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Power supply dying?

C

crowdx

Member
Hi,
well today I powered down my box, when I tried to power it back up (cold from power switched off) it refused to boot. Unplugged drives and fans and FINALLY it booted. With it still plugged in I got everything working. I then installed MBM to check voltages and the pic in the link below shows the voltages I am getting.
Is only a year and a half old case with an Antec TruePower 430watt PSU.
Any input welcome
Patrick
Motherboard Monitor Dashboard Pic
 
why don't you just tell us the voltages, your link isn't working even after taking out the mulitple http://

did you plug in and unplug the ATX connector a lot? That'll wear down the connection.
 
Seems it is the -5v which is the problem, with the Antec it was at -1.27, I replaced the PSU with a new Enermax 430watt noisetaker PSU and that reading is now at -5.38, seems a big difference. Also the Enermax is reading higher with all the other voltages also. The 2.61 seems to be the memory voltage (MBM obviously assigned it incorrectly).
Hopefully the new PSU will have solved the problem. Other issues over the last few weeks have been loss of secondary ide channel and losing my DVD burner (6 month old plextor). Was thinking maybe the board itself was having issues but when I shut the machine down and switched it off at the PSU and then tried to restart it today with no luck it all seemed to point to the PSU, particularly when I disconnected most of the hardware and then it started, seems it could not produce enough power to power everything from a cold boot.
Patrick
 
I had a similar problem with my Antec TruePower 430. +5V rail was out of spec and the computer wouldn't boot most of the time cause hard drives draw a lot more power while spinning up than they do once they're running. Once I got it running it seemed fine, but if I had to cold boot it was a PITA to get it to work.
 
Yup,, sounds exactly like my problem BUT it seemed to get worse the last few weeks, while working hard drives were vanishing and same with the DVD burner. I have 5 fans, 3 hard drives, dvd burner, floppy and Live drive all on this machine.
Funny thing is I have another box with same board and also an Antec PSU and that same 5v reading is the same on it,,, is this an Antec bug? The other machine is working as a home theater server for SageTV and runs 24/7 for months with no issues.
I ran Prime95 last night and it ran for 11 hours BUT it seemed like it did very little calculations (only 5 tests ran). Gonna reboot and see what happens again.
Patrick
 
MBM 5 does not always give accurate readings for the power supply. The bios "pc health status" section is what I go by.
 
Below are the reading from the BIOS with new PSU
Vdd(V) 1.63
Vcore (V) 1.66
Vdimm (V) 2.72
+5 V 5.08
+12 V 11.97
Vagp 1.52
-5 V 0.00
VBAT 3.18
5VSB (V) 5.01

Wondering why the -5V is 0 ?
Patrick
 
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