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Posted 03 December 2015 - 12:01 AM
Posted 03 December 2015 - 10:26 PM
This looks to me like a power supply failure. Lights (LEDs) on the MOBO are indication of five volts, but most fans need 12 volts and none of them are running. After the apparent failure of the video card, some other damage may have happened. A complete inspection may find a fractured or cold solder joint. I use a large magnifier with dual lamps to really get in the trenches. PCIe connectors on the MOBO can get fractured and solder joints broken loose. PS connectors also need a good looking at too. The fail to start unless the plug is pulled, not just turned off by front panel switch. Most front panel switches are now low voltage, always powered types. Removing the AC power allows the PS to fully reset but then senses a fault and shuts itself off. Most direct current faults will only spin the fans for a second and then stop.
Posted 04 December 2015 - 11:15 AM
Posted 05 December 2015 - 01:43 PM
Try the following.
Turn off the computer, not by the PSU, and unplug the computer from the receptacle.
Remove the 24 pin PSU connector from the motherboard. Place the end of a paper clip in the green wire socket of the connector, and the other end in any black wire socket. Leave this in a position in which it can't short on anything. Plug the power cord back in. If the PSU is working the LEDs and fans (except for the CPU heatsink and fan) will work.
The momentary power switch causes the motherboard to short out the green and black wires to initiate the PSU startup. If jumping out the green and black wire works, either the power switch is bad, or the motherboard is bad.
If the PSU doesn't function properly after the two wires are shorted then it's time to take a voltmeter and see if the +3v, +5v, and +12v rail voltages are reading correctly.
Family and loved ones will always be a priority in my daily life. You never know when one will leave you.
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