Fit to be TIED!

[carnageX]

I will not have money to buy either until i get paid next month. but a $15.00 tool is a lot easier to find money for than a $40-55.00 psu.

Well now you can put that $15 towards a PSU .

But yeah, check the PSU with a multimeter.

 

[XWrench3]

i have not had a chance to look at it today. but here is an interesting tidbit. NONE of (4) my usb 3.0 ports work.

 

[XWrench3]

well, i guess i am into this elbow deep now like it or not. it appears that my usb hub is scrap. my first clue was i tried to insert a flash drive to it, and nothing happened. which now that i think of it, i moved every time i removed and installed the computer into it;s "cubby. anyway, that is when i found none of the 3.0 ports worked. i shut down the computer, removed the usb cable from the back of the computer, and now i have 3.0 ports that function again. i did try another cable, and it still does not work. could the hub cause my intermittent start problem? /// so, i have my best multi meter sitting here, do i need to check every harness for power? or just the 20+4 connector?

 

[Trotter]

Faulty USB devices can cause some very weird issues sometimes.

 

[carnageX]

well, i guess i am into this elbow deep now like it or not. it appears that my usb hub is scrap. my first clue was i tried to insert a flash drive to it, and nothing happened. which now that i think of it, i moved every time i removed and installed the computer into it;s "cubby. anyway, that is when i found none of the 3.0 ports worked. i shut down the computer, removed the usb cable from the back of the computer, and now i have 3.0 ports that function again. i did try another cable, and it still does not work. could the hub cause my intermittent start problem? /// so, i have my best multi meter sitting here, do i need to check every harness for power? or just the 20+4 connector?

You'd want to check at least one of each of the harnesses to make sure they're delivering the proper voltage.

 

[XWrench3]

well, that was interesting. all of the voltages were in spec. (3.3 pins read 3.385v, the 5.0 volt pins read 5.005v, and the 12v pins read 11.95v), ** except the -12vdc (blue wire). it read -10.56vdc when connected in the normal manner (black lead of the multimeter to a ground pin) . when i reversed the polarity (red lead of the multimeter to a +12vdc power pin), it read 22.56vdc. so there is something funky going on there. but i do not know why this would stop the machine from starting in the bottom corner of my desk, and simply raising it up 3-4 feet allows it to start every time.

 

[XWrench3]

i ordered a new psu today. newegg had a 500 watt thermaltake for $19.00 after the rebate comes back. ($39.00 now) i have no idea what uses the -12vdc line. but having it read way beyond acceptable range can not be good for the computer's longevity. i certainly can not afford to slow roast a CPU to death because of a psu. even if it does not fix the intermittent doa i was experiencing.