Hello all. 
I need some advice on "moody" MS Industrial "GOLD MS-400ATX P4" PSU. It is about 7 years old, bought second-hand so I don't know it's history, bottom intake (12cm fan), ratings and pictures below.
I've tried it with my system (67W TDP Athlon64 with low consumption GPU (Radeon HD4350), 2x1 GB DDR400 ram, 80GB IDE hard drive and 3 mostly idle IDE optical units). It worked fine for about a day and then the computer started switching off by itself in irregular intervals (in use or even when booting - it behaves as if a power supply cord was pulled off). 12V rail sags to about 11.5V in use. Another PSU (KME 350W) runs that system fine 24/7 sagging to about 11.7V, but it has 16A on 12V rail instead of 14A of MS Industrial.
In another system which presumably puts load on different rails (it's the older 66W TDP Pentium4 with AGP GeForce4 MX440, 2x512 MB DDR400 ram, 12GB IDE hard drive, idle CD-ROM unit) the PSU works well and mostly has no stability issues in use. But, the only exception is when the monitor (17" LG T710BH CRT unit) is switched on - the large starting current pulled by demagnetization coil causes a minor voltage sag on all nearby devices, and the computer (sort of) freezes then. It doesn't switch off and doesn't reboot; it remains on but HDD and CD-ROM activity LEDs light up constantly for a few seconds, the fans slow down for a short while (judging by the sound), and the system remains somewhat frozen (no video output/signal from that point on, no ethernet traffic etc.).
No capacitors are obviously bad, swollen or leaked inside the PSU. Input ones are HEC 470u 200V, the output ones are JEE (2200u 16V (I presume for 12V rail), the others are a pair of 1000u 10V and a pair of 2200u 10V). No unusual sounds, smells or obvious overheating. One of HEC input capacitors seems somewhat different - not exactly swollen (it is flat on top) but not perfectly "flat" between the three ridges on top surface (it might be visible on photos) - though I've seen many caps looking like that and working just fine, so I came to a conclusion that it could be the metal-forming imperfection. The plug on the bottom of that cap is not forced out either, and there is no evidence of leaking below. It is the one with red marking on top.
Thanks in advance for any kind of help.
Pictures:
http://postimg.org/image/4s139x6it/
http://postimg.org/image/5iukdjqdr/
http://postimg.org/image/m6eg2rvpx/
http://postimg.org/image/mua7a2sod/
I need some advice on "moody" MS Industrial "GOLD MS-400ATX P4" PSU. It is about 7 years old, bought second-hand so I don't know it's history, bottom intake (12cm fan), ratings and pictures below.
I've tried it with my system (67W TDP Athlon64 with low consumption GPU (Radeon HD4350), 2x1 GB DDR400 ram, 80GB IDE hard drive and 3 mostly idle IDE optical units). It worked fine for about a day and then the computer started switching off by itself in irregular intervals (in use or even when booting - it behaves as if a power supply cord was pulled off). 12V rail sags to about 11.5V in use. Another PSU (KME 350W) runs that system fine 24/7 sagging to about 11.7V, but it has 16A on 12V rail instead of 14A of MS Industrial.
In another system which presumably puts load on different rails (it's the older 66W TDP Pentium4 with AGP GeForce4 MX440, 2x512 MB DDR400 ram, 12GB IDE hard drive, idle CD-ROM unit) the PSU works well and mostly has no stability issues in use. But, the only exception is when the monitor (17" LG T710BH CRT unit) is switched on - the large starting current pulled by demagnetization coil causes a minor voltage sag on all nearby devices, and the computer (sort of) freezes then. It doesn't switch off and doesn't reboot; it remains on but HDD and CD-ROM activity LEDs light up constantly for a few seconds, the fans slow down for a short while (judging by the sound), and the system remains somewhat frozen (no video output/signal from that point on, no ethernet traffic etc.).
No capacitors are obviously bad, swollen or leaked inside the PSU. Input ones are HEC 470u 200V, the output ones are JEE (2200u 16V (I presume for 12V rail), the others are a pair of 1000u 10V and a pair of 2200u 10V). No unusual sounds, smells or obvious overheating. One of HEC input capacitors seems somewhat different - not exactly swollen (it is flat on top) but not perfectly "flat" between the three ridges on top surface (it might be visible on photos) - though I've seen many caps looking like that and working just fine, so I came to a conclusion that it could be the metal-forming imperfection. The plug on the bottom of that cap is not forced out either, and there is no evidence of leaking below. It is the one with red marking on top.
Thanks in advance for any kind of help.
Pictures:
http://postimg.org/image/4s139x6it/
http://postimg.org/image/5iukdjqdr/
http://postimg.org/image/m6eg2rvpx/
http://postimg.org/image/mua7a2sod/
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