wierd PC "power" problem

[Poor_Prince23]

---

@ruelnov... thanks sa info.. mobo capacitor prob? u mean this is repairable? for the moment ok paman sya as long as i dont shut off my AVR... pero in the long run, will by mobo just die inexplicably?

[ruelnov]

yes, very much repairable.

u can take the risk of using ur mobo until it dies totally by not having the capacitors replaced soonest.

in some cases, the mobo is not rendered unrepairable by leaking capacitors. but in other cases, it is.

[Poor_Prince23]

thanks ruelnov... mangawat sa kog kwarta to repair the mobo... hehe mahal na? what store can you suggest that can repair this capacitor thing?

[BayouPinoy]

In my years of dabbling with system boards, I have yet to run into leaking and blown capacitors. I suggest you have look-see and locate those telltale signs of capacitors gone amok.

Bulging...
[img width=800 height=522]http://i21.photobucket.com/albums/b279/BayouPinoy/30328_4mg.jpg[/img]
Now this is some serious leaking here...
[img width=270 height=172]http://i21.photobucket.com/albums/b279/BayouPinoy/capacitor.jpg[/img]

From wikipidea http://en.wikipedia.org/wiki/Capacitor_Plague:
The most common way of identifying capacitors failing due to this cause is physical deformations:

Bulging of the vent on the top of the capacitor
Sitting crooked on the motherboard as the bottom rubber plug is pushed out
Electrolyte (visible as brown gunk) leaked onto the motherboard from the base of the capacitor
Venting from the top of the capacitor, visible as brown deposits, or a visible hole in the vent
As the capacitor ages, its capacitance decreases while its equivalent series resistance (ESR) increases. When this happens, the capacitors no longer adequately serve their purpose of filtering the voltages on the motherboard, and system instability results. Some common symptoms are:

Not turning on all the time; having to hit reset or try turning the computer on again
Instabilities (hangs, BSODs, kernel panics, etc), especially ones which get progressively worse with time
Vcore or other system voltages fluctuating or going out of range, possibly with an increase in CPU temperature as the core voltage rises
Memory errors, especially ones that get more frequent with time
Spontaneously rebooting
In case of onboard video cards, unstable image in some videomodes
Failing to complete the POST, or rebooting before it is completed
Never starting the POST; fans spin but the system appears dead
Unlike the physical signs, which are conclusive evidence the capacitors are failing, many of the operational signs may be caused by other factors, such as a failing power supply, dust clogging a fan, bad RAM, or other hardware problems. Instability once the operating system has loaded, especially on Microsoft platforms, may indicate a software problem and not a hardware problem at all. If any of these symptoms are experienced, removing the system's case, and inspecting the capacitors, especially those around the CPU, may immediately identify capacitors as the cause. If there are no physical signs, an oscilloscope may be used to examine the voltage on the capacitors, with excessive ripple voltage being a sign th

[ruelnov]

thanks ruelnov... mangawat sa kog kwarta to repair the mobo... hehe mahal na? what store can you suggest that can repair this capacitor thing?

-------------------------------------------------------------------------

FYI, I'm specialized in fixing dead/defective mobos and hard disks.

In case u couldn't find somebody else who can replace ur defective capacitors, just refer to this thread for more details:

https://www.istorya.net/forums/index.php?topic=25112.0

[[DSX]]

]
i had the same issue on my TASK PSU, it now even has a very sharp pitch.. but when system is on.. the sound disappears. i had to cycle the PSU power switch 2-3 times before the system powers up. Tried using orig TASK PSU that came with the casing, worked fine. am sure it has something to do with the PSU

woah...so m not d only one havn dis ish...minus d sound ha...hehe....ye its tru bro...were better off d task oem psus frm our casings...hehe...

hehe "glad" to know i'm not the only one too. i thought this was an isolated case. my "singing" task psu is 350watts while the orig TASK PSU is only 300. this may be an issue with some 350watt task psu's. right now I'm still using the 350watts psu. I just had to put up with it and try cycling psu switch until it works.