dv4t fan speeds

Can someone verify that the following fan behavior is normal for a dv4t?

With BIOS setting fan always on (default):

Powering up from shutdown or hibernate results in a constant low speed fan
Powering up after sleep mode results in a constant medium speed fan

After sleep mode the fan noise becomes annoyingly loud. If I do a shutdown or hibernate cycle the fan will go quiet again so it seems independent of the system temperature. This seems odd to me.

HP tech support was unable to verify if this is normal. I want to use sleep mode but can't tolerate the extra fan noise afterwards. The notebook has a P8600, intel GPU, and vista 32bit. Thanks in advance.

 

HP technical support has NO knowledge about such things. What they do when customers ask technical help is giving troubleshooting-solving steps or helping customers send their noteboks for repair, return, or exchange.
I really hope HP to have some phone numbers or e-mail addresses for customers who find errors, bugs, or problems in the BIOS or other HP-related programs.

Yes. My dv4t is exactly like yours. When I turn on my dv4t, its fan spins at its highest speed for a few seconds. Then, it spins at a constant low speed for hours unless I run some CPU-demanding programs. However, if I put it to sleep mode and power it up, its fan makes a very loud noise even if the CPU temperature is low.

I don't know other dv4t notebooks are like mine, but I have some problems with the temperature sensors of the CPU cores and the "fan always on" mode in the BIOS. The fan of my first dv4t with the T9600 used to spin at its lowest speed or not spin at all when the CPU temperature reached a certain temperature. ("fan always on" mode disabled) But, the fan of my second dv4t with the P8600 spins all the time without slowing down even if the CPU temperature is below 40 degrees Celsius. And, the minimum temperature of each of the CPU cores is set to 38 degrees Celsius. So, even if it is 32 C, temperature-measuring programs say it is 38 C. I think these are BIOS-related programs although it seems like I am the only person who has these problems.

 

Kent77, could you test this?

Disable the "fan always on" mode in the BIOS. The fan should not run at all or should run very quietly. Then, when the CPU temperature reaches a certain point, the fan will run at the loud medium speed. Does the fan keep running all the time at the loud medium speed?

Even if the temperature is low enough, the fan runs constantly at the medium speed. That looks like the enabled "fan always on" mode is better...

 

With "fan always on" disabled, the fan stays off for some time and then will cycle on and off every few minutes in short 5-6 second bursts at medium speed. I agree that the always on enabled mode is better as long as sleep mode is not used. You're right about tech support, they wanted me to send it in for "repair."

 

I tested to find out at what temperatures my fan stops and begins spinning when the "Fan Always On" mode is disabled..... It's ridiculous... LOL

I don't know why HP lowered those temperatures. My previous dv4t with the T9600 had a fan that stopped spinning at 42 degrees Celsius and began spinning at 58 degrees Celsius. And, that make sense. The T9600 usually stayed at the 40's. So, it stayed quiet most of the time. Then, when there were some CPU-demanding programs open and the temperature reached the 58-degree Celsius level, the fan span and lowered the temperature to 42 degrees Celsius.

Now, my dv4t with the P8600.... It stops spinning at 34 degrees Celsius and begins spinning at 50 degrees Celsius. The low fan speed (at which the fan spins when the "Fan Always On" mode is enabled) allows the CPU to remain at the temperatures from about 40 C to about 42 C when I'm just surfing the Internet. The medium fan speed allows the CPU to remain at about 38 degrees Celsius. That means it can never reach the 34-degree Celsius level to stop spinning unless I use a huge fan! If I were an HP dv4t BIOS developer, I would increase those temperatures a little bit...

Maybe... my dv4t is warmer than other dv4ts?

 

Just an update. My dv4t was shipped on Sep 19 2008 and I have noticed this fan issue with the p8400. Thing never shuts off and when your watching movies in bed it is noticable, any other time the fan seems quiet.

I always hibernate, so have not noticed the sleep issue.

this is my first notebook where the processor is cooler than the hd, so that's a plus, wish the fan settings were better...

 

I notice this same problem with my dv7t. After resuming from sleep mode, my fan is louder. Any ideas how to fix it?

Thanks

 

how do i check the dv4t BIOS?? and how do i disabel "fan always on"

 

Fan speeds are control by BIOS with help of sensors. Problem with HP is that they already gone through harrowing time when nVidia GPU's failed due to overheating. As result of which they increased fan speed(FAN nosie) to overcounter heat problem.

Now solution for this would obviously come from HP by improvement in bios by lowering fan speed to bare min.Current bios is F.30. lets hope for new bios to come quickly as possible.

Till then all of us should bug HP service center with fan noise so that they take step forward quickly.

Also post response u got when u talked to them regarding said problem??

 

Hello i have the same problem with my Dv4t.. and i recommend you to clean the fan it might be a bit dirty.. then go to the BIOS and disable the "fans always on" and then i really recommend you to follow this stepshttp://forum.notebookreview.com/showthread.php?t=235824 i did it and it really worked, my computer still makes noise but most of the time (about 80% of the time) in the low speed.

 

Hello i have the same problem with my Dv4t.. and i recommend you to clean the fan it might be a bit dirty.. then go to the BIOS and disable the "fans always on" and then i really recommend you to follow this stepshttp://forum.notebookreview.com/showthread.php?t=235824 i did it and it really worked, my computer still makes noise but most of the time (about 80% of the time) in the low speed.

 

PCNewb problem with my dv4 1242 tx is that when i connect laptop for charging intially fan remains normal but when battery charges upto 50% fan speed increases creating noise and when battery charge reaches upto 90% fan stops spinning at high speed irrespective of you do any activity. On battery it do not create any noise..That weird problem isn't it?? Need solution for it..
Basically in dv4t thread nobody experienced any type of fan noise..How come?