Failed desktop PSU

HarryM1BYT · 19th March 2016, 18:26

My old faithful desktop, a Medion MD8800's PSU, failed a while ago and I have just got a rounduit.

I used to be familiar with PC's and their parts, but now I am way out of touch, so I'm just wondering is it is a standard part or something custom for this model of desktop?

It is marked FSP Group Inc.Model No FSP400-60DN

Has a 5" fan in the bottom as it is mounted. 400W

As output, according to the label it has...

+3.3v 15A; +5v 21A; +12.1v 20A; +5v sb 2.5A; -12v 0.5A; +12.2v 16A

3x old style hard disk / DVD/CD type power plugs on one cable

2x SATA HD power plugs on one cable.

1x floppy type power plug

1x Motherboard power plug 20 way in 2 rows of 10, with one unused.

1x 6 way plug in 2 rows of 3 marked P9 containing 3x yellows + 3x black wires.

1x 4 way plug in 2 rows of 2 with 2x yellow/black and 2x black wires.

At the rear it just has a 240v input socket and a power switch.

I am also confused by how a modern PC powers up and down, it just has a push button on the front of the PC, to switch it on and off. I assume the motherboard tells the PSU to turn itself on and off?

Should I be able to test it as I used to with old PSU's by connecting a load like a HD and switching the mains on, or is there something more involved to test it?

Thanks for any help.

SideValve · 19th March 2016, 19:29

That usually fail completely or not so if anything, disk, m'board, fan show signs of life its probably ok.
If none are showing life its time to look on ebay...

HarryM1BYT · 19th March 2016, 20:30

The fan is a variable speed, runs when it is needed, but the system used to always run its fans including the PSU fan briefly if the 240v was applied. Now it doesn't do that.

The PC also has a display, which showed the time even when the system was shut down, assuming it had a mains supply. The display is also blank.

I have not been able to find a PSU on ebay for my particular system, which is why I am wondering if the PSU might be a standard one or unique for my system.

maxxpump · 19th March 2016, 20:35

Ebay is your best option and hopefully you haven't burnt out the motherboard ad CPU and peripherals when the power supply went!

Jakg · 19th March 2016, 20:45

It's probably a standard PSU - if it's got an ATX connector on it, it 99% is.

The motherboard tells the PSU to switch on - you can replicate this by shorting two pins on the ATX connector (can't remember which).

mbonwick · 19th March 2016, 20:52

Quote:

Originally Posted by HarryM1BYT

I used to be familiar with PC's and their parts, but now I am way out of touch, so I'm just wondering is it is a standard part or something custom for this model of desktop?

It is marked FSP Group Inc.Model No FSP400-60DN

A quick google shows it to be a standard ATX PSU, so getting a replacement shouldn't be a problem.

Depending what components you actually (plan to) have attached to it, I have a slightly less powerful FSP250 (250W) that I've been trying to sell without success on eBay...

HarryM1BYT · 19th March 2016, 21:12

Quote:

Originally Posted by mbonwick

A quick google shows it to be a standard ATX PSU, so getting a replacement shouldn't be a problem.

Depending what components you actually (plan to) have attached to it, I have a slightly less powerful FSP250 (250W) that I've been trying to sell without success on eBay...

It is quite a big system, 3x HD's, DVD, CD, plus a few external bits it supplies, so I wouldn't want to reduce the PSU wattage any, but thanks..

HarryM1BYT · 19th March 2016, 22:32

Quote:

Originally Posted by Jakg

The motherboard tells the PSU to switch on - you can replicate this by shorting two pins on the ATX connector (can't remember which).

I (have suddenly) had to learn a lot about ATX PSU's

- thanks.

https://www.techpowerup.com/articles/other/22

chipsceola · 19th March 2016, 23:55

reliable supplier top quality parts and service always

HarryM1BYT · 20th March 2016, 08:04

Confirmed - the PSU is at fault...

I can get it to start and run its cooling fan at very low speed (linking those above pins), I can have it run a 1 HD load, but if I add any more loads it immediately dies.

It does seem to be a standard ATX PSU, but it does need to have the correct output plugs to be of any use to me.

