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Some keys on my laptop have stopped working


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#1 downByTheSeaside

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Posted 17 July 2010 - 03:23 PM

(Full system spec's at the foot of this post. Briefly: Lenovo N100 laptop; Windows XP Home 2002 SP 3)

……………………………………………………..


After what seemed to be a RAM failure that I somehow fixed, some keys have stopped working.

The non-working keys, sorted by row and separated by commas, are:

F1, F8, F9, Insert, Pause
`, 5, 6, -, =
(left) CTRL

Also, the Fn key no longer work in conjunction with these keys:

Fn+F1, Fn+F4, Fn+F5, Fn+F7, Fn+F12, Fn+ScrLk, (Fn+SysRq, Fn+Break: I don’t know if these combo’s work but don’t have any need for them)

……………………………………………………..


Incident leading to the problem:

This problem occurred after I apparently broke the machine while the system was going into Hibernation mode (because the battery was almost empty). Being extra impatient that day, I thought to bypass the long hibernating process by pressing the power key to power off the machine. That succeeded, of course, but seemed to fry something.

Next time I powered on the machine, nothing happened, not even the BIOS powered up. Instead, the machine emitted a series of beeps. I can’t remember the sequence now, unfortunately, but a search on my work machine suggested that the beep sequence indicated either a busted motherboard or broken RAM.

Turns out that I only had to reseat the RAM to bring the machine back to life.

Except that a bunch of keys (and Fn combo’s) no longer worked.

……………………………………………………..


Potential solutions that I’ve tried:

* Opening the laptop and checking the keyboard connection; it seems to be properly connected
* Updating and flashing the BIOS
* Reinstalling the keyboard device driver
* System restore
* Booting into Safe Mode


……………………………………………………..


Other ideas:

* Buy and install a new keyboard - but how do I first rule out that the keyboard alone is the problem (and not, for example, the motherboard?).
* Is it possible that there’s a conflict between the keyboard driver and other software?
* The keyboard driver is actually for the “Standard 101/102 key or Microsoft Natural PS/2 Keyboard”. I can’t locate a Lenovo keyboard driver. However, this same driver worked fine for over two years.
* Does a Windows reinstall solve this problem? I’m loathe to try it except as the very last resort!

……………………………………………………..


Many thanks to all for your help!


..............................................


Full spec's:


Lenovo System Toolbox: System Information

Operating System

Name Microsoft Windows XP Home Edition (32-bit)
Service Pack Service Pack 3
Build Number 2600
DirectX Version 9.0c (4.09.00.0904)


System Information

Manufacturer LENOVO
Product 07686VG
Total Number of Logical CPUs 2
Total Physical Memory 2.00 GB
Total Number of Optical Drives 1
Total Number of Hard Drives 1
Total Number of Video Cards 2
Total Number of Memory Modules 2
Total Number of DIMM slots 2
System Name N100


Motherboard

System Board

Chipset Intel i945GM/PM/GMS 940GML
Southbridge Intel 82801GBM (ICH7-M)

Base Board

Manufacturer LENOVO
Product CAPELL VALLEY(NAPA) CRB

BIOS

Vendor LENOVO
Release Date 06/04/07
BIOS Version String 61ET37WW
ROM Size 1.00 MB

SMBIOS

Version 2.4
Maximum Structure Size 134 bytes
Table Size 1.40 kB

Genuine Intel® CPU T2300 @ 1.66GHz

Name Genuine Intel® CPU T2300 @ 1.66GHz
Cores 2
Threads 2
Current Speed 1.66 GHz
Features MMX, SSE, SSE2, SSE3, XD
L1 Instruction Cache 2 x 32.00 kB
L1 Data Cache 2 x 32.00 kB
L2 Cache 2.00 MB



Memory

Total Physical Memory 2.00 GB
Maximum Supported Memory 3.00 GB

1024 MB DDR2-SDRAM (PC2-5300 / 667 MHz)

Memory Size 1.00 GB
Memory Type DDR2-SDRAM (PC2-5300 / 667 MHz)
Memory Manufacturer Qimonda
Memory Manufacture Date Week 49, Year 2007
Memory Part Number 64T128021EDL3SB2
Memory Serial Number 16040C14
Memory Revision Code 0E23

