Help after checking psu "no signal "

[sam67]

Re: Help after checking psu "no signal "

Hi Guys thanks.. I might just do what i originally set out to do and that was to recap the psu momaka you are right about the jamicon caps (TK) series..

1000uf 16v x 3
2200uf 10v x 5
2200uf 16v x 1
100uf 50v x1
2.2uf 50v x2
10uf 50v x2
0.47uf 50v x1
0.1uf 50v x1

Just need to find these caps that ship to uk. This morning i switched on the comp after plugging in the dvd/writer and it came on right away . i think once i find a source who has all the caps i can then test ESR with my meter. Forgot to say that the pc is Micro atx case so finding a decent psu over here is not that great ..Would not have gone for a matx if i had known at the time but i new nothing when i first got the pc lol.

[sam67]

Re: Help after checking psu "no signal "

Just like to say that i have another pc and not managed to get the caps yet for the problem one as i could by another psu or motherboard with the over inflated shipping charges to here in uk..$25 dollars to ship a few caps to uk ,what a ripp off.

One good thing that happened was when i removed the ram and placed them on my table trying to get a response from mobo ,when i went to put the ram back i noticed that on my 1gig ram there was an smd cap on my table so i got the magnifying glass and found where it should go and resoldered it back on the ram with my new solder station.

Plugged in comp and ram showed up and no errors so that was good news .Actually i have put this ram in this other comp that i am using.

Now the comp that i have been havin problems with will work straight away in the morning but if it is on for any length of time (full operating temp) if i turn it off it will not come straight back on only after a cooling down either a cap problem (which i'm not sure just yet) or a hdd fault.

Tried to put this psu out of this good comp into my old one (this is a liteon psu) the trouble is it don't have the right connector that fits into hdd.So i have not given up yet but will keep you updated if i find the fault.

[seanc]

Re: Help after checking psu "no signal "

Just like to say that i have another pc and not managed to get the caps yet for the problem one as i could by another psu or motherboard with the over inflated shipping charges to here in uk..$25 dollars to ship a few caps to uk ,what a ripp off.

One good thing that happened was when i removed the ram and placed them on my table trying to get a response from mobo ,when i went to put the ram back i noticed that on my 1gig ram there was an smd cap on my table so i got the magnifying glass and found where it should go and resoldered it back on the ram with my new solder station.

Plugged in comp and ram showed up and no errors so that was good news .Actually i have put this ram in this other comp that i am using.

Now the comp that i have been havin problems with will work straight away in the morning but if it is on for any length of time (full operating temp) if i turn it off it will not come straight back on only after a cooling down either a cap problem (which i'm not sure just yet) or a hdd fault.

Tried to put this psu out of this good comp into my old one (this is a liteon psu) the trouble is it don't have the right connector that fits into hdd.So i have not given up yet but will keep you updated if i find the fault.

Just get the caps from RS Components, shipping is the most reasonable I have found. £4.95 for my latest, which came in a big box and also a jiffy bag.

It's probably not the HDD causing a POST issue.

[sam67]

Re: Help after checking psu "no signal "

Just get the caps from RS Components, shipping is the most reasonable I have found. £4.95 for my latest, which came in a big box and also a jiffy bag.

It's probably not the HDD causing a POST issue.

Trouble is they don't have all the caps that i need.

[seanc]

Re: Help after checking psu "no signal "

What caps don't they have? There's nothing on your list up there that I haven't bought from RS Components myself.

[sam67]

Re: Help after checking psu "no signal "

What caps don't they have? There's nothing on your list up there that I haven't bought from RS Components myself.

Just checked and you are right lol...they don't have any 0.1 uf 63v ..so can i use a 1uf 100v instead..

Also for the the 0.47 uf 50v can i use a 1uf 50v to replace these?

All the caps that i can get are pans NHG series are these ok to replace the crappy jamicon (TK) caps in the psu ?

Much appreciated.

might also change all the mobo caps while i am at it .

cheers

[sam67]

Re: Help after checking psu "no signal "

Just checked and you are right lol...they don't have any 0.1 uf 63v ..so can i use a 1uf 100v instead..

Also for the the 0.47 uf 50v can i use a 1uf 50v to replace these?

All the caps that i can get are pans NHG series are these ok to replace the crappy jamicon (TK) caps in the psu ?

Much appreciated.

might also change all the mobo caps while i am at it .

cheers

Any one know if these caps are ok pans NHG ?

cheers

[sam67]

Re: Help after checking psu "no signal "

Cannot edit ,but just checked and i am gonna go for some smaller Diameter caps might go for Nichicon instead..is it ok to use a 1uf 100v instead of a 0.1uf 63v ..and a 1uf 50v for the 0.47 uf 50v ?

cheers

[momaka]

Re: Help after checking psu "no signal "

NHG are general purpose 105C rated caps. They might not be good enough. Either way, it's probably not worth it to bother and replace any caps under 10uF.

Also, what are the motherboard caps (brand/series)? I think I asked that on the previous page, but I don't think you replied. Those are actually more important than the PSU caps and are more likely to be the root of your problem.

[sam67]

Re: Help after checking psu "no signal "

Hi momaka,

Caps on mobo are KZG And some with a black and gold stripe but cannot see clearly as mobo still in pc ..sorry for not answering your question earlier on..The problem only really started when i opened up psu ,there was glue on some caps that i had to disturb to get the cap ratings.

What are the Al electrolytic cap,PS Nichicon caps like ? says on data sheet for switching power supplies and are 105c also.

I am gonna replace all psu/mobo caps just need to make sure i choose right..I only can find caps here in uk from RS

Thanks p.s if i do change the smaller caps is it ok with using the rating i mentioned above ?

