Question about Dell jt782 - Fan Assy Cpu Cooling, Optiplex 745, Usff
My employer has multiple 745s and the only thing wrong with them is "rear fan failure". Some rear fans work intermittently, but all need to be repaired. I believe the problem is with the fan's interface to the motherboard malfunctioning. I read about a fix where you could remove the interface from its socket on the motherboard and bridge the wiring to the interface supplying power and diagnostic info to the front fan, however I cannot find this post again to save my life. Does anyone know which function is associated with which color wire as I believe this is a proprietary wiring scheme? Or even better, does anyone know anything about the previous post I just referred to?
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Posted on Jan 02, 2017
SOURCE: Fan Noise on Dell Dimension 8100
All computer fans have a general design. The name in front of "fan" really refers to the designation. You'll see case fan, processor fan, CPU fan, cooling fan, etc. In the case of CPU/Processor fan, some are sold with heatsinks (the metal block sitting on top of your CPU).
The first thing you want to do is make sure the fan is clean. Chances are dust buildup is causing the excess noise.
If that's not the case and you're looking to replace the fan, then you first need to find out the size of the fan. General sizes(diameter X width in mm) are listed on this page:
Generally, you're looking for something that will match the size of what you're replacing & push enough air at a reasonable noise level to cool the heatsink/CPU. You want to stay in the area of 30dBA max for noise. You also want to see if it has a 3-pin or 4-pin connection.
For example, if you have an 80mm fan, I would suggest something like this:
It's pretty quiet with good airflow. Also, it has a 3-pin connection, but includes an adapter for a 4-pin connection.
Posted on Oct 27, 2007
1. motherboards for atx form factor pc's are powered even when the computer is off, particularly if you leave the computer plugged in to wall outlet... you better do not work on you computer while power cable is still connected to both, your pc and the wall outlet..
2. I found this thread that may be helpful, it may be the motherboard may have gone bad, cmos is corrupted or something may not be seated properly...it could also be one of these: Bad CPU, BAD ram, Bad power supply.. read the thread for details:
Posted on Sep 25, 2008
SOURCE: Diagnostic Indicator
Beep codes and power LED status are pre-post errors. Usually beep codes indicate a problem with a memory module. Power LED is solid green for normal operation. Solid or blinking Amber color power LED indicates a power distribution problem.
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Posted on Nov 13, 2008
Don't Worry we can fix this this problem.
This seems to be no power issue.
Just mail your email address and number to email@example.com
Posted on Mar 08, 2009
You hit that one right on the dot. ATI website showed the specs for that graphics card you installed as needing a 300 Watt power supply. Good news though... I researched newegg.com and I believe I found your 300W power supply. There are 4 different Optiplex gx280 designs with 4 completely different power supplies. Since you bought the low-profile video card, I believe you have the slim computer case and this power supply should work for you...
Posted on Jun 11, 2009
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