T60: Very Faint LCD Flickering on Battery [SOLVED]

T60/T61 series specific matters only
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wswartzendruber
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T60: Very Faint LCD Flickering on Battery [SOLVED]

#1 Post by wswartzendruber » Sun Jul 22, 2007 12:32 pm

I just updated my BIOS not too long ago to 2.14 and I'm starting to notice very faint, rapid LCD flickering when there's sudden draw on the CPU. Changing the power settings in the BIOS has no effect. This only occurrs when running on the battery.
Last edited by wswartzendruber on Thu Aug 09, 2007 10:23 am, edited 1 time in total.
Model: Lenovo ThinkPad T400
CPU: Intel Core 2 Duo P8400 (2.26 GHz, 1067 MHz FSB, 3 MB L2 Cache)
RAM: 4 GB PC-8500 (1067 MHz, Dual-channel)
HDD: 500 GB, 54000 RPM
Audio: Conexant CX20561 (192 kHz, 24-bit)
Video: Intel GMA 4500MHD
Wireless: Intel 5300

infilzw
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Location: Frankfurt am Main, Deutschland

#2 Post by infilzw » Sun Jul 22, 2007 1:36 pm

I think re-update BIOS to the 2.13 Version is a better choice.
A31p P4m2.6G/1G/UXGA ips/60G/BT
T41 Dothan2G/2G/SXGA+/60G/Wifi
T60p Core2.16/2G/UXGA/100G/BT

wswartzendruber
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#3 Post by wswartzendruber » Sat Jul 28, 2007 6:24 am

Okay, for those of you with the GMA 950 and Windows Vista:

Please go to Windows Explorer, hit <Alt> then <Down> to reveal the menu bar with a menu, and then hold down <Left> to quickly cycle through the menus. My question is, does your entire display flicker rapidly when running on battery? Do you have Aero enabled?

I have updated to BIOS 2.16 with no fix.
Model: Lenovo ThinkPad T400
CPU: Intel Core 2 Duo P8400 (2.26 GHz, 1067 MHz FSB, 3 MB L2 Cache)
RAM: 4 GB PC-8500 (1067 MHz, Dual-channel)
HDD: 500 GB, 54000 RPM
Audio: Conexant CX20561 (192 kHz, 24-bit)
Video: Intel GMA 4500MHD
Wireless: Intel 5300

wswartzendruber
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Posts: 377
Joined: Fri Apr 15, 2005 10:33 am
Location: Idaho, USA

#4 Post by wswartzendruber » Mon Aug 06, 2007 1:26 am

I put BIOS 2.13 back on here and it still does it. I've tried maxing out the BIOS power settings and the Windows power settings.

Is no one else having this problem? Is my battery maybe getting too old at one year?
Model: Lenovo ThinkPad T400
CPU: Intel Core 2 Duo P8400 (2.26 GHz, 1067 MHz FSB, 3 MB L2 Cache)
RAM: 4 GB PC-8500 (1067 MHz, Dual-channel)
HDD: 500 GB, 54000 RPM
Audio: Conexant CX20561 (192 kHz, 24-bit)
Video: Intel GMA 4500MHD
Wireless: Intel 5300

furrycute
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Location: New York, NY

#5 Post by furrycute » Mon Aug 06, 2007 3:06 pm

The new power manager has a setting that will cycle the LCD at a lower refresh rate when on battery power. Open up your power manager and change that setting. See if that helps.
T60p

wswartzendruber
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#6 Post by wswartzendruber » Thu Aug 09, 2007 10:21 am

FOUND IT!!!

Okay, it's not a setting in Lenovo's power manager (couldn't find it there), but I did go looking through the Intel GMA 950 settings and found it there. I disabled it, and now there's no more flicker!

SOLVED!
Model: Lenovo ThinkPad T400
CPU: Intel Core 2 Duo P8400 (2.26 GHz, 1067 MHz FSB, 3 MB L2 Cache)
RAM: 4 GB PC-8500 (1067 MHz, Dual-channel)
HDD: 500 GB, 54000 RPM
Audio: Conexant CX20561 (192 kHz, 24-bit)
Video: Intel GMA 4500MHD
Wireless: Intel 5300

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