40UB800V issue, No signal on 4k with Samsung UBD-M7500

Discussion in 'LG TVs Forum' started by sqweerl, Jul 18, 2018.

  1. sqweerl

    sqweerl
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    Hello all! I'm having real issues with an LG 4k TV (40UB800V) and wondering if I could get a second opinion.
    Basically, I just bought a Samsung 4k Blu Ray player (UBD-M7500) to play UHD discs on the TV and actually benefit from it being a 4k TV. However in the settings of the blu ray player as soon as you change the res to 2160p the TV screen goes black and says "no signal" then of course a few seconds later it reverts back to regular 1080p.
    Tried with 4 or 5 completely different HDMI cables, including a brand new one from Currys, in all the different ports. Our regular blu ray player works fine over hdmi (in all the ports, too).

    When I plug the PC in over HDMI I can wack the resolution all the up to 4k (2160) just fine. No signal issue.

    I think I'm answering my own question but is this just the case that the TV is not compatible with this 4k player; as I read on the LG website it warns

    "Some devices may have compatibility issues, such as some of the new 4K Blu-ray Players connected to our 4KTVs. It's possible the HDMI HDCP Handshake may be timing out (rare, but it could happen)"

    is that this issue??
    I am so dissapointed with this TV. The YouTube App is locked at 720p, the menu isn't at all customiseable and now when we get around to actually wanting to use a 4k player with it, it's incapable of doing even that.

    Or, am I missing something? I read online that I could buy a splitter which would strip the HDCP, but my understanding is that because its 4k the strippers don't support [email protected] 30hz? does this make a difference?

    Help! Perhaps we should just sell it and buy a new 4K TV that isn't rubbish!?
     
  2. Dodgexander

    Dodgexander
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    It may be possible that only 1 of the ports is hdcp 2.2 but it's hard to know.

    There may also be a toggle in the TV's option to increase the HDMI bandwidth.

    You could use your computer to dump the edid of the TV. If your on win10 there's an easy way to get the info you need. With only the TV enabled as the computer monitor just run dxdiag and export the info to a text file. It should give you important info about the capabilities of the TV.

    Just gotta make sure you use the right HDMI port. I'm not sure all of them will be hdcp 2.2 but you could always do it with all ports to compare.
     
  3. sqweerl

    sqweerl
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    Well, now I'm confused and concerned.

    DXDiag:

    ---------------
    Display Devices
    ---------------
    Card name: NVIDIA GeForce GTX 970
    Manufacturer: NVIDIA
    Chip type: GeForce GTX 970
    DAC type: Integrated RAMDAC
    Device Key: Enum\PCI\VEN_10DE&DEV_13C2&SUBSYS_31601462&REV_A1
    Display Memory: 4095 MB
    Dedicated Memory: 3072 MB
    Shared Memory: 1023 MB
    Current Mode: 4096 x 2160 (32 bit) (24Hz)
    Monitor Name: Generic PnP Monitor
    Monitor Model: LG TV
    Monitor Id: GSM0001
    Native Mode: 1920 x 1080(p) (60.000Hz)
    Output Type: HDMI
    Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
    Driver File Version: 24.21.0013.9836 (English)
    Driver Version: 24.21.13.9836
    DDI Version: 11
    Driver Model: WDDM 1.1
    Driver Attributes: Final Retail
    Driver Date/Size: 6/25/2018 18:26:02, 19083216 bytes
    WHQL Logo'd: n/a
    WHQL Date Stamp: n/a
    Device Identifier: {D7B71E3E-5082-11CF-BE51-6D111BC2D535}
    Vendor ID: 0x10DE
    Device ID: 0x13C2
    SubSys ID: 0x31601462
    Revision ID: 0x00A1


    And then I ran DumpEDID, just for laughs and got this:

    Registry Key : DISPLAY\GSM5ABB\5&1f455c9e&0&UID2097425
    Monitor Name : LG FULL HD
    Manufacture Week : 1 / 2014
    ManufacturerID : 27934 (0x6D1E)
    ProductID : 23227 (0x5ABB)
    Serial Number (Numeric) : ** (0x01010101)
    EDID Version : 1.3
    Display Gamma : 2.20
    Vertical Frequency : 56 - 75 Hz
    Horizontal Frequency : 30 - 83 KHz
    Maximum Image Size : 48 X 27 cm (21.7 Inch)
    Maximum Resolution : 1920 X 1080
    Support Standby Mode : Yes
    Support Suspend Mode : Yes
    Support Low-Power Mode : Yes
    Support Default GTF : No
    Digital : Yes

    Supported Display Modes :
    720 X 400 70 Hz
    640 X 480 60 Hz
    640 X 480 75 Hz
    800 X 600 60 Hz
    800 X 600 75 Hz
    1024 X 768 60 Hz
    1024 X 768 75 Hz
    1280 X 720 60 Hz
    1152 X 864 75 Hz
    1280 X 800 60 Hz
    1440 X 900 60 Hz
    1280 X 1024 60 Hz
    1280 X 1024 75 Hz
    1600 X 900 60 Hz
    1400 X 1050 60 Hz
    1680 X 1050 60 Hz
    1920 X 1080 60 Hz

    ----------------------------------------------
    But it says UHD on the TV....the site says it's UHD....I can switch the resolution to 2160...and play games on the TV in 4k too.
     
  4. sqweerl

    sqweerl
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    this capping at 1920 I'm wondering if that's just showing modes that are native to my graphics card rather than the TV.
     
  5. sqweerl

    sqweerl
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    I Fixed it!!!!
    I changed the colourspace from 4:4:4...to 4:4:2
    then change the res from Auto...to 2160p

    BAM! Ohhh my god, I'm so happy now. Haha!
     

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