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LCD backlight dim

R400/R500 series specific matters only
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LCD backlight dim

#1 Post by Qassem » Sun Aug 11, 2013 4:49 pm

hi friends

I have problem in my laptop type lenovo R400
it is work normal but the back light it is not work (very dim)
led under the LCD not work except bluetooth led

if you have help to solve this problem


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Re: LCD backlight dim

#2 Post by 600X » Wed Oct 09, 2013 3:34 pm

Dim backlight -> Usually indicates an old CCFL display. The bulb is probably at the end of its lifetime.

However -> LED indicators not working may indicate that the inverter is damaged. The inverter also regulates the backlight, so there might be a connection.
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Re: LCD backlight dim

#3 Post by qu13tryan » Sat Oct 19, 2013 6:58 pm

Are you running Windows? Did you try changing the Power Options in Windows?

Is this only while on Battery power or when the laptop is plugged in / charging?

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Re: LCD backlight dim

#4 Post by court » Sat Oct 19, 2013 8:24 pm

T-420; Intel "Sandy Bridge" Core i7 2620m; 16 GB DDR3 1333 2x8 (Micron/Crucial); 256 GB M4 (Micron/Crucial); 1 GB NVIDIA Optimus Graphics (1600x900), Windows 7 Professional 64 Bit (VMWare XP SP3, VMWare Ubuntu -- [malware lab])

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