Re: 2740p fan issue (4812 Views)
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fanproblme
Posts: 14
Registered: ‎01-18-2011
Message 1 of 12 (5,387 Views)
Accepted Solution

2740p fan issue

Is anyone else having the problem with the 2740p fan? It's running at it's lowest setting, but refuses to turn off. I even set the BIOS fan off setting and still wont turn off. It's constantly blow cold air.The i5-560m CPU is supposed to have a maximum operating temperature of 105C. I ran the Intel CPU diagnostic utility (http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=19182&ProdId=3223&lang=eng) and it's reporting a CPU temp of 35C and the fan still wont turn off.

 

I think the 2740p BIOS fan setting are way too agressive. Any ideas on how to fix?

 

Occasional Visitor
jpidding
Posts: 3
Registered: ‎09-11-2010
Message 2 of 12 (5,343 Views)

Re: 2740p fan issue

I'm having the same issue.  The fan NEVER turns off.  I'm thinking something is defective.

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fanproblme
Posts: 14
Registered: ‎01-18-2011
Message 3 of 12 (5,333 Views)

Re: 2740p fan issue

I don't think there is a defect. When the machine wakes from sleep, the fan doesnt come on until 20-30 seconds later. I left the laptop in a cold room and the fan did eventually turn off.

 

It's probably the BIOS settings. HP set the fan temperature settings too aggresively so the fan stays on until the CPU is 30C or so, which is an overkill. HP needs to fix this in BIOS, sooner the better.

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fanproblme
Posts: 14
Registered: ‎01-18-2011
Message 4 of 12 (5,198 Views)

Re: 2740p fan issue

Did some further testing, the fan comes on at 30C and shuts off at 25C. So the fan is basically trying to cool the laptop to room temperature! This is for a Intel i5 CPU that has a rated max operating temperature of 105C!

 

Does the fan behave the same for all HP laptops? Please post if you have temp/fan data for your laptop.

 

 

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fanproblme
Posts: 14
Registered: ‎01-18-2011
Message 5 of 12 (5,142 Views)

Re: 2740p fan issue

[ Edited ]

Has anyone tried the HWiNFO32 fan control program?

http://forum.notebookreview.com/hp-business-class-notebooks/519840-hp-notebook-fan-control-hwinfo32....

 

Does anyone know if it works or if it's safe?

 

 

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fanproblme
Posts: 14
Registered: ‎01-18-2011
Message 6 of 12 (4,812 Views)

Re: 2740p fan issue

[ Edited ]
Occasional Advisor
Pascal Majon
Posts: 8
Registered: ‎08-16-2005
Message 7 of 12 (4,310 Views)

Re: 2740p fan issue

I have the same issue with my 2740p. The continuous operation of the fan reduces battery life as well. I've never had a notebook that allows the fan to run non-stop. I recently sent my 2740p to HP to repair this issue. I received it back two days later with a new motherboard and fan, which still runs continuously. My sound also doesn't work. Now I have to return it again.

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fanproblme
Posts: 14
Registered: ‎01-18-2011
Message 8 of 12 (4,305 Views)

Re: 2740p fan issue

The original 2740p fan settings are retarded. The fan runs at 3200rpm at room temperature blowing cold air all over the place. HWiNFO32 program works great, give it a try.You can set when the fan will come on and the fan speed.

 

http://forum.techinferno.com/hwinfo32-discussion/59-hp-notebook-fan-control-hwinfo32.html

 

I set the fan settings so that I have no fan noise during normal use, only comes on during video watching. As for the 2740p model in general, it is awful. If there was a tablet of similar size and performance, I would have returned the 2740p a long time ago. I have been super-glueing various parts of the laptop ever since I got it. The rubber screw covers on the bottom fell off the first week, and then the rubber screen bumpers, and now the screen frame is also coming off. Very poor construction and lack of attention of detail.

Occasional Advisor
Pascal Majon
Posts: 8
Registered: ‎08-16-2005
Message 9 of 12 (4,165 Views)

Re: 2740p fan issue

Thanks for the link. I hesitate to try a 3rd party tool but it may be my only option. I just got my 2740p back from HP for the 2nd time. The fan is still on even when idle for several minutes with 0 to 1% CPU usage.

Advisor
fanproblme
Posts: 14
Registered: ‎01-18-2011
Message 10 of 12 (4,098 Views)

Re: 2740p fan issue

HWINFO32 utility has been around since the 90's, so it's pretty reputable.

 

Have you tried to use bluetooth on your 2740p? Mine only has a range of 3 feet, MAX! I had to buy a USB bluetooth adapter to get proper range. Oh and the metal trim around the glass screen is starting to rust on mine. :smileymad:

Occasional Advisor
Pascal Majon
Posts: 8
Registered: ‎08-16-2005
Message 11 of 12 (3,576 Views)

Re: 2740p fan issue

Thanks. I got my 2740p back from HP (third try). This time the keyboard is bent. It looks like my keys are doing the wave. Thanks HP. The fan still blows cold air all day long. There is a recent firmware update which did nothing to address this. I tried HWINFO32. It seems to be ignoring my settings. I set the fan speed to 0 RPM until 50c, but whenever I save the settings the fan runs at full speed. Does anyone else have this issue?

 

fanproblme, I haven't tried the Bluetooth, so I can't be sure of the range.

 

Rust on a laptop? That's a first for me. That's gonna affect the reasale...

Advisor
fanproblme
Posts: 14
Registered: ‎01-18-2011
Message 12 of 12 (3,568 Views)

Re: 2740p fan issue

I never set the fan to 0, I set (1st row) to 2000 rpm and it prevents heat buildup and I can't hear the fan. I now tried 0 and yes, I can verify it does go to full speed.

 

Post the problem at

http://forum.techinferno.com/hwinfo32-discussion/59-hp-notebook-fan-control-hwinfo32.html

 

Also, you can just increase the 1st row temps until the fan turns off.

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