Why does the Quanta QD141F1LH01 panel work on a T60 and not T61?

[Robsa990]

I recently purchased a 14.1" T60 which I swapped out it's motherboard for a 42W7873 T61. It came with a defective XGA screen so I bought this Quanta panel for it.
I panicked a little when I saw a pixel-tight grid of white lines on the boot screen and when it booted into windows it just looked.....awfully unusable. I read this forum post viewtopic.php?f=29&t=131229&hilit=QD141F1LH01#p849315 by user HiFiGuy and he was using it on his T60p. I had a T60 sitting in semi-disassembly and tested it on the T60 board. It worked normally from the looks of it beside not being able to display the BIOS until HV expansion was turned off and then ofcourse noticing the white spots, but other than that it was working. Why is this?

Here's a link to some comparison pictures I took: https://drive.google.com/file/d/10UHNBP ... sp=sharing

[RealBlackStuff]

Not a T61 fault, but its nVidia NVS140M graphics are to blame.
Probably a motherboard from before 2008.

[Robsa990]

I thought about that too, the Nvidia graphics were working fine before the screen swap so I swapped them back to make sure I didn't break it or if it happened to die on me right then, but the old display still works. I'll just have to swap the T60 board back in and use it that way.

[p.art]

I have the same model of LCD (QD14FL07) modded with Monty's LED backlight in my ThinkPad with a T61 Intel GPU motherboard. It works, but I wouldn't call it perfect.

I get quite the same shadowing effect around the edges of the screen. Shadowing is not as strong as in yours, maybe a couple of centimeters from the edges. But I believe it fades a bit away, when the screen gets warm, when laptop is being used regularly for a week or two. Does not disappear completely, but becomes less noticeable then. May also be a placebo effect. Not sure, it is not my daily driver, so.

Mine does not behave like yours with regards to pixel-tight grid effect. But I have always had impression that it doesn't drive the pixels 100% right, something is a bit off. Like a light grain effect, something with sub-pixels or gamma. May also be that it's just an old LCD-tech, and it just works like that. But I have tested a couple of different LCD models in this laptop, and saw none of such effects.

I've decided to keep it, as the contrast ratio is noticeable better in comparison to other 14,1" SXGA+ LCDs of that era (but still low by today's standards). I do believe that problems discussed here may have something to do with EDID not being completely compatible with T61. I hope to find some free time someday to try to sort this out. Anyway, I wouldn't call this Quanta display a plug and play fit for T61.

PS. Monty's Daylight kit makes this LCD crazy bright. I get around 600 cd/m2 on max brightness setting (measured with i1Display Pro). No obvious rippling pattern from individual LEDs either.