08-26-2017 08:17 PM
Based on my own experience.
Guide for everyone who wants to replace/upgrade his Lenovo T450s or T450 screen.
IMHO it can be useful for Lenovo T460s or T460 and similar models.
I spend a lot of time to collect all this info. I hope it helps somebody!
And it worth to replace if you have TN screen now. LG to AUO - only if you really need little better colors.
1. You should be ready to lost hardware brightness control. Brightness set at max always. Some solutions possible - read the guide )
If you have replacement screen from manufacturer or "dead" laptop of the compatible model - you are lucky!
2. Sometimes you need to replace eDP cable. It cost additional money and require more skills and time.
3. Screens market is terrific. Everybody wants to sell you "same" screen at a high price.
You need carefully check seller if you want original AUO display or at least LG display.
1. Lenovo replaces the name of a screen in EDID (screen "BIOS"). For example "LG LP140WF3-SPD1" -> "Lenovo LP140WF3-SPD1".
2. Lenovo writes all changed names in EDID table in BIOS. If your screen name not in BIOS -> brightness always at maximum.
Brightness control (possible solutions):
1. Change BIOS EDID table to correct values. Change screen name in EDID. Require very special skills.
More info here: http://forum.notebookreview.com/threads/w550s-t550-lcd-screen-replacement-brightness-set-at-max.7741...
Users with "old" bios 1.04 - 1.19 (for T450s) reports that they can change brightness in BIOS or Linux.
I can't change brightness in BIOS for T450 and T450s.
I had 1.25 or 1.26 for T450s and same for T450 (updated at spring 2017). I tried to install old BIOS, but I saw some strange errors during downgrade, BIOS stay in the same version.
I decided to use software solution because don't want to brick my laptop )
The brightness control software solution does not save battery, but useful if you don't care about battery life time:
I use https://dimscreen.en.softonic.com/ v 1.1 for Windows 10 64bit Pro.
I bind "Alt +" and "Alt -" as global hotkeys instead of "Ctrl +-" because Ctrl used by all web browsers.
Hotkeys are not working some time: work around - Alt+Tab to another app or manual choice brightness level in the app tray.
You can use next regkey for auto start for all users:
[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run] "DimScreen"="\"C:\\Program Files (x86)\\DimScreen.exe\""
DimScreen doesn't change brightness. I think it adds some kind of transparent window over your desktop.
Some items like "Start menu", context menu or mouse pointer can not change brightness and always at max.
It is not useful in total darkness but ok for a normal work environment.
DimScreen issue: on a gray background, you can't see mouse caret on some special brightness level. Solution: change brightness )
If you replace fullHD or maybe 1600*900 screen, you don't need to care about eDP cable.
You already have eDP 2 lines cable.
If you have 1366*768 screen - maybe you have 1 line eDP cable. 1-2-4 lines - additional data lines for high data rate / screen resolution.
How to check your cable:
a) Find ThinkPad XXXX Platform Specifications file.
b) Find possible screen resolutions for your model.
c) My T450 has 1366*768 screen, but it has 2 lines eDP cable.
e) Find XXXX_frubom_xxxxxxxx.pdf file for you model, you can see different cables for your model. X250 has only one eDP cable (2 lines) despite they ships with HD and FullHD screens.
I found next labels on my screen T450 cable (Motherboard connector) support FullHD:
DC02C006D00 SC10G41383 LUX10A5C3
If you have same numbers, you can replace HD to FullHD w/o cable replace.
I found next labels on my screen T450s cable (Screen connector) support FullHD:
Search for videos on youtube )))
"Sheet Cover" - plastic sheet with double side tape to cover "Front bezel". Easy to remove.
IMHO: you can replace original double sided tape to any thin double sided tape from a shop.
You can buy new "Sheet Cover" with new double sided tape if you can't restore original thin double sided type.
Only $21 on eBay ) Search for "ThinkPad T450 LCD Front Bezel AP0SR000500 04X5448 + Sheet Cover"
"Sheet Cover" is relatively strong. Screen for T450 and T450s has "Front Bezel" - some plastic frame.
The T450s bezel has "locks" on "external" border. You need to pool frame from "screen" side to carefully remove the bezel.
T450 bezel has "locks" on "screen" border. You need to pool frame from "external" side to carefully remove the bezel.
How to find the best screen:
I recommend compare screen on this site.
Example for T450s/T450: Compare example
My preferences, brightness, contrast, color space, resolution (11 models):
Short list. Some are not compatible.
All compatible (25 models):
Full list. Some are not compatible.
I don't guarantee that all these models are compatible with Lenovo T450s/T450.
Some of them require an additional backlight (B140HAN01.4), some have different power requirements.
On eBay and Amazon, most sellers offer cheap compatible models. Advertise as B140HAN01.1 or B140HAN01.2 compatible model )))
You buy cheap screen for low price or sometimes for high price )
I order original AUO b140han01.1 you can find them on eBay too.
They sell exact "B140HAN01.1".
But be careful! They sell fake AUO b140han01.2 cheap "Any of list in FAQ"!
I tried installing new AUO and old LG to both laptops.
The result is same for both: brightness is not working for AUO (because of wrong EDID) and works for LG (with Lenovo EDID).
Just for information:
Use "m.2 2242 SSD" in WLAN slot as the boot drive for Window 10 (T450 & T450s).
Upgraded WiFi Intel 7265 to Intel 8265 - works fine (T450s).
END OF THE GUIDE.
