The Mother Board

[Karlsweldt]

Any type of capacitor cannot be properly checked for health while in the circuit, unless you have an expensive test device. Internal faults are not always evident, but when the tops of small electrolytic types begin to bulge or show leakage, they are indeed bad. Their bottoms have a rubber plug to seal them. With internal pressure, the plug can bulge.. and lift the capacitor from the board surface. This also can cause internal connections to break.

Almost all small capacitors are made in China, Japan or Taiwan. Only the highest-quality units may be made by specialist companies for specific uses, elsewhere. You wouldn't want to find "bad caps" in electronic gear on the ISS!!!!!
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F@H.. to solve mankind's maladies.. in our lifetimes!

[bdub]

the eight pin is power to the processor... are you sure you seated the processor correctly? you might want to chek it... make sure there's no bent pins on the board side... the lga should look nice and even.
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[dannydi]

hello I seated thr processor in the slots. my computer was running fine last thursday in the morning and also in the afternoon after work.

I turned it on last thursday surfed the net and while I was looking up something the unit shut down on me and I tried to restart it and it would not start. it would only flash the leds on the board abd in the power supply.

It gets power all through the board the red led glows when you turn it on from the power supply. but when you push the power button on the case or on the board it just flashes the leds. It want to start but will not

but when I remove the 8 pin cable the unit will run but no power the cpu.
every thing runs the video card works fans work also.I also tried a nother cpu same problem as I stated

[bdub]

seems you have it down to power supply or board... can you switch out the psu for something you know is good?
_________________
my main rig...
asrock 970 extreme3
AMD athlonII X3 440
zalman cpns5x performa hs/fan
crucial ballistix 2x4gb sport ddr3-1333
powercolor 3850 256bit/512meg vga
antec neo he 650r
kingston hyperx 3k ssd 120GB
seagate 500GB HDD 32M cache
seagate 750GB HDD 32M cache
hitachi 1TB HDD 32M cache
lg wh14ns40 bd burner
optiarc ad-7240s sata dvdrw (nec chipset)

[cw4cam]

I would try removing the ram sticks, hard drive(s) dvd burner vid card and just have the cpu connected and see what happens.
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"A pessimist sees a problem with an opportunity. an optimist sees an opportunity with a problem."
Winston Churchill

Civilization is invaded by barbarians every generation. (author unknown)

[thecheesehasyou]

I have the same problem. MSI P45 Platinum Manufacture date is Feb '09. Got a Intel Core 2 Quad Q9550 powered by a Corsair TX850. I've got a brand new Corsair HX1050 that I've tested on this board and I get the same symptoms. I've blown the dust off of the board since its been running in my case for atleast 3 years. I inspected and reset the CPU/heatsink, but I still get no boot when all power cables are connected. Remove the 8pin cable to the cpu power and its powers up but ofcourse no post and such.

My conclusion is that the board is toast. I've inspected capacitors and chips but I can't see any visible damage or signs or such. I've already ordered new parts and don't see a reason to get a new board for this CPU due to the age. Going to sell what parts I can.

Good luck and if you have any other results that help or solve this, please share.

-Cheese

[Karlsweldt]

With almost every type of ATX or other modern motherboard, the PSU must present a 'power good' signal to the motherboard sensor before it (the motherboard) will show active signs. This 'power good' signal is a +5 volt level, or very close to that. Too low, and the sensor will not give the clearance to the motherboard circuits to become active. Could be several reasons this signal is either too low or not present.. faulty PSU, excessive power load, or faulty motherboard component (possibly capacitor?). That 'power good' lead is the gray wire at the rear of the main power plug. Use only a digital multi-meter to check the voltage.. an analog type will load the circuit too heavily. The signal is presented within a second or two, after the PSU has stabilized its load to the system.

It is not advised to do so except by a professional, but use a 47-ohm 1 watt resistor to bridge from a +5 volt (red) lead to that gray wire.. and note if the voltage comes to about +5volts. The motherboard should show activity then. But do not keep this bridge in place too long, as there may be a circuit problem elsewhere and the motherboard can be fatally damaged.
_________________
F@H.. to solve mankind's maladies.. in our lifetimes!

[dannydi]

Thank you

I will try to test tat wire I have a dmm

Thanks again.