19th March 2016, 18:26	#1
HarryM1BYT This is my second home 75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD Join Date: May 2010 Location: Leeds Posts: 17,273 Thanks: 2,160 Thanked 2,061 Times in 1,586 Posts	Failed desktop PSU My old faithful desktop, a Medion MD8800's PSU, failed a while ago and I have just got a rounduit. I used to be familiar with PC's and their parts, but now I am way out of touch, so I'm just wondering is it is a standard part or something custom for this model of desktop? It is marked FSP Group Inc.Model No FSP400-60DN Has a 5" fan in the bottom as it is mounted. 400W As output, according to the label it has... +3.3v 15A; +5v 21A; +12.1v 20A; +5v sb 2.5A; -12v 0.5A; +12.2v 16A 3x old style hard disk / DVD/CD type power plugs on one cable 2x SATA HD power plugs on one cable. 1x floppy type power plug 1x Motherboard power plug 20 way in 2 rows of 10, with one unused. 1x 6 way plug in 2 rows of 3 marked P9 containing 3x yellows + 3x black wires. 1x 4 way plug in 2 rows of 2 with 2x yellow/black and 2x black wires. At the rear it just has a 240v input socket and a power switch. I am also confused by how a modern PC powers up and down, it just has a push button on the front of the PC, to switch it on and off. I assume the motherboard tells the PSU to turn itself on and off? Should I be able to test it as I used to with old PSU's by connecting a load like a HD and switching the mains on, or is there something more involved to test it? Thanks for any help. __________________ Harry How To's and items I offer for free, or just to cover the cost of my expenses... http://www.the75andztclub.co.uk/foru...40#post1764540 Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing. I've taken a vow of poverty. To annoy me, send money. Last edited by HarryM1BYT; 19th March 2016 at 18:44..

19th March 2016, 19:29	#2
SideValve Gets stuck in Rover 75 Saloon Join Date: Apr 2012 Location: Oxford Posts: 767 Thanks: 141 Thanked 204 Times in 141 Posts	That usually fail completely or not so if anything, disk, m'board, fan show signs of life its probably ok. If none are showing life its time to look on ebay... __________________ The Story So Far: Austin A35, Morris Oxford, Triumph Herald, Mini 850, Mini 1000, Austin Allegro, MG Midget, MGB GT, Rover SD1 2600, Austin Maxi, Rover 200, Rover 825, Rover 800, Bedford TK, Range Rover 3.9 efi, Rover 400, Rover 100, MGF, Rover 25, Rover 75 1.8, Rover 75 Connoisseur SE 2.0 V6, MGF 1.8i, Rover 75 Connoisseur 2.0 V6 Auto, Morris Eight Series E, Morris Minor 1275.

19th March 2016, 20:30	#3
HarryM1BYT This is my second home 75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD Join Date: May 2010 Location: Leeds Posts: 17,273 Thanks: 2,160 Thanked 2,061 Times in 1,586 Posts	The fan is a variable speed, runs when it is needed, but the system used to always run its fans including the PSU fan briefly if the 240v was applied. Now it doesn't do that. The PC also has a display, which showed the time even when the system was shut down, assuming it had a mains supply. The display is also blank. I have not been able to find a PSU on ebay for my particular system, which is why I am wondering if the PSU might be a standard one or unique for my system. __________________ Harry How To's and items I offer for free, or just to cover the cost of my expenses... http://www.the75andztclub.co.uk/foru...40#post1764540 Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing. I've taken a vow of poverty. To annoy me, send money.

19th March 2016, 20:35	#4
maxxpump Posted a thing or two Rover 75 CDT Join Date: Aug 2014 Location: Brighton Posts: 1,786 Thanks: 215 Thanked 244 Times in 205 Posts	Ebay is your best option and hopefully you haven't burnt out the motherboard ad CPU and peripherals when the power supply went! __________________ Mods done: 160 upgrade, EGR bypass, Viton "O" rings, Fitted 16" unions, cleaned manifold, uprated air filter, fog lights, better bulbs, upgraded ICE and full speaker set up.

19th March 2016, 23:55	#9
chipsceola This is my second home Jaguar XF 3.0D Join Date: Nov 2010 Location: Southampton Posts: 4,364 Thanks: 119 Thanked 509 Times in 426 Posts	reliable supplier top quality parts and service always __________________ Chips

19th March 2016, 20:45	#5
Jakg This is my second home N/A Join Date: Feb 2010 Location: Suffolk Posts: 6,867 Thanks: 0 Thanked 397 Times in 302 Posts	It's probably a standard PSU - if it's got an ATX connector on it, it 99% is. The motherboard tells the PSU to switch on - you can replicate this by shorting two pins on the ATX connector (can't remember which).

20th March 2016, 08:04	#10
HarryM1BYT This is my second home 75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD Join Date: May 2010 Location: Leeds Posts: 17,273 Thanks: 2,160 Thanked 2,061 Times in 1,586 Posts	Confirmed - the PSU is at fault... I can get it to start and run its cooling fan at very low speed (linking those above pins), I can have it run a 1 HD load, but if I add any more loads it immediately dies. It does seem to be a standard ATX PSU, but it does need to have the correct output plugs to be of any use to me. __________________ Harry How To's and items I offer for free, or just to cover the cost of my expenses... http://www.the75andztclub.co.uk/foru...40#post1764540 Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing. I've taken a vow of poverty. To annoy me, send money.

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