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#21
I mentioned the PSU tests because I was interested in whether the required voltage levels deviated from the nominal values when the system reset itself.
PC reboots if someone walk by
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New #22
It is a computer case which I bought at a local computer shop about 40 days ago. So it's too late to return it to the retailer. The vendor may agree to replace it with another same model but I am not sure that would solve the problem, because I do not know what the cause of the problem is. Is it the mobo, the PSU or the case? Maybe this particular mobo is just not compatible with this case. Since I tested the hardware system without using the case as mentioned in my previous post, I am pointing to the case which being possible culprit.
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New #23
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New #24
It involves a technique known as back-probing. Essentially, you probe the connections from the back of the plug (where the wires come out). See here for an illustrated description (scroll down to Measuring Voltage).
InformIT: PC Repair and Maintenance: In-depth Look at Power Supply > Power Supply Troubleshooting
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New #25
Yeah Dwarf... it could be a low voltage/high voltage issue! Eliminate possiblities and test this.
As for testing the voltage churin, make sure you use a good DVM (digital volt meter) and use the blk probe to any blk wire (gnd)... the red probe down the wire whos voltage you want to measure from the back (while plugged in and on of course).
Oh yeah... if the DVM has several voltage settings keep in mind you should expect to find most voltages in the 3-13 volt DC range <--- set your dvm accordingly!
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New #26
Another question. Did the case come with a PSU included? In many cases these are of inferior quality. Many people, including Scott Mueller (of Upgrading and Repairing PCs fame), recommend replacing these units with more reliable ones.
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New #27
I taught A+ for years... always loved the Scott Mueller series! A great resource!
I agree with you again... a good quality power supply is crucial to all my builds, whether a workstation or gaming rig.
What is the make and model of your PSU churin?
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New #28
Dwarf;
I measured those voltages as follows:
Pin 7 - Pin 8: 3.7V and stayed unchanged with reset by electrostatic discharge.
Pin 15 - Pin 16: 0V and stayed unchanged with reset by electrostatic discharge.
The PSU did not come with the case. It is BFGR550WGXPSU
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New #30
@Darryl:
No, that voltage level is OK. It has to remain at a value that is less than the threshold of 2.0V in order for your PC to operate. To check this, power down your system so that it is on standby and connect a multimeter as described above to the appropriate pins. What voltage reading do you get? Now power up your system. What is the reading now?
@churrin:
The PSU sounds OK, and the voltages are within the required tolerances.
This image is taken from one of your images. What is the item that I have ringed? It seems to be obstructing the front panel connectors. Also, route the main power harness away from the board so that it doesn't press down on it.
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