Inspiron E1505 Windows 10 / XPS 10 Windows RT
Dimension 8400 Windows 7/8
If my answer was helpful, please use the 'Did this answer the question' and click: YesForum Member since 2001I am not employed by Dell
I read the descriptions with amazement. I have a Dimension 8400 that has for probably more than a year had the vacuum cleaner startup fan problem. It was intermittent making it hard to troubleshoot. Dell sent me a heat sink first, I replaced it. It seemed better for a while but started up again and they sent a technician to replace the fan. Seemed better for a while. Lately it has in increasing frequency of no startup, vacuum cleaner fan and I have to hold the start button 10 seconds to shut off. Another observation is it sometimes freezes and goes to the deadly blue screen intimating that my ATI graphics stuff is in an endless loop. I don’t recall a relationship between this freeze up at first but lately when this happens I would shut down and with restarting the vacuum cleaner is back. A week ago I got new thermal paste and no problem for one week.
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So yesterday the fast fan stopped being intermittent, the fan is taking off every startup. I tried about everything I read about in the forum. I got the fast fan even with the RAM out and with the video card out. It is now out of warranty and the service person was not as willing to help but with pointing out that they had documentation of this same problem they went through troubleshooting.
So we do a lot of the same things that I did already. Then one step further, she has me remove the heat sink then remove the CPU. Then put it back in. There was no clear reason why she wanted me to do this. Then while I was on hold I tried turning it back on and … it turned on. The main difference was removing the CPU. I turned it on and off several times and it worked. I thanked the tech person closed the case, turned it back upright (was working on it lying on its side). I plugged it in and without pressing the start key it turns itself on (only the vacuum fan) and revs up just like before! Tech support says get a new computer…
I try several things and it still whirrs with start up. So I take out the CPU and put it back in and it works again! So I am thinking it is something positional or an electrical contact. I stand it up and it does not start. I think I will lay it down and inadvertently lay it down with the motherboard up. This gets me vacuum cleaner. So I turn it over (without getting inside the machine) and now it is working again.
It seems like a positional thing related to the heat sink and the motherboard. I don’t get it. But I will keep it on its side while shopping for something new.
If I get a new motherboard from http://www.centrix-intl.com/results.asp how do I know which one to get?