psu help

daz300 · 16-09-2014, 18:21

hello, my pc has just died and i think it is the psu as it will not turn on at all i have changed all the fuses , i have looked around and you can not buy the same psu any more only on ebay . i will add a pic of it can any one tell me of the best one to get to replace it , thank you for any help i get daz300

Ken W · 16-09-2014, 19:10

Quote:

Originally Posted by daz300

hello, my pc has just died and i think it is the psu as it will not turn on at all i have changed all the fuses , i have looked around and you can not buy the same psu any more only on ebay . i will add a pic of it can any one tell me of the best one to get to replace it , thank you for any help i get daz300

It dose not have be the same make as long as the output power is sufficient, there are plenty of sources for a 550 watt, take a look at Novatech. http://www.novatech.co.uk/products/c...powersupplies/

Taf · 16-09-2014, 19:49

Most are a standard size, though some builders use odd shaped ones (e.g. Stone Computers).

A quick check that might help you:Turn the PC on at the wall, and see if your optical mouse lights up when moved. The mouse uses the "always on " 5v supply that the PC uses to switch on via on the ON switch. If it does light up, the ON switch might be faulty. If it doesn't light up at all then I would go for a new PSU as you have already decided.

I use a PSU tester I got from ebay to quickly diagnose PSU faults as they are a right PITA and not worth the risk of opening..... they bite!

PSU testers only cost about £3

daz300 · 16-09-2014, 20:53

thank you for all the replys ,

the pc is dead is is not turing on in any way at all ,taf

---------- Post added at 21:53 ---------- Previous post was at 21:51 ----------

Quote:

Originally Posted by Ken W

It dose not have be the same make as long as the output power is sufficient, there are plenty of sources for a 550 watt, take a look at Novatech. http://www.novatech.co.uk/products/c...powersupplies/

so as long as i get a 550w psu i will be ok , and will it have the same plugs ?

thnks daz

Ken W · 16-09-2014, 21:42

Quote:

Originally Posted by daz300

thank you for all the replys , the pc is dead is is not turing on in any way at all ,taf ---------- Post added at 21:53 ---------- Previous post was at 21:51 ---------- so as long as i get a 550w psu i will be ok , and will it have the same plugs ? thnks daz

Yes

Taf · 17-09-2014, 15:29

I know this is a long shot, but I have seen it happen,... is the switch on the back of the PSU on?

adzii_nufc · 17-09-2014, 15:51

Test the PSU with a paperclip.

Ken W · 17-09-2014, 16:37

Quote:

Originally Posted by Taf

I know this is a long shot, but I have seen it happen,... is the switch on the back of the PSU on?

Good point.

madmax215 · 17-09-2014, 16:42

Ignor adzii nufc's advise unless you want to get killed. Have you checked the internal fuse, you will need to open the power supply up and look near the input socket there should be a fuse there, they are usally fast blow fuses that you can pick up from RS Comonents, Failing that check the caps and see if the bridge rectifier has not blown.

cookie_365 · 17-09-2014, 16:42

Quote:

Originally Posted by adzii_nufc

Test the PSU with a paperclip.

If the OP needs to ask whether another brand of PSU is going to be OK, then asking them to 'test' it with a paperclip isn't going to end well

Edit - madmax215 beat me to it

qasdfdsaq · 17-09-2014, 16:50

Quote:

Originally Posted by madmax215

Ignor adzii nufc's advise unless you want to get killed. Have you checked the internal fuse, you will need to open the power supply up and look near the input socket there should be a fuse there, they are usally fast blow fuses that you can pick up from RS Comonents, Failing that check the caps and see if the bridge rectifier has not blown.

No way is anybody going to kill themselves on 3v.

madmax215 · 17-09-2014, 16:53

You may be right but would you do it then. also if it does work you might blow the transformer, which means you will need to buy a new PSU.

adzii_nufc · 17-09-2014, 17:11

Quote:

Originally Posted by madmax215

You may be right but would you do it then. also if it does work you might blow the transformer, which means you will need to buy a new PSU.

I would and have many times. It works fine and always has. It's common knowledge that you can trick a PSU into powering up with a paperclip, I'm not telling him to put his tongue in a plug socket

http://m.wikihow.com/Check-a-Power-Supply

qasdfdsaq · 17-09-2014, 17:15

Quote:

Originally Posted by adzii_nufc

I would and have many times. It works fine and always has. It's common knowledge that you can trick a PSU into powering up with a paperclip, I'm not telling him to put his tongue in a plug socket http://m.wikihow.com/Check-a-Power-Supply

Agreed. I even have some PSUs permanently wired with a paperclip.

heero_yuy · 17-09-2014, 17:29

Often a high value starting resistor goes open circuit. Unless you know your switchers best to get a new unit. Beware switching supplies can kill!