Showing results for 
Search instead for 
Do you mean 
Reply
Punch Card
Posts: 13
Registered: ‎04-14-2010
Location: new jersey
Message 1 of 9 (1,163 Views)

How to identify mb heat sensor for R51

I need to replace or short out a failed heat sensor so the fan will run - can anyone tell me how to find it on the motherboard? Thanks!

Microsoft MVP Contributor
Posts: 21,009
Registered: ‎12-19-2008
Location: Australia, Melbourne
Message 2 of 9 (1,154 Views)

Re: How to identify mb heat sensor for R51

there is no schematic for the heat sensors for the R51, but you could look at the heat sensor position on the T4x, to get a rough idea of where it is on the R51.

 

http://www.thinkwiki.org/wiki/Thermal_sensors#ThinkPad_R51

 

Unfortunately there is a glitch on the Lenovo forum, where i can't access at your post history. So what made you determine that the sensors on the R51 has shorted out?

 

Use TPfancontrol to manually control the fan speed, this is a far easier way to manage your heat sensor problem.

Regards,

Jin Li

May this year, be the year of 'DO'!

I am a volunteer, and not a paid staff of Lenovo or Microsoft
Punch Card
Posts: 13
Registered: ‎04-14-2010
Location: new jersey
Message 3 of 9 (1,136 Views)

Re: How to identify mb heat sensor for R51

Firstly, many thanks for the quick reply!! The fan functions, however, it is not being kicked into high speed when CPU use gets heavy, thus leading to heat-induced shutdowns. So I think that sensor is not sorted but is not functioning correctly, and surmised that the easiest way to deal with this might be to just short the appropriate leads on the sensor in order to make the fan run at full speed all the time. But any advice is appreciated.

 

                       -- Bob

Punch Card
Posts: 13
Registered: ‎04-14-2010
Location: new jersey
Message 4 of 9 (1,134 Views)

Re: How to identify mb heat sensor for R51

Correction: "sensor is not sorted" should be "sensor is not shorted"

Microsoft MVP Contributor
Posts: 21,009
Registered: ‎12-19-2008
Location: Australia, Melbourne
Message 5 of 9 (1,124 Views)

Re: How to identify mb heat sensor for R51

just download Tpfancontrol and leave the fan running at either level 6 or 7.

 

Also, what is the temperature reading for your CPU and GPU when in the Tpfancontrol?

 

Fan not running at full speed is usually due to the software thermal management issue, not thermocouple per se. Unless you are getting erraneous temperature reading.

 

It is advisable that you don't short circuit anything on the motherboard. As this may cause more damages to the motherboard. 

Regards,

Jin Li

May this year, be the year of 'DO'!

I am a volunteer, and not a paid staff of Lenovo or Microsoft
Punch Card
Posts: 13
Registered: ‎04-14-2010
Location: new jersey
Message 6 of 9 (1,108 Views)

Re: How to identify mb heat sensor for R51

Forgot to mention, machine runs Unix. it's not my machine but I will find out which version...

Punch Card
Posts: 13
Registered: ‎04-14-2010
Location: new jersey
Message 7 of 9 (1,090 Views)

Re: How to identify mb heat sensor for R51

Machine runs FreeBSD.

Guru
Posts: 7,626
Registered: ‎11-23-2007
Location: USA
Message 8 of 9 (1,072 Views)

Re: How to identify mb heat sensor for R51

Check if any of this might work for you, my knowledge of FreeBSD is non-existant...


http://www.thinkwiki.org/wiki/How_to_control_fan_speed


http://www.thinkwiki.org/wiki/ACPI_fan_control_script


http://www.thinkwiki.org/wiki/Talk:ACPI_fan_control_script


Good luck.

 

Cheers,

George




In daily use: R60F, R500F, T61, T410

Collecting dust: T60

Enjoying retirement: A31p, T42p,

Non-ThinkPads: Panasonic CF-31 & CF-52, HP 8760W




Starting Thursday, 08/14/2014 I'll be away from the forums until further notice. Please do NOT send private messages since I won't be able to read them. Thank you.
.
Punch Card
Posts: 13
Registered: ‎04-14-2010
Location: new jersey
Message 9 of 9 (1,067 Views)

Re: How to identify mb heat sensor for R51

George - many thanks, will check and report back!

Top kudoed Authors
User Kudos Count
1
1