T40 Screen is a little dim

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thinkpad321 · #1 Post by **thinkpad321** » Fri Mar 25, 2011 8:36 pm

Hi

I have two T40. One has a very bright LCD (Mobility Radeon 9000). The other is noticeably dimmer (Mobility Radeon 7500).

I just replaced the LCD on the dimmer one because the backlight when out... But it a bit dim before it had a problem.

Does anyone know why one is so dimmer. I do have the brightness all the way up via the FN + Home keys.

#2 Post by **RealBlackStuff** » Sat Mar 26, 2011 7:36 am

CCFLs lose their brightness with age and/or lots of use.

Neil · #3 Post by **Neil** » Sat Mar 26, 2011 7:50 am

Just a guess, but could it be that the inverter is not putting out enough voltage? If you want to experiment, you could swap inverters between your two machines, and see if the dimness follows the inverter.

thinkpad321 · #4 Post by **thinkpad321** » Sat Mar 26, 2011 9:18 am

Neil wrote:Just a guess, but could it be that the inverter is not putting out enough voltage? If you want to experiment, you could swap inverters between your two machines, and see if the dimness follows the inverter.

Hi

Thanks for the response. I swapped inverters and there is no change. The LCD is still a little dim. The dimness does not make it unusable.

I still would like to fix it if it's an easy fix.

Any help would appreciated.

kaede · #5 Post by **kaede** » Sat Mar 26, 2011 10:48 am

RealBlackStuff wrote:CCFLs lose their brightness with age and/or lots of use.

then this is your answer. replacing ccfl i would say abit complicated.

poshgeordie · #6 Post by **poshgeordie** » Sat Mar 26, 2011 11:54 am

How to Replace the CCFL: http://forum.thinkpads.com/viewtopic.php?f=31&t=88991.
Note that this is for a 15" IPS/Flexview but will give you an idea - not for the faint hearted!

T40 Screen is a little dim

T40 Screen is a little dim

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