1024 MB DDR2-SDRAM (PC2-5300 / 667 MHz)

Memory Size 1.00 GB
Memory Type DDR2-SDRAM (PC2-5300 / 667 MHz)
Memory Manufacturer Micron Technology
Memory Manufacture Date Week 10, Year 2007
Memory Part Number 8HTF12864HDY-667E1
Memory Serial Number 0E364A3F
Memory Revision Code 0001


Local Disk

HTS541080G9SA00

Model Number HTS541080G9SA00
Firmware Revision MB4IC60R
Total Capacity 74.53 GB
Buffer Size 7.36 MB
Temperature 46 C
Driver c:\windows\system32\drivers\disk.sys
Driver Version 5.1.2535.0, 7-1-2001

C:

Drive Letter C
Volume Serial Number 686E-7178
File System NTFS
Volume Capacity 70.22 GB
Volume Free Space 13.89 GB
Volume Used Space 56.33 GB



CD-ROM Drive

HL-DT-ST DVDRAM GMA-4082N

Model Number HL-DT-STDVDRAM GMA-4082N
Firmware Revision HA01
Drive Letter D
Total Capacity 2.00 kB
Readable Media CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-R, DVD-RW,
DVD-R DL, DVD+R, DVD+RW, DVD+R DL
Writable Media CD-R, CD-RW, DVD-RAM, DVD-R, DVD-RW, DVD-R DL, DVD+R,
DVD+RW, DVD+R DL
Write Strategy TAO, SAO, RAW
Driver c:\windows\system32\drivers\cdrom.sys
Driver Version 5.1.2535.0, 7-1-2001



Display

Plug and Play Monitor

Mode 1280 x 800 (32-bit) (60 Hz)
Signal Type Digital



Video Card

Mobile Intel® 945GM Express Chipset Family

Manufacturer Intel Corporation
Video Card Chip Type Intel® GMA 950
Video Card Memory 128.00 MB
Video Card BIOS Intel Video BIOS
Driver c:\windows\system32\drivers\ialmnt5.sys
Driver Version 6.14.10.4543, 3-23-2006

Mobile Intel® 945GM Express Chipset Family

Manufacturer Intel Corporation
Driver c:\windows\system32\drivers\ialmnt5.sys
Driver Version 6.14.10.4543, 3-23-2006



Video Capture Device

Integrated Camera

Device driver file name C:\WINDOWS\twain_32\snp2std\snp2TUI.dll



Modem

PC Connectivity Bluetooth Modem

Model PC Connectivity Bluetooth Modem
Driver
Driver Version 3.2.0.0, 8-3-2007



Sound Card

SoundMAX Integrated Digital HD Audio

Manufacturer Analog Devices
Driver c:\windows\system32\drivers\adihdaud.sys
Driver Version 5.10.1.4130, 8-18-2005



Network Card

Intel® PRO/Wireless 3945ABG Network Connection

MAC Address 00:19:d2:98:cc:84
IP Address 192.168.1.3
Gateway IP Address 192.168.1.254
Current Speed 54.00 Mbps
Driver c:\windows\system32\drivers\netw3x32.sys
Driver Version 10.5.1.59, 7-26-2006

Realtek RTL8139/810x Family Fast Ethernet NIC #2

Driver c:\windows\system32\drivers\rtnicxp.sys
Driver Version 5.641.209.2006, 6-20-2006



Printers

SnagIt 8 Printer

Model SnagIt 8 Printer
Path SnagIt 8
Driver Path C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\UNIDRV.DLL
Driver Version 0.3.6001.22116

Microsoft XPS Document Writer

Model Microsoft XPS Document Writer
Path Microsoft XPS Document Writer
Driver Path C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\mxdwdrv.dll
Driver Version 0.3.6001.22204

