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From: Paul on 12 Jun 2010 02:17 MN wrote: > Paul, > I did remove the heatsink/fan assy and checked the CPU for damage, etc; it > appeared OK. I then removed the CPU and reinserted it, using the ZIP locking > screw. I then replaced one of the 2 Gig DDR2 memory sticks, and applied > power and presssed the case power button. For the first time, I got a SINGLE > beep and saw the BIOS screen on the monitor. Unfortunately, it shutdown > after a few seconds. I repeated pressing the the case power button with the > same results: shutdown after a few seconds. Pressing DEL to enter BIOS setup > did no good; it shutdown too quickly. Since the processor was getting quite > warm, I stopped powering-up the mobo. > > Later, I replaced the heatsink/fan assy and backplate. Then I repowered up > the mobo. It would not beep or display the BIOS screen on the monitor. I > removed the backplate (but keeping the the heatsink/fan assy on top of the > CPU) and powered-up the mobo; it again worked for a few seconds. After doing > this a few times, I noticed that the the heatsink/fan assy was getting quite > hot. It should be noted the fan NEVER rotated! > > The quick shutdown probably occurred because the BIOS was set to shutdown on > specific detected error(s). (Shutdown Temperature exceeded, no drives > connected, etc.) > > Although, I thought of spray painting the backplate and using it again, I am > considering getting a heatsink/fan assy that provides better cooling. (The > CPU got hot pretty quickly although it was not doing very much.). > > Thanx for mentioning the Arctic Silver products. I will definitely need > them, now. > > Since I will be ordering the Arctic Silver products, I might as well try to > find and then buy a more efficient heatsink/fan assy. > > Marty > You're making some progress. Keep going. Paul
From: Mark Lloyd on 16 Jun 2010 19:38 [snip] >Also, the CPU fan did NOT rotate nor were there any audible beep codes. On my latest computer, the CPU fan would not turn. That problem turned out to be purely mechanical (12V supply was OK). One of the thin plastic parts of the fan housing (this was between the fan and heatsink) was broken and interfering with the fan blades. If worked fine after I straightened it out. [snip] -- Mark Lloyd http://notstupid.us "Death is an experience best avoided, as it makes reliable internet access difficult to obtain."
From: MN on 16 Jun 2010 20:35
Mark, I recently discovered that the 3-pin fan header on the mobo did not have the documented pin assignments (sensor, +12v, Gnd) the same as the fan. I looked at manuals from other mobos, as well as 3-pin fan connector documentation, and this was indeed the case. The +12v and sensor pin connections were reversed on the mobo. (It is hard to believe that this mobo error exists since this mobo is version 3 of the design.) This incorrect signal assignment on the mobo's fan header would explain why the fan would not rotate at all when connected to the mobo. (I could rotate the fan by hand, so I knew it was not mechanically stuck.) I have removed the fan/heatsink from the mobo and I plan to cut the +12v and sensor fan wires and reconnect them in crossover fashion before I replace the fan/heatsink back onto the mobo. Before I do this, I will see if the fan rotates at all when I apply an external voltage (a 9 volt battery is convenient) to the +12v and Gnd pins. -Marty ======================================================================== "Mark Lloyd" <mlloyd(a)notroachstupid.usant.invalid> wrote in message news:0tni16lpacdm3ggs1226a9eek6pn3elq5s(a)4ax.com... > [snip] > >>Also, the CPU fan did NOT rotate nor were there any audible beep codes. > > On my latest computer, the CPU fan would not turn. That problem turned > out to be purely mechanical (12V supply was OK). One of the thin > plastic parts of the fan housing (this was between the fan and > heatsink) was broken and interfering with the fan blades. If worked > fine after I straightened it out. > > [snip] > -- > Mark Lloyd > http://notstupid.us > > "Death is an experience best avoided, as it makes reliable internet > access difficult to obtain." |