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Help upgrading Thinkpad T490 panel (kbin.social)

submitted 1 year ago by [email protected] to c/[email protected]

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Ok, I'm a bit of a noob when it comes to hardware stuff. I have a Thinkpad T490 with the 1920x1080 non-touch screen. My complaint is that I ended up with the model with only 45% NTSC. I would like to upgrade to something with 72%.

AFAICT, my screen's model # is N140HCA-EAC. 30-pin connector. Is this - https://www.laptopscreen.com/English/model/Lenovo/FRU~01YN154/ compatible?

I already know there's no blocks or whatever in the bios preventing an upgrade, just want to make sure I buy the right thing. Would rather not ship from China so NA sellers are good.

(btw I obtained the model of what I have now by running "edid-decode </sys/class/drm/card0-eDP-1/edid", I'm on Linux)

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[–] [email protected] 0 points 1 year ago (1 children)

Yeah as for the original screen, I can't seem to identify the revision.

edid-decode </sys/class/drm/card0-eDP-1/edid
edid-decode (hex):

00 ff ff ff ff ff ff 00 0d ae d4 14 00 00 00 00
24 1a 01 04 a5 1f 11 78 02 28 65 97 59 54 8e 27
1e 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 b4 3b 80 4a 71 38 34 40 50 3c
68 00 35 ad 10 00 00 18 00 00 00 fe 00 4e 31 34
30 48 43 41 2d 45 41 43 0a 20 00 00 00 fe 00 43
4d 4e 0a 20 20 20 20 20 20 20 20 20 00 00 00 fe
00 4e 31 34 30 48 43 41 2d 45 41 43 0a 20 00 05

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.4
  Vendor & Product Identification:
    Manufacturer: CMN
    Model: 5332
    Made in: week 36 of 2016
  Basic Display Parameters & Features:
    Digital display
    Bits per primary color channel: 8
    DisplayPort interface
    Maximum image size: 31 cm x 17 cm
    Gamma: 2.20
    Supported color formats: RGB 4:4:4
    First detailed timing includes the native pixel format and preferred refresh rate
  Color Characteristics:
    Red  : 0.5898, 0.3496
    Green: 0.3300, 0.5546
    Blue : 0.1533, 0.1191
    White: 0.3134, 0.3291
  Established Timings I & II: none
  Standard Timings: none
  Detailed Timing Descriptors:
    DTD 1:  1920x1080   60.008 Hz  16:9    67.929 kHz 152.840 MHz (309 mm x 173 mm)
                 Hfront   80 Hsync  60 Hback 190 Hpol N
                 Vfront    6 Vsync   8 Vback  38 Vpol N
    Alphanumeric Data String: 'N140HCA-EAC'
    Alphanumeric Data String: 'CMN'
    Alphanumeric Data String: 'N140HCA-EAC'
`

"CMN5332" doesn't appear in any searches on laptopscreen.

What you bought though, do you think that will fit my T90? I also don't know if I need brackets or tape and I've been giving myself a headache trying to figure all this out.

[–] [email protected] 1 points 1 year ago

Yes, I think so. I the T495 is - as far as I know - just the AMD version of the T490.

I think it's ok that you can't find the revision of your screen. Just check the different revisions on panelook. I suspect they'll match in dimensions and connector position. I Mena, they ought to, as they are the same model number, and the revision apparently is so unimportant that it doesn't get stated by the screen itself.