PC won't boot, power LED on but, can't power up

I've tried everything and at this point I think it's my power supply.
I came home yesterday and my PC was off (it was on when I left). I noticed the power LED was on (steady, not blinking) but, none of the switches would work. I tried unplugging the PS and letting it sit for awhile and then trying it again but, again it wouldn't boot and the power LED just stays a steady green.
I only have 18amps on my +12V rail could this be the problem? See my signature for complete specs. I'm running an Antec Silent Power 350w PS (it came with my Antec SLK2650 case).
Any thoughts?
P.S. What does a solid power LED light indicate? I couldn't find info on this anywhere.

I just ran out and bought a new power supply with 26A on the +12V line. It was an Antec True 430 or something like that. Nothing happens still. The green light indicating power lights up and stays on but, nothing turns, no fans, no hard drives, nothing. I'm thinking at this point it's the motherboad ... again!
Oh, just in case I checked to make sure the board was grounded correctly everywhere and it was, I'm guessing something got shorted on the either the ATX 12V line or the bigger power line that goes to the motherboard...
Oh well, no more MSI for me guys, they just don't want to cooperate with me.

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This is a phenomenon of these computers.
If you have a computer that won't boot, remove battery, unplug charger. Press powerbutton for at least 20 seconds, insert the power cable, and hold for another 20 seconds. Nothing will seem to happen. Then press power again.
Your LiION battery is close to end of life. Replace. Or get used to doing this. Diag software will warn for failed battery. You will also have a ton of BIOS messages about an obscure error occuring. But you need to have a working Diag partition to make some sense of the meaningless error reported in BIOS.
This has nothing to do with the RTC/NVRAM backup. But it's no reason to not replace it. It costs about 3$ and you can find a 2032 Lithium cell almost everywhere. (3V, 20mm diameter, 3,2mm thick). Located under the harddrive bay cover on the bottom of computer.
If no boot occurs, check that the "lid closed" switch is working. In some environments they can get stucked in "Lid closed" position.
Also if you have access to a can of compressed air (duster), clean the airflow / cooling part from accumulated dust.
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My ipod touch 2nd gen 8 gb won't boot! (I did hold home and power)

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Try:
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Hi, my Lenovo T410 laptop won't start. I hit the power button and it looks like it's about to boot up. The thinklight blinks on as normal, the cd drive is checked, the caps lock button blinks on, then nothing. No display, and keyboard is unresponsive. Power light remains on; if I leave it a while the fan comes on. I can turn the machine off using the power button, but the problem remains next time I switch it on.
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Go to Solution.

Hi, Fn+F7 didn't do anything.
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Quote from: Juank1 on 10-April-11, 10:26:37
umm have you connected the power cable for CPU? sounds rare question for me, sorry .. All I know is CPU is seated into socket where get power. Power ATX 24 pin power connector to mainboard is properly connected. or are you talking about ATX 8 Pin power connector JPWR2? is it that?
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Quote
or are you talking about ATX 8 Pin power connector JPWR2? is it that?
yes

XServe won't boot from any drive, but recognizes them in OS X Installer

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MrHoffman wrote:
The EFI firmware, the SMC and possibly the disk I/O path seem good potential candidates for culprit.
Load and run the hardware diagnostics.
Reset the SMC, and reset the LOM.
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beatle20359 wrote:
Hi Jeff,
Do you have the specs of the xserve and the version of OSX server you are trying to install? Does the Xserve have the RAID card installed in it and what size are the drive modules.
All the best
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MacBook Pro won't boot - tried safe mode but it went to black screen after trying.

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T60P w/Docking Station Battery & Power LED's Go out when Power button pushed rem batt to fix

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UPDATE #3
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Genius Bar reservation
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Does this mean my BIOS is out of date?
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May I ask if this is an obligation of them?
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Hi,
It's the second time I try to boot a Linux Live DVD (burnt on DVD-RW), to no avail: the disk spins for a few seconds at several (low) speeds, then the boot reverts to HD. On the contrary, it boots fine from a recovery CD or a Win installation CD (both burnt on CD-RW).
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Imac won't boot; needs repair. But what part to replace?

My iMac G3 tray loading 266mhz will not boot.. i press the power button, the screen makes starting noise and the i can hear the cooling fan.. but the screen is still black and the power light is orange.
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Flyback Transformer
The dark screen and a zapping or crackling sound are classic symptoms of a blown transformer.
There is a test you can preform to see if it is the flyback transformer:
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2. Try to startup the computer with the video cable disconnected.
3. Listen carefully to the iMac. Does it sound like it is starting up? Do you heard the normal hard drive sounds? If so, then your flyback transformer is dead. If you don't hear the normal startup sounds and it shuts down right away, the the problem is something else. Like a bad power supply or something like that.
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