Re: MS Industrial 400W PSU issues

Standby voltage without load is 5.09V, measured with a multimeter. Sadly, I couldn't keep the PSU running while disconnected from the board - I just managed to switch it on by pulling PS_ON to ground, but after a split second it would stop running - I probably need to do something else there too, but I hope this measurement might prove useful.

@goodpsusearch It is a low power PSU, no doubt. Ampere ratings on 3.3 and 5 volt lines are about half of those of my KME 350W. God knows what the number 400 means on this one, when even the sticker...

Re: MS Industrial 400W PSU issues

@stj Yes, it is probably the standby indicator. In my system powered by KME 350W 5VCCH holds steady at 5.03V.

The 5V rail of that thing might be overloaded, and 12V remaining stable as it sees little or no load at all. The situation was quite different in my system - 12V sagged to 11.5V with that PSU.

Do you (or anyone else) recognize the layout and components from the pictures - I guess it is some generic brand? Perhaps I could then read more about that model's flaws, failures and construction... No caps seem strange...

Re: MS Industrial 400W PSU issues

@stj

Just tested it for a few minutes with Hardware monitor:
3.3V : 3.22 to 3.33V
5V : 4.30 to 4.35V
12V : 12.03 to 12.22V
5V VCCH : 1.13 to 5.67V

Confirmed - during EVERY CRT monitor switch-on (demagnetization coil current surge) the system "freezes" and shuts off video signal, often even with the hard drive parking its heads and spinning down. Once the system even rebooted as a result of heavy HDD use, but that never happened so far (the system is in use for over a month).

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...

Re: New Members - please post your introductions here

Hello
An electronic and computer enthusiast here from Serbia. Mostly a hobbyist in both field, with interests in basic electronics, multimedia, video, energy efficiency, etc. Keeps his computers running good and long through careful choice in components and by doing small service tasks himself. Registered here mostly for some in-depth help about some more advanced repairs.