Computer not turning on

Sounds like the the MB is shorted out. Try unplugging everything except the video card, 1 DIMM RAM and CPU. If the system still shorts out, the MB is likely shorted out to the case. Be sure to use brass risers in all the MB mounting holes and reinstall the MB.

*oops double post*

Marcellis22 I appluad you. For one wasting your time posting, and two, wasting my time reading your post.

before you start being a little sarcastic, helpless, and insensitive, realize that I took out the mobo, because its hard to take out the heatsink with a case blocking my way.

Please, any helpful suggestions is welcomed

You state the fans start to spin up when plugging the "ATX" cable. That seems to me you have the power supply plugged into power and on. Bad combination when plugging in cables. 30 years of computer tech/support doesn't make me helpless, but when dealing with people like you I do become sarcastic and insensitive, removing the motherboard to replace heatsink grease is like pulling the car engine to drain the oil...was the CPU overheating? I suspect not, one of your buddies suggested it would be a good idea! Hire a professional next time!

guys.......jezz

is all connecters checked to be in place ? and down properly and you can't screw the board in without the stand offs anyway.

do a minamal boot basic stuff in prerty much try that.

If the fans spin up when plugging in the "ATX" connector, then you might have the power supply connected to the AC outlet in the wall, which may have provided a power surge to the mother board, possibly toasting it... that's all.

Well there appears to have no physical damage, no smoke, no burns or anything like that.

I plugged in everything before turning it on. I used a surge protector, i didnt use it from a outlet from the wall

Breadboard with only the CPU. Short the power pins. If the CPU fan stays on, then you know the motherboard has no short.

Not withstanding marcellis's "helpful" posts on this matter.... Yanno, when someone cuts their finger and says "help me... I've cut myself".... Is the help someone is looking for to tell them they should have been more careful or they should have used a knife that wasn't so sharp???? NOOOOO, I think you should help by trying to stop the bleeding and maybe helping to bandage.

Marcellis... if you truly DON'T want to help someone that is obviously "not as smart as you" cuz you obviously know all.... and so shouldn't everyone else too... right?? Then don't bother to post ANYTHING.

Thank you, my lil rant is finished.

OK... youra6, This is what I would do.

1. Remove MB from case, as you did to begin with.
2. Recheck your HSF to see if it might not be seated correctly. Does it appear to be sitting flat on top of the CPU??
3. Remove and reinstall one stick of memory... just one for now and make sure it is seated properly in its slot.
4. Add your video card if your not using an integrated video port.

5. Place your MB and case on your table "non metal of course". Orient them so you can plug the power cables in from the PSU.
6. With the main power cord from the wall outlet disconnected from the wall or power supply, plug the PSU power connector into the MB. The 24 pin power and the 4 or 8 AUX CPU Power plug if your MB uses that. Also and power connector to the video card if your setup uses that as well.

7. Connect a monitor and keyboard.
8. Connect power to the PSU and turn on the monitor.

9. Now short the power switch pins on the MB. As I don't know what MB you have, I can't say exactly what pins to use. Hopefully you made a note where what wires go where when you unhooked everything from the MB header connector.

Anyway, if your sure as to what two pins go to the power switch on the front of your case, just use a small screw driver to temp short the two pins together.

Let me know what you get.....

the PWR switch pins, it actruly tells you on the mobo and more clearly in the instruction manual. I suppose a paper clip would do or something or screw driver

you done it already?

This really points out to me what an old fart I am; there's a whole generation or two of builders out there who don't have a shoebox full of extra pin jumpers laying around! Back when dinosaurs were using computers, before you could put your lousy modem into your computer (and, probably soon, I'll need to explain what a modem is!), you had to 'shuffle around' a dozen or two shorting jumpers to set its address and interrupt useage; all this stuff has been configured in on-board NVRam or CMOS for so long, that jumpers are museum artifacts!!

Reminds me of the banner my ex put up in the bar where my fortieth birthday party was held: "Put the horses in the wagon; it's all downhill from here!"