Need to verify if my X-200/12V power supply is good. Have checked incoming fusr good. Circuit boards show no visible signs of damage. Need a wiring diagram of what wires to jump togather to start power supply. I want to rule out the mother board being bad and that the power supply is good.

SOURCE: Humming in woofer

A wiring diagram could be difficult if not impossible to find but you should'nt need one anyway.

You're correct in saying it's most likely a filter cap in the power supply, of which would be a larger electrolytic cap that may even display signs of being faulty. Look for leakage of crusty brown stuff on the end where the rubber seal and leads are, or possibly the other end, shrunken plastic skin, bulging or other signs of over heating. Replace any you find that have visual signs of failure.

Sometimes you cannot tell by looking if a cap is bad but it would'nt cost that much to replace the larger ones in there anyway. Open up the unit, write down the electrolytic cap values
you find, go buy replacements and replace em.

You're hearing 60 cycle hum so the filter(s) you need to replace will be quite large physically and have a fairly high micro farad value....such as 1000, 1500 or 2200.

When buying replacements, get as close to the micro farad rating as possible and buy at least the same voltage rating, or higher. Be sure to solder them in correctly, there is a negative and positive lead and you dont want to get those reversed or....
BOOM!

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SOURCE: Power Surge damage. Suggestions on which part to replace.

I would start looking at the power supply, it's usually a separate board where the a/c line plugs into. In many cases i have seen that the problem you described is from a damaged power supply, sounds like something is shorting causing the power supply to continuously come on and off. I would first check the capictors to see if any of them have blown, usually cylinder looking and sometimes you'll see an X or a K at the top of the cylinder, if it's blown then the top will be bulging out instead of being flat. If all those look good then there is probably a short somewhere else like in one of the transistors, if so you'd be best to just find another power supply board to replace.

SOURCE: NEED SCHEMATIC FOR EMACHINE T2984

Hi, that machine uses a mainboard found in a few different brand computers. It's called a Seabreeze T3.

This link should be what you're looking for:

http://support.gateway.com/s/MOTHERBD/Intel2/2519274/2519274mvr20.shtml

SOURCE: No Power of a Compaq Presario Computer

Make sure that the power button is conected to the right prongs on the mother board. On the writing next to the prongs it should say power.

SOURCE: AMD sempron power supply

Hi,

I would venture that "shows winfast on monitor" indicates the type of Video Card that your PC is using. Thereafter it should go to POST showing the motherboard, BIOS, memory count and others.

Since as you posted, after Winfast nothing follows, I can only suspect that you have a motherboard problem or at least a BIOS corruption.

Please post back the brand and model of your computer or at least what motherboard.

Good luck and kind regards.

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