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G40 Screen replacement

R30/R40, A30/A31, G40/G50 and Z60/Z61 Series. NOT for AMD-Ryzen.
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cchisholm
Posts: 11
Joined: Fri Mar 08, 2019 9:10 pm

G40 Screen replacement

#1 Post by cchisholm » Thu Jan 21, 2021 6:09 am

I recently picked up a G40 for fairly cheap, besides needing a new keyboard its working fine, I installed an IDE ssd and got lubuntu 12.04 and XP running well on it. The issue is that the screen is flickering slightly and is showing those edge age patterns like a lot of my older thinkpads ive had from the 90's show
You know like the FRSTN 380ED's that seem to get almost mushy looking? Same issue

So I want to find a replacement display, but I also figure it may be worth trying to upgrade the display. How feasible is it to swap to a 1400x1050 15" G41 display? Or does that require the fx 5200 go? Does anyone know of any screen replacements or upgrades if possible that work with the G40?
Im not against some connection modding, I know it uses a weird video cable but im sure that could be adapted somehow.

Or if anyone knows at least how to get the backlight to not flicker, I already fiddled with all the connections and theyre solid and clean.
Laptops in general: Thinkpad P50, Thinkpad S30, Thinkpad X1 Nano, Thinkpad X220, Thinkpad T43p, Thinkpad 380ED, Micron Transport XPE, 2015 MacBook Pro

Screamer
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Posts: 585
Joined: Sun Apr 15, 2018 7:15 am

Re: G40 Screen replacement

#2 Post by Screamer » Thu Jan 21, 2021 8:34 am

cchisholm wrote:
Thu Jan 21, 2021 6:09 am
How feasible is it to swap to a 1400x1050 15" G41 display?
That would heavily depend on your budget.
cchisholm wrote:
Thu Jan 21, 2021 6:09 am
Or does that require the fx 5200 go?
It does not. Some factory G40 configurations came with a 1400x1050 panel.

All you need is a G40/G41 SXGA+ (1400x1050) cable, otherwise all 1400x1050 panels will not function. If you can't locate that cable, stick with the 1024x768 panels.
cchisholm wrote:
Thu Jan 21, 2021 6:09 am
Does anyone know of any screen replacements or upgrades if possible that work with the G40? Im not against some connection modding, I know it uses a weird video cable but im sure that could be adapted somehow.
I'm not exactly sure which panels work and which don't. However, I do know that they should be a 30-pin FPD-Link based panel. Not all of them would work though, as their pin-outs and the connector's position itself can vary.

I suggest asking wujstefan via a personal message regarding panel compatibility. He has the entire ThinkPad G series (G40, G41, and the G50), so I'm sure he must have tried a bunch of display panels on them.
cchisholm wrote:
Thu Jan 21, 2021 6:09 am
Or if anyone knows at least how to get the backlight to not flicker, I already fiddled with all the connections and theyre solid and clean.
Either the inverter is failing or the display panel's CCFL backlight is failing.

Is there a red or a pink hue on the display panel? If there is such a hue, that would be the CCFL's problem. You would be looking at a CCFL replacement in that case, which isn't easy to do.

Hacker117
Posts: 11
Joined: Wed Sep 18, 2019 11:31 pm
Location: Milton, Canada

Re: G40 Screen replacement

#3 Post by Hacker117 » Thu Jan 28, 2021 9:29 pm

I have the classic IBM ThinkPad G40 with 3 GHz P4 single core CPU and 2 GB RAM ... replaced the incumbent Hitachi 4200 rpm hdd with a 7200 rpm Hitachi hdd which improved performance ... bought the thing new in 2004 ... runs 32 bit antiX 19.3 full version very well. Opens webpages in Firefox fairly quickly and will play most YouTube videos and DVD movie with VLC. The screen is still in great shape. I don’t think the machine has had 100 hours of use all told. Does amazingly well for a 17 year old laptop.

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