[ 3 / a / adv / an / asp / cgl / ck / co / diy / fa / g / gd / int / jp / k / lit / m / mlp / mu / n / o / out / p / po / sci / sp / tg / toy / trv / tv / v / vg / vp / vr / w / wsg / x]

/diy/ - Do-It-Yourself - Fan detection

<< back to board
[Delete this thread]

File: image.jpg-(13 KB, 322x134)
Fan detection
Fan detection Anonymous 05/17/14(Sat)13:30 UTC+1 No.639457 Report

Hey /diy/, I've been googling my ass off about this.

I have set up a fileserver yesterday. A HP Compaq 8000 Elite Ultraslim. As with all shitty ass compaqs they're really sensitive to changing hardware.

I live in a small apartment, meaning I need to make this thing as quiet as possible. 1 fan is completely sufficient for cooling it and quiet enough to sleep in the same room. However unplugging the rear chassis fan gives me the good old "512 - rear chassis fan not detected", obviously.

I'm fairly familiar with soldering and all however I cannot figure the fuck out what to do to make the fucker believe the fan is connected without actually connecting it.

THERE IS NO FUCKING BIOS OPTION TO BYPASS THIS CHECK!

How can compaq still build shit like this?!

Can anyone point me in the right direction?

I know the Pinout (see picture). No matter what I try, it knows I'm trying to fuck with it.

Please, oh god please help me here.
>>
Anonymous 05/17/14(Sat)15:27 UTC+1 No.639480 Report

yank the fan blade off the housing then mount it back up
>>
Anonymous 05/17/14(Sat)16:09 UTC+1 No.639493 Report

Have the same problem with my old system and new low speed fan.

Too solve this problem i build a multivibrator that generates a fake speed signal.

If you think you can build something like this i can provide further information.
>>
Anonymous 05/17/14(Sat)16:22 UTC+1 No.639501 Report

>>639493
Sounds interesting, however this:
>>639480
is pretty brilliant and sufficient for my needs.

I tried fixing the problem by wiring an LM7805 up to it. Reducing the voltage worked pretty well but I'd have to reduce it by about 2 volts more for it to be acceptable. I'm gonna rip the blades off. Thanks all

I'll save your relay however for further study, thanks
>>
Anonymous 05/17/14(Sat)16:27 UTC+1 No.639503 Report

>>639480
Won't work, the hub needs to spin to generate the RPM signal. It does however introduce the idea that you could simply cut the fan blades off the hub then sand off the remaining nubs.

You'll have a free RPM signal generator that won't make any more than a really quiet motor noise.
>>
Anonymous 05/17/14(Sat)16:30 UTC+1 No.639504 Report

>>639457
> As with all shitty ass compaqs they're really sensitive to changing hardware.
> No matter what I try, it knows I'm trying to fuck with it.
Indeed they are, and of course it does, otherwise the support hotlines would be full of morons like you who are trying to claim support/warranty on third party or modified hardware.

> THERE IS NO FUCKING BIOS OPTION TO BYPASS THIS CHECK!
Why would there be? How is the system supposed to know a fan has failed if you have disabled the test? And again, you'd be the first to call up and claim warranty because the DESKTOP computer you have decided to deploy as a FILE SERVER has overheated because you disabled a machine protection system. Totally the manufacturers fault, amirite?

> How can compaq still build shit like this?!
Compaq have not built a PC since 2002. The only reason "Compaq" appears in the name is because it was part of the sale terms IIRC. And you say "still" like you believe this is not a new thing. Why the fuck did you buy from a manufacturer you clearly hate you idiot?

You don't sound like you have the intelligence to do anything more with a soldering iron beyond plugging it in and burn "fuck you" into your desk, so forget building a circuit, go buy some silent fans, or just jam the existing fan with blutak.
>>
Anonymous 05/17/14(Sat)17:03 UTC+1 No.639518 Report

>>639504
Normally I don't reply to shitposts, however I feel that you actually mean what you just babbled, so let me clear this up for you m8.

>Why the fuck did you buy from a manufacturer you clearly hate
I didn't buy it, I got it for free

>Compaq have not built a PC since 2002. The only reason "Compaq" appears in the name is because it was part of the sale terms IIRC.
Yeah, didn't know that. Unfortunately I didn't find the time to read Compaq's Wikipedia article yet, I must've been busy earning money or enjoying the weather outside with females.
Sorry.

>Why would there be? How is the system supposed to know a fan has failed if you have disabled the test?
Why wouldn't there be? Normally you would have bought the hardware, so you should be entitled to do whatever you want with it. You can disable the check for changed hardware, but not for a fucking fan? Seriously?

>otherwise the support hotlines would be full of morons like you who are trying to claim support/warranty on third party or modified hardware.
That argument is invalid. You can make good money with support hotlines. Also if you open the case and unplug cables, chances are you know what you're doing. So support hotlines might be full of people complaining they can't unplug the fan without the PC not booting up.

So fuck off, this is a DIY board, buyfag.

>>639503
That's actually what I understood. I have reduced the voltage AND cut off the blades. Works like a charm.
>>
Anonymous 05/18/14(Sun)00:41 UTC+1 No.639656 Report

>>639504
>>639518
both of these posts sound butthurt as fuck.
All the content on this website comes from 4chan.org. All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster. 4chanArchive is not affiliated with 4chan.