[seanc]

Re: Help after checking psu "no signal "

1000uf 16v x 3
EEUFM1C102 | DxH: 10mm x 20mm

2200uf 10v x 5
EEUFM1A222 | DxH: 12.5mm x 20mm or EEUFC1A222L | DxH: 10mm x 30mm

2200uf 16v x 1
EEUFM1C222 | DxH: 12.5mm x 25mm or EEUFK1C222L | DxH: 10mm x 30mm

100uf 50v x1
EEUFM1H101 | DxH: 8mm x 11.5mm

2.2uf 50v x2
EEUFC1H2R2 | DxH: 5mm x 11mm

10uf 50v x2
EEUFC1H100L | DxH: 5mm x 11mm

0.47uf 50v x1
UPS1HR47MDD | DxH: 5mm x 11mm

0.1uf 50v x1
EEAGA1HR10 | DxH: 4mm x 7mm

Panasonic FM i.e EEUFM1C102 are the best ones to go for, if they'll fit. You'll have to measure the existing caps to see which ones you can squeeze in.

[stj]

Re: Help after checking psu "no signal "

farnel stock pana FK now.

[sam67]

Re: Help after checking psu "no signal "

cheers guys for all the help will let you know once the cap job is done

[sam67]

Re: Help after checking psu "no signal "

1000uf 16v x 3
EEUFM1C102 | DxH: 10mm x 20mm

2200uf 10v x 5
EEUFM1A222 | DxH: 12.5mm x 20mm or EEUFC1A222L | DxH: 10mm x 30mm

2200uf 16v x 1
EEUFM1C222 | DxH: 12.5mm x 25mm or EEUFK1C222L | DxH: 10mm x 30mm

100uf 50v x1
EEUFM1H101 | DxH: 8mm x 11.5mm

2.2uf 50v x2
EEUFC1H2R2 | DxH: 5mm x 11mm

10uf 50v x2
EEUFC1H100L | DxH: 5mm x 11mm

0.47uf 50v x1
UPS1HR47MDD | DxH: 5mm x 11mm

0.1uf 50v x1
EEAGA1HR10 | DxH: 4mm x 7mm

Panasonic FM i.e EEUFM1C102 are the best ones to go for, if they'll fit. You'll have to measure the existing caps to see which ones you can squeeze in.

Time limit here is quick Will some of these mentioned above be ok as there are a couple of different series ..does that not matter ?

Thanks again

[seanc]

Re: Help after checking psu "no signal "

All of the above will be OK, in my opinion.

Go for FM if it they will fit, otherwise you'll have to use FC or FK. I would recommend typing the capacitance and voltage into the search box just to make sure I've not missed anything better, I was fighting the urge to shovel lunch into my mouth at that time...

[sam67]

Re: Help after checking psu "no signal "

Thanks seanc it's appreciated .

[momaka]

Re: Help after checking psu "no signal "

KZG is a series from United Chemicon. While United Chemicon is a reputable Japanese cap manufacturer, their KZG series (and possibly KZJ) are known to have problems and can go bad without bulging or leaking so it's probably a good idea to change them.
Also get the names of the caps with black/gold stripes if you can. That way we can identify all of the bad caps at once so you can buy new caps in one order. And if possible, try to list their uF/voltage/diameter (in mm) and how many of each just like you did for the PSU.

Thanks p.s if i do change the smaller caps is it ok with using the rating i mentioned above ?

While some circuits might work fine with increased capacitance, others might not and you might get disastrous results. Unless you know exactly how the circuit works, it's probably not a good idea. In your case, if you substitute a 1uF cap for the 0.1uF 63v cap, that's a 10-fold increase in capacitance and is not recommended (try to stay within 20% of original value). Moreover, since your PSU is working normally, it should be sufficient to only change its output caps (i.e. the caps on the 3.3v, 5v, 12v, and 5vsb rail). All other caps can be left alone, including the big 200v ones as they almost never fail.

As far as capacitor replacements:
For the power supply, you can use either ZL from Rubycon, WX from Sanyo, FC and FM from Panasonic, PW and HE from Nichicon, or KY, KZE, LXZ, and LXY from United Chemicon.
For the motherboard, particularly for United Chemicon KZG, you can use Rubycon MBZ and MCZ, Nichicon HM, HN, and NZ, or Sanyo WG. Polymers would also work, but hopefully someone here with more experience can suggest which ones to use from those.

[sam67]

Re: Help after checking psu "no signal "

Recapped the psu with pan FM and FC but i did not replaces the 10uf and 22uf ones as i got 2.2 uf ones by mistake (silly me lol) but the problem is still there ...not sure whether to replace mobo caps or not ..I have them now at my disposal but not sure it is a cap..Cannot understand why it comes on then after it's been on for a while and then i shut it down and try and power it back up it won't come on.

Tried the psu on my other pc and it worked on that. Swapped ram from my other pc still the same..plugged my other hdd in from my working pc and it powered up but message said - A : drive error press F (can't remember now whether it was F1 and F something or another lol ) But i pressed the F summat key and it booted with no problems ,did this a few times and started every time.

It's just confusing ? could my hdd in the faulty pc be causing this issue ??

p.s the caps i removed were fine ESR wise but the capacitance was a bit higher .

[seanc]

Re: Help after checking psu "no signal "

I cannot think of a logical reason why a HDD would cause a PC not to power on and begin POST. A faulty HDD may cause it to hang during POST, but by this point the screen should be working.

The only time I have seen a HDD cause a machine to fail to power on at all, is when a diode on the circuit board on the bottom is shorted.

You might as well replace the caps on the motherboard, if it's still dead afterwards and you don't want to continue, take the caps back out and give up.

[stj]

Re: Help after checking psu "no signal "

i have a sata drive that can freeze the mobo at any point - maybe it's holding an interupt.