I like AUO, my mom like Innolux ))) I show T450 and T450s with AUO and Innolux with same image - my mom choice Innolux, my father choice AUO between AUO and LG.
At first impression my girlfriend choice LG between AUO and LG (she don't like Innolux). After a few days, she admits that AUO is better.
So, people have different preferences. I bought this B140HAN01.1 tech info
01-24-2018 06:46 PM - last edited on 01-27-2018 07:02 PM by NateS
Great writeup, Dima!
I've got the T450 with bios v1.30 and didn't think to check the brand when replacing the original monitor. (I upgraded not because I needed 1080P IPS, the original wasn't quality and an eyestrain compared to most displays on non-premium consumer devices.) Are you sure we're out of luck as far as the brightness issue? It seems hit-or-miss on Amazon because some reviews (recent and old) report that the brightness actually works with Win10. Seems like there are 3 options:
1) Live with a "very" mediocre screen.
2) Upgrade for ~$50 and band-aid the brightness issue with an overlay solution that doesn't help the battery.
3) Burn the EIDE into the new monitor.
...I wonder if there's a 4th option to identify which screen out there works perfect (if any).
Moderator comment: Post edited to conform with the Community Rules. Keep it clean.
01-27-2018 05:04 PM
Additional options that I can imagine:
Only screens from same Lenovo models will work fine, because Lenovo change EIDE of all monitors and write it in BIOS.
I tested only T450s <=> T450. Screen from T450s works fine on T450 and vice versa.
IMHO you can read "frubom" files from different models and find similar.
IMHO screens are same from: T450s, T450, L450, T460s, T460 etc. I don't know all models.
IMHO full list can be found in BIOS file. You need search something like "Lenovo LP140WF3-SPD1"
1. You can buy screen on eBay from not working laptops (high risk).
2. Contact authorized Lenovo service centers, maybe they can sell you required screen directly from Lenovo warehouse.
P.S. I found one more bug with not original screen:
Screen "flickering / blink" on battery mode, every 5-10 seconds.
Solution: disable power management in Intel Graphics Control Panel.
IMHO Intel try to enable some power savings, but Lenovo BIOS say "I can't". It repeats every 5-10 seconds.
01-30-2018 12:44 AM
Two heads are better than one! I've got a couple of new findings:
1) Official FRU for 1080p IPS parts seem to be 00HT622 (AUO) or 04X5916 (LG)
2) A user (adrian_sa) claims he was able to successfully flash his bios (I assume the EEPROM on the oem monitor itself) using Ubuntu and flashrom.
I've got a LGD0521 (LG Phillips) on mine, wishing it was passable in the BIOS whitelist for monitors for brightness control, maybe I can also use Ubunto to flash its EEPROM, which seems like a daunting task, or look for a vendor that sells actual 00HT622 or 04X5916 screens.
01-30-2018 10:02 AM - last edited on 01-31-2018 04:06 AM by Andy_Lenovo
Change EIDE of monitor or BIOS is the complicated task with the high risk of unrecoverable errors.
You are in the US (i'm not), you can call official services:
[Admin: link to site not maintained by Lenovo removed]
Tell them a simple story: you have laptop w/o guarantee, your screen is broken.
How much will it be for the replacement for "full HD" screen?
Try to contact tech personal directly.
Another option: you can search tech staff from companies above on Facebook and discuss screen issue directly.
Screen cost from Lenovo warehouse is about $40-60 (my estimation) for AUO/LG.
Time cost: less 1 hour if your screen cable support full HD and don't need to replace.
P.S. I decided to not buy Lenovo with bad screen anymore )
01-30-2018 02:14 PM - edited 01-30-2018 05:40 PM
I contacted Lenovo via Facebook, and was advised to enter the part no. 04X5916 here:
Desc: Sting2 FRU LCD Panel LGD 14” FHD IPS AG, slim 300nit(LP140WF3-SPD1)
There's a link for the same part no. on Amazon:
I'm not sure if it's the same.
01-30-2018 04:09 PM
As it was suggested earlier, if you're going to purchase it from third-party sellers, just contact them first to make sure that they have the exact screen with the FRU on it. 99% of sellers are trying to plunge some other compatible model.
Been there - done that
01-30-2018 05:08 PM - last edited on 01-31-2018 04:06 AM by Andy_Lenovo
I wrote about "Lenovo Service Repair Centers".
[Admin: link to site not maintained by Lenovo removed]
Service Repair Centers are 3rd party companies. They have many laptops for parts and they have access to original laptop part at a much lower price.
$211.38 for LG is expensive. Lenovo buys it less than $50, change EIDE and resell for $211. But 3rd party service centers usually have access for a lower price from Lenovo.
Like carpediem90 said, and I wrote in the initial post: too many "similar" screens on the market. You need to be sure before buy.
01-30-2018 06:44 PM
It's often hard to get a clear answer from the vendor whether the actual Lenovo FRU is on the monitor, which is why burning the eeprom using Ubuntu and flashrom (if possible) might be better (though it sounds risky as mentioned).
02-08-2018 10:00 PM
I just got an ThinkPad T450 with the following specs:
I give the screen replacement a try with your instructions.
I ordered the display from the link below. Since he says that it is an original Lenovo and for a really good price, I couldn't resist.
I'm waiting for the display at the moment. But it should arrive in the next 2 days.
It was a bit of a hassle to remove the protective screen from the display.
Had to use a hair dryer and a sharp knife.
I'll let you guys know how it worked out for me.