Canon S750

Model Canon S750
Path Canon S750
Driver Path C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\CNMDR3q.DLL
Driver Version 0.3.000
Default Printer true

Brother DCP-330C USB Printer

Model Brother DCP-330C USB Printer
Path Brother DCP-330C USB Printer
Driver Path C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\brio06a.dll
Driver Version 0.3.000

Adobe PDF Converter

Model Adobe PDF Converter
Path Adobe PDF
Driver Path C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\PSCRIPT5.DLL
Driver Version 0.3.6000.16386



Keyboard

Standard 101/102-Key or Microsoft Natural PS/2 Keyboard

Manufacturer (Standard keyboards)
I/O Resources I/O Port : 0x0060h - 0x0060h, I/O Port : 0x0064h - 0x0064h
IRQ Resources Interrupt : 1 (Unshareable) (Edge Triggered)
Driver c:\windows\system32\drivers\i8042prt.sys
Driver Version 5.1.2600.5512, 7-1-2001



Pointing Device

HID-compliant mouse

Manufacturer Microsoft
Driver Provider Microsoft
Driver Path c:\windows\system32\drivers\mouhid.sys
Driver Version 5.1.2600.0, 7-1-2001

Synaptics PS/2 Port Pointing Device

Manufacturer Synaptics
Driver Provider Synaptics
Driver c:\windows\system32\drivers\i8042prt.sys
Driver Version 8.3.4.0, 5-19-2006



USB Controller

Intel® 82801G (ICH7 Family) USB Universal Host Controller - 27C8

Manufacturer Intel
Driver c:\windows\system32\drivers\usbuhci.sys
Driver Version 7.2.2.1007, 1-9-2006

Intel® 82801G (ICH7 Family) USB Universal Host Controller - 27C9

Manufacturer Intel
Driver c:\windows\system32\drivers\usbuhci.sys
Driver Version 7.2.2.1007, 1-9-2006

Intel® 82801G (ICH7 Family) USB Universal Host Controller - 27CA

Manufacturer Intel
Driver c:\windows\system32\drivers\usbuhci.sys
Driver Version 7.2.2.1007, 1-9-2006

Intel® 82801G (ICH7 Family) USB Universal Host Controller - 27CB

Manufacturer Intel
Driver c:\windows\system32\drivers\usbuhci.sys
Driver Version 7.2.2.1007, 1-9-2006

Intel® 82801G (ICH7 Family) USB2 Enhanced Host Controller - 27CC

Manufacturer Intel
Driver c:\windows\system32\drivers\usbehci.sys
Driver Version 7.2.2.1007, 1-9-2006

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#2 downByTheSeaside

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Posted 13 September 2010 - 04:33 PM

Well I fixed the problem by buying a new keyboard.

No thanks to bleepingcomputer!

#3 caperjac

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Posted 13 September 2010 - 04:51 PM

No thanks to bleepingcomputer!

sorry to hear that ,well at least you have it working now ,I myself remember reading your post when it first appeared ,but had nothing to to offer that you hadn't tried yourself already .

My answers are my opinion only,usually


#4 MrBruce1959

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Posted 13 September 2010 - 05:18 PM

Well I fixed the problem by buying a new keyboard.

No thanks to bleepingcomputer!

Come on now, Bleepingcomputer is a fabulous web site!

I am sorry to see that your problem was over-looked and I assure you it was not done intentionally.

Bruce.
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#5 hamluis

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Posted 13 September 2010 - 05:45 PM

Well...quite honestly...the solution was not likely to have been suggested, since many would have considered it rather obvious (IMO).

Oh, well...another dissatisfied paying customer :thumbsup:.

Louis

Edited by hamluis, 13 September 2010 - 05:46 PM.


#6 downByTheSeaside

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Posted 13 September 2010 - 07:19 PM

no probs, and thanks for the replies.

And i was being sarcastic earlier, BP is one of the best sites of its kind (but maybe not for keyboard problems ;))

#7 hamluis

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Posted 13 September 2010 - 07:52 PM

No problem :thumbsup:.

Louis




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