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Bulgging capacitors on my GT5058 mother board how do I find another mother board?

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Had the same problem
Bulging capacitor near the power connector.
Found the capacitor on a junk MB desoldered it and replaced on the MB.
Running fine a year later.
Give it a shot It is not that hard. Get yourself a desoldering pump and a good fine pointed iron.
It can be done...
Dave

Posted on Jan 05, 2011

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Posted on Jan 02, 2017

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Try replacing all the bulging caps you find and see if that does the trick. If you have a capacitor tester you might want to check the other caps in the proximity of the ones that are leaking. Sometimes a capacitor can go bad with no outward sign of its demise.

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The most likely solution is to replace any Capacitors that have blown in the onboard power circuit. Look for a Capacitor that has got a very bulging top in the region of the power connector.

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When turn on tv, blank screen and power light is blue and is only on for a second and goes away. Could it be mother board?


There are two possible problem of your tv, first is the mother board your right and the second is the power supply. If there is a bulge up or leaky capacitor in the power supply it will cause the mother board to malfunction, this bad capacitor produces low and unfiltered dc output it is producing current but not sufficient to power up your unit if you remove the back cover of your tv try to look those capacitor and replace it, the bulge up is that the top is not perfectly flat like the others and the leaky capacitor has a wet mark at the bottom of the capacitor. but remember when you replace the capacitor you should observe the proper position because it has a polarity. Note unplug the unit before removing the back cover, feel free to send feed back good day and best regards.

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1 Answer

My mother has a 20"


Hi,
The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.
The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.
All these can be checked on the power supply board.
But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.
The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)
You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.
What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).
You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress.
Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.
If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.
I hope this helps.
Regards.

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1 Answer

Dell Optiplex 745 having all kinds of problems getting blue screens, but I can reboot and it works fine. I installed a new hard drive on this computer. I am not able to install the update for windows xp...


Hello,

The main failure on the Optiplex 745 units are capacitors on the motherboard. When they fail you can get all sorts of strange problems - no boot, blue screen issues, no video or distorted video. Open your machine up and look for bulging capacitors on the board. Here is a link to a guide showing what to look for on the motherboard to determine if your problem is capacitor related or not.

http://www.ccl-la.com/blog/index.php/dell-optiplex-745-repair/

If you do find bulging capacitors on the motherboard then more than likely that will be your problem. You can replace the capacitors and your board will be as good as new.

I hope this helps, if so please rate my solution.

BuddyMc

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remove the smps connector to the motherbard and short the green and black with a papper clip and see if the smps is working fine and also inspect the mother board for any bulging capacitor or leaky capacitorif youhave leaky or bulging capacitor change them

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I have a samsung pdp42 built in 2002 it seems to overheat? and tuen off on its own. It may work for three hours or as little as 15 minutes. several of the capacitors have plastic ends that are bulging but...


Yes, I can tell you that when the capacitors start bulging the you will need to replace the device. This is a sign that the capacitors are starting to fail. Now if you can put in a fan somewhere that will kept the heat down then you might be able to use it a little longer. You have got to get the heat away from the mother board.

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1 Answer

Lightning Damage


Hi, if this is lightning damage then unfortunately you are up for a new router and pray that your mother board has survived.
To check motherboard, open case use a torch and study the capacitors in side. these are round objects that stand out from the board in rows of up to 6. if any of them show signs of bulging out the top or bottom then your mother board is also most certainly damaged and will need replacing.
Regards mistyman

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