difference.

Solution that worked for me:

1) remove all cables from the monitor

2) take off the stand if it has one.

3) Remove the back cover of the monitor.  My monitor had no screws to remove. Only plastic clips that are hidden.

- you do need to have plastic tools (like those used for repairing mobile phones) to gently prise the backcover away from the bezel.

- as soon as about two clips are released then it is quite easy to finish removing the cover. Go slowly.  Keep the angle low to avoid snapping the back cover.

- once the cover is removed in the center you can use the metal housing which contains the control board etc. etc.

- on the lower left corner near the power switch there are two ribbon connectors which look like they are held in with sellotape. 

- It is these ribbon cable connections that are causing the problem.

-  The heavy metal housing of the control board was barely held in place by some blobs of glue at the corners. As soon as i picked up the monitor the metal control board housing moved.

- Diagnosis.

Bad design means that the metal housing inside is not securely fixed. If you suddenly lift up or put down the monitor this could put stress on those ribbon cable connectors. They only need to move a little to interrupt the contact.

Fix:

Remove the sellotape covering the ribbon connectors and gently push the ribbon cable plug firmly into the socket.  Be careful not to bend anything. Put the sellotape back. Check for any dust buildup inside the housing and remove it.

Make sure to test the monitor before putting the backcover back on. You really dont want to do that twice if you dont have to!

- Replace the cover: This is easy. Lay it down carefully and make sure it is lined up. Start at the corner near the power switch and work your way around, gently pushing the cover down until there is a loud satisfying click.

Thats it!

Samsung should just address this problem with some improved quality control instead making people send their monitors in for repair.

Note: You do need to have some experience taking consumer electronics apart.  If you are comfortable taking a a mobile phone apart then I would not try this.

Good Luck!

[Greifpad]

EDIT*

Note: You do need to have some experience taking consumer electronics apart. If you are NOT comfortable taking a mobile phone apart then I would not try this.

[itissaman]

This is what happened to me as well. the guy for the support basically hanged up on me...

[itissaman]

 :((. All of my gadgets are Samsung, but from now on, I will never buy a Samsung again!