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Surface Book 2 - HWMonitor not reporting CPU fan

gchq

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Hi there

I have a 15-inch Surface Book 2 bought in 2018 - i7-8650U CPU, 16 GB RAM, 1TB SSD, Intel UHD Graphics 620 and GeForce 1060.

OS is Windows 10 pro

It is connected to a MS dock and keyboard, mouse, monitor and external drives are plugged in.

For quite some time it has heated up considerably after reboot from installing updates, sometimes hanging with a black screen before allowing login.

Quite often there were problems with screen resolutions and keyboard/mouse disconnecting and reconnecting - I put this down to an issue with the dock.

Recently the CPU spiked to 100% during a backup and the entire unit shut down and I couldn't get it restarted for about 30 minutes.

I did figure that MS telemetry was one of the main culprits, but disabling it in services and group policy doesn't seem to have gotten rid of it - I suspect that might be the bootup problem as well.

There is also an issue logged under system events - 'Surface Tcon Driver TP Read fails, Status = 0xc0000186' when it goes into and out of idle timeout standby. However, I gather this is a known fault with the Surface and the Surface Dock and it's been doing it from inception.

I did figure out that as soon as the mouse/keyboard start disconnecting and connecting that loading Task Manager would show high power usage. Shutting down the responsible app would restore the calm again - blamed the dock, but apparently it was processor issue.

Installed HWMonitor and although the GPU fan shows (albeit at 0 revs) the one for the CPU doesn't.

I can't actually ever remember hearing a fan, but the spec does include one for both GPU and CPU.

Did get a cooling pad, but with the CPU being in the top and the GPU in the bottom I don't think it will really help, unless I place it upside down.

Have blown the screen vents out with compressed air.

With any of the server boxes I am used to, pulling out the CPU, cleaning and adding new thermal paste after five years always helped, but getting into this thing looks like something of a nightmare - even those that do it for a living break 20% of the screens.

I have attached a couple of HWMonitor screenshots - as you can see, one is approaching the max temp for the i7-8650U and no fan is showing.
Processor_12May.png
Processor_09Jun_01.png
Processor_09Jun_02.png


Are there any suggestions?
 
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Hi there

I have a 17-inch Surface Book 2 bought in 2018 - i7-8650U CPU, 16 GB RAM, 1TB SSD, Intel UHD Graphics 620 and GeForce 1060.

Installed HWMonitor and although the GPU fan shows (albeit at 0 revs) the one for the CPU doesn't.

I can't actually ever remember hearing a fan, but the spec does include one for both GPU and CPU.

Are there any suggestions?
Link to the specs?
The CPU probably doesn't have a fan, I'd assume being that low power it would be a cooling block only, although I could be wrong.
 

gchq

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Joined
Jun 8, 2024
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Link to the specs?
The CPU probably doesn't have a fan, I'd assume being that low power it would be a cooling block only, although I could be wrong.
Will try to find the specs - 13-inch i5 didn't have any fans, 15-inch i7 had two - they are available as a replacement set

Update

The specs given by MS are not very helpful

But Amazon sells 'CPU and GPU cooling fan for Surface Book 2' and a reddit user reports a noisy fan - as explained above I've not heard a fan since I've had it, so call me confused.

This morning the mouse/keyboard disconnect/reconnect started - pulled up Task Manager, and it was Visual Studio background download causing it. I did have HWMonitor running at the time and the temp hit the max limit for the processor


1717922101815.png
 
Last edited:

gchq

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Joined
Jun 8, 2024
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Did manage to find this

'The most interesting design tweak is barely noticeable and happens under the chassis, with re-designed cooling which allows the 13.5-inch Core i5 model to adopt fanless cooling. The quad-core 13.5-inch Core i7 model, and the 15-inch model which the Surface Book 2 do use fans due to greater thermal demands from the more powerful processors.'
 
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