Author Topic: PC Power supply nag-sha-shutdown after a few hours (Read 3407 times)

flatpack · « **on:** January 18, 2008, 03:58:42 PM »

yung isa ko kasing power supply normal naman lahat ng voltage rails pero after mga 3 hours na paggamit bigla na lang nawawalan ng power. ano kaya problema nito?

Philippine Electronics Forum · « **on:** January 18, 2008, 03:58:42 PM »

Shey · « **Reply #1 on:** January 18, 2008, 08:16:40 PM »

Wayback in 1998 naka-experience ako ng PC power supply na ganyan. Check mo yung starting resistor. Ang typical na value niya ay 680K at nakakabit yan dun sa transistor na connected sa maliit na switching transformer. Usually, kasama niya din sa circuit yung optocoupler.

Pag-check mo sa ohmmeter, it would appear na ok ang value ng resistor pero palitan mo yan kasi intermittent device na yan. Pag-uminit na bigla na lang yan mag-oopen circuit tapos pag lumamig na babalik na naman sa normal value.

Philippine Electronics Forum · « **Reply #1 on:** January 18, 2008, 08:16:40 PM »

jumpstart · « **Reply #2 on:** January 21, 2008, 07:38:05 AM »

madalas mangyayari mga ganyan ... lalu na yung kasama/bundled sa case.

Philippine Electronics Forum · « **Reply #2 on:** January 21, 2008, 07:38:05 AM »

Shey · « **Reply #3 on:** January 21, 2008, 07:41:26 AM »

yung nagloko na PSU ko bundled talaga yun sa casing.. made in thailand na PSU..

Philippine Electronics Forum · « **Reply #3 on:** January 21, 2008, 07:41:26 AM »

stcboy · « **Reply #4 on:** January 21, 2008, 11:29:28 AM »

pwede rin na cold solder sa parts.

Philippine Electronics Forum · « **Reply #4 on:** January 21, 2008, 11:29:28 AM »

jumpstart · « **Reply #5 on:** January 21, 2008, 12:13:27 PM »

Quote from: stcboy on January 21, 2008, 11:29:28 AM

pwede rin na cold solder sa parts.

I just remeber one time when I "dissected" these "generic" power supplies (PC)... dinikit lang ng GLUE STICK ang wires at nilagyan ng tape!

anthonydp · « **Reply #6 on:** March 03, 2008, 12:33:17 PM »

this is an already old thread pero contribute lang ako...

if the PSU is atx type, check the electrolytic filter capacitors of the standby supply. They might appear as bloated or leaking already.

Since this capacitors are always exposed to high frequency even when your PC is "turned-off" but with the AC cable still connected on the AC outlet, their electrolytes tend to dry up rather quickly (especially if they are not certified for switching circuits). When they dried up so much, the "Power Good" signal from the psu may become unstable resulting to the powering down of the PC.

hth.

Red Sonjah · « **Reply #7 on:** March 04, 2008, 11:03:12 AM »

before you check the component of power supply try mo mona icheck mga software mo sa pc. nangyari narin sakin yan sira lang pala os ng pc possible rin na umiinit ng husto cpu, linisin mo muna memory yan madalas magkaroon ng dumi lalo na pin nya. kaya minsa lagi nagrerestart at shutdown pati yung v-card if hindi ka nakabuilt-in. openyon lang. kapag ok yun check muna hardware

duldog · « **Reply #8 on:** March 12, 2008, 08:00:11 PM »

bossing bago ka magtrabaho sa pc psupply mo at kapag nabuksan mo na make sure na discharged ung two filter caps na malalaki para di ka makurot

mArKhAo · « **Reply #9 on:** March 12, 2008, 08:17:24 PM »

hmmm. . "intermittent" hehe... ganun pla un... nka encounter n dn aq ng ganito...

dagdag kaalaman sa pag rerepair,,, ok ah.

snider · « **Reply #10 on:** March 22, 2008, 04:51:01 PM »

baka coldsolder lang po yan,pwede rin sa capasitor kasi naka encounter napo ako nyan

michael256 · « **Reply #11 on:** April 06, 2008, 12:59:59 AM »

hmm sure k ba na power supply mo kosa n nag turn off

baka nmn sa computer mo lng software prob..??
try mo I-on power supply mo w/o ur pc
observe mo qng pag turn off xa...^_^

para sa wires..
http://en.wikipedia.org/wiki/ATX

pag hindi try mo re4rmat pc mo...
baka my virus lng...

2malness · « **Reply #12 on:** November 22, 2009, 12:07:00 PM »

w0w bagong terminlogies ^,^

boki · « **Reply #13 on:** November 22, 2009, 01:10:53 PM »

Assuming PSU is giving the right voltage/s....

> better check the heatsink of the main CPU, once it is not properly attached, CPU will surely fail then automatically shuts to minimize further damage to the system

> memory issues is out of the question, for the system is already booted up, it just so happens that it shuts off by itself...

> if the video card is the culprit, surely it won't give up display literally.

shadowstriker07 · « **Reply #14 on:** November 22, 2009, 11:45:14 PM »

Well if its not on the Hardware better check the software....

well kung after 2-3 hrs nag shashutdown... tapos kapg ni-On mo ulet di na nagpapower,,,, harware po yan.... pero pag bumalik sa software yan....

jfar223344 · « **Reply #15 on:** January 01, 2011, 01:25:17 AM »

Check mo na rin processor mo kung exactly nakakabit sa cpu heatsink pag uminit ng husto kusang nagsa shutdown yan at naapektuhan ang psu sobrang init. Pwede rin sa psu mo ang probz may mga bloated caps at leakage.

Sharingan · « **Reply #16 on:** April 10, 2011, 11:59:33 AM »

mga tol try nyo pag troubleshoot ko sa power supply para malaman nyo kung motherboard baord ba or powersupply ang sira.

1. baklasin m0o yung power supply sa system unit
2. buksan mo ang power supply (kung fuse ang sira test mo sa x1 yung fuse na nakakbet kung may palo pag wala syang palo sa tester sira fuse.
3.test mo yung power supply kung mamatay sya. i mean yung fan nya kung mamatay sa pag ikot.
4. ganito yan hanapin mo yung rekta nang switch nang power supply kadalasan yun 3 at saka pin kulay nun black saka green. pag dikitin nyo yung dalawa at kusang iikot uyung fan nun.
5. obserbahan nang tatlong oras kung mamatay pa sya kung namatay pa sya 100 % power supply ang sira.

sana makatulong =)

your most RIDICULOUS man :) · « **Reply #17 on:** April 10, 2011, 12:12:47 PM »

x13r_kit_0 · « **Reply #18 on:** April 10, 2011, 12:16:44 PM »

natry ba sa ibang pc ts.kung confirm na power supply ang sira.,andyan na mga suggestions,,ecaps

Engr. Dacuycoy · « **Reply #19 on:** April 10, 2011, 12:37:14 PM »

January 18, 2008 pa ito

baka bago na pc ng ts

Philippine Electronics Forum · « **Reply #19 on:** April 10, 2011, 12:37:14 PM »

Author Topic: PC Power supply nag-sha-shutdown after a few hours (Read 3407 times)

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