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debacler
Punch Card
Posts: 10
Registered: ‎03-15-2011
Location: USA
Views: 1,901
Message 1 of 8

x120e backlight flicker

I saw the other thread about the flickering with lines across the screen. I have a similar but probably different problem. My whole screen flickers like a dying fluorescent bulb at low brightness. I have been able to consistently reproduce from the first time I booted up. Updated display drivers, disabled PowerPlay, tried various power profiles, tried on AC and battery - nothing had any effect. This very much looks like a hardware problem. Anybody else seeing this or is my screen just defective?

clicq
802.11n
Posts: 79
Registered: ‎03-14-2011
Location: USA
Views: 1,840
Message 2 of 8

Re: x120e backlight flicker

If you go into the BIOS (just start hitting enter when you turn on the computer), do you see the flicker there? If so, it sounds like a hardware problem.

 

How low does the brightness have to be to see the flicker? Just anything below max or do you have to get down to 1 or 2?

 

If not, it could be the "Varibright" setting in the video driver, though that just changes the backlight depending on what's on your screen, so it's more of a slow change in brightness (I know you said you disabled powerplay, but I'm not sure if you disabled varibright).

debacler
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Posts: 10
Registered: ‎03-15-2011
Location: USA
Views: 1,827
Message 3 of 8

Re: x120e backlight flicker

It flickers in the 0-2 range. Sometimes it takes a couple of minutes before it starts, but it does it constantly. It has nothing to do with varibright and it does the same thing in BIOS.
clicq
802.11n
Posts: 79
Registered: ‎03-14-2011
Location: USA
Views: 1,811
Message 4 of 8

Re: x120e backlight flicker

Sounds like a hardware issue then. Mine doesn't do it (or at least, if it does, I can't discern the flicker).

Yianaki
Paper Tape
Posts: 3
Registered: ‎05-09-2011
Location: USA
Views: 1,586
Message 5 of 8

Re: x120e backlight flicker

Did a replacement fix your issue poster?  I just bought my machine and I am not sure if this is something just some people notice, and that is how it is made.  I have never seen anything like this flickering before and I normally go with lower end laptops.  My x120e is actually replacing a Lenovo ideapad s10-1 that cost 199$, it's screen is perfect (as far as clarity goes).

 

I opened another thread not seeing this one...

http://forums.lenovo.com/t5/X-Series-ThinkPad-Laptops/x120e-Low-Brightness-causes-major-screen-flick...

Guru
Posts: 9,598
Registered: ‎12-26-2009
Location: CA
Views: 1,571
Message 6 of 8

Re: x120e backlight flicker

I saw the same issue with a SONY laptop I played with. Only did it on battery power though. My X100e with a Samsung panel doesn't flicker at all.

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
debacler
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Posts: 10
Registered: ‎03-15-2011
Location: USA
Views: 1,552
Message 7 of 8

Re: x120e backlight flicker

I haven't had time to get it RMA'd yet. I'll have to get it done soon as the problem seems to be getting worse and happening at higher brightness levels now. I saw a post on another forum with the same issue - he got it replaced and that took care of it.

 

From what I've read, there are two panels used in the x120s, an LG and a Samsung. I'm hoping they use the samsungs as replacements as they are supposedly a bit less terrible in terms of color / contrast / viewing angles.

debacler
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Posts: 10
Registered: ‎03-15-2011
Location: USA
Views: 1,487
Message 8 of 8

Got my x120 back from RMA. Inexplicably they replaced the...

Got my x120 back from RMA. Inexplicably they replaced the LCD cable, listing the symptom as "cannot adjust contrast." I have no idea where they got that from. The paperwork doesn't mention that the issue I sent it in for was even tested for. My problem - a flickering backlight - remains exactly the same. They did a sloppy job reassembling too (stripped HDD screw, wire channels not used, gunked up LCD). Wow.

 

I'll update again after RMA #2.

 

**Update**

Just received my laptop back again. This time they replaced out the panel and the issue appears to be resolved.

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