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Punch Card
Posts: 13
Registered: ‎07-01-2009
Location: US
Views: 3,802
Message 1 of 5

T60p NMI parity check/memory parity error and display failure

Hi all, I recently got this BSOD error message on my T60p:


*** Hardware Malfunction

Call your hardware vendor for support

NMI: Parity Check/Memory Parity Error

*** The system has halted ***


Upon rebooting, the display failed--the backlight comes on, but there are no images, not even the ThinkPad pre-boot flash screen.  As  far as I can tell without a display, the system boots normally, ie, the hard drive operates and there are no system beeps.


Have you seen this issue before, or can you suggest possible causes?


System Specs

Model 8743-CTO Widescreen

Intel Core 2 Duo T7400

ATI Mobility FireGL V5250 256 MB


Windows Vista 32


Thanks for your help.

Community SeniorMod
Community SeniorMod
Posts: 3,259
Registered: ‎12-01-2007
Location: US
Views: 3,797
Message 2 of 5

Re: T60p NMI parity check/memory parity error and display failure



A few things to check/try, in no particular order:


Have you tried getting into the BIOS or booting with an external monitor attached?


Have you tried running a program like MemTest86 to test the memory?


Have you checked the voltage on the BIOS (CMOS/RTC) backup battery?




Aryeh Goretsky


I am a volunteer and neither a Lenovo nor a Microsoft employee.

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Punch Card
Posts: 13
Registered: ‎07-01-2009
Location: US
Views: 3,768
Message 3 of 5

Re: T60p NMI parity check/memory parity error and display failure

Thanks Aryeh.  I connected an external monitor and rebooted several times.  During about 50% of the attempts, both screens stayed blank and the system halted after sounding one long beep and two short beeps.  On the other attempts, the external monitor showed the initial "Starting Windows" screens, but the images were corrupted with "snow" or vertical red bands that appeared on the screen.  Eventually, the system would halt after displaying the same NMI parity check/memory parity error as before.

Bit Torrent
Posts: 2,220
Registered: ‎01-02-2011
Location: US
Views: 3,764
Message 4 of 5

Re: T60p NMI parity check/memory parity error and display failure

The beep code and visual artifacts are consistant with grapics processor failure, but could also be elsewhere in you system board. The result is the same, and the only fix is to replace or repair your system board. 


A lot of T60 owners like to swap a T61 board with Intel graphics. The main reason is they can run faster CPU chips and support upto 8GB of ram instead of only 3GB, but used T60 boards aren't uncommon and would probably be the cheaper way to go.


However, before you condem your board, I'd remove as much hardware as possible...  harddrive, optical drive, pcie cards and all but one ram chip and see if you can get it to boot into bios. 

ThinkPad W-510 i7-820QM(1.73-3.06GHz) Quad Core... ThinkPad T500, T9900, 8gb SSD...FrankNpad T-60p/61p (X9000 2.8ghz) 8gb SSD ips FlexView...ThinkPad T-61p (T9300 2.5ghz) 8gb ram...Thinkpad X-61 Tablet 8gb ram.
Blue Screen Again
Posts: 8
Registered: ‎08-02-2008
Location: US
Views: 1,967
Message 5 of 5

Re: T60p NMI parity check/memory parity error and display failure

HI, I was searching for solutions to my "NMI: parity check? Memory parity error" blue screen and came accross your post.

I also have a FrankNpad, 2.6ghz, Crucial 8gig mem, T61 running win7pro with all updates, and running Samsung 840 pro 512 ssd. I am a very involved power user, test and have many programs for system speed improvements, helping others keep machines in perfect, virus/malware free systems.


I need to speak to anyone out there that has more experience than I do about the FrankNpad Bios change, utilizing 8gig mem if this is an ongoing problem. Memtest comes up with nothing. I just dismounted a usb3 external card because it lost it's driver and I have to find it on the net. maybe that is why.

I also have the nvidia140 128mb video card, (lame to say the least). Wonder if this is a problem, and could I install a better video card in the card slots I have for a better video experience??


Please advise.

   Thank you for your valuable time! I am here to help anyone also.



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