Computer won't turn on, only power led on.

February 15, 2013 at 14:22:51
Specs: Windows 7, Amd Zambezi 3.1ghz/8gb
Hi! About a week ago i was on my computer and out of the blue it turned off, and wouldn't turn back on after that. I did some reading online and it seemed like it was most likely the power supply, so i replaced it, still didn't turn on. Tried getting a new motherboard and again didn't work. I'm positive the power connectors are in correctly, could another one of my parts be causing this problem? Just to clarify, NOTHING turns on, no fans, only the power led.

Computer build:
Old Motherboard: Biostar A880gz
New Motherboard: Msi 760gm-p34fx
CPU: AMD FX-8120 Zambezi 3.1GHz
Graphics Card: Evga Geforce gtx 550 Ti
Ram: 2x G.SKILL Value Series 4GB 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Desktop Memory Model F3-10600CL9S-4GBNT
PSU: LOGISYS Computer PS550ABK 550Watts ATX12V Power


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#1
February 15, 2013 at 15:14:07
What power supply did you use to replace the old one. It's a possibility that the new one may be underpowered. List the name and model #.

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#2
February 15, 2013 at 15:16:45
Sorry I forgot to put the PSU info. Their the same PSU: LOGISYS Computer PS550ABK 550Watts ATX12V Power

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#3
February 15, 2013 at 15:31:20
CPU failure is a distinct possibility. Only way to tell for sure is to test a known good CPU in your board, and test your CPU in a known good board. I take it you are not getting any BIOS beeps when you try to start up?

Goin' Fishin' (Some day)


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Related Solutions

#4
February 15, 2013 at 15:43:25
I was fearing that >.< Unfortunately this is my only cpu currently, I'll have to buy a new one to test it. No beeps, nothing at all other than the power led. Sometimes i hear a noise like a surge of energy but it's very brief and almost inaudible.

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#5
February 15, 2013 at 16:07:11
Why the same power supply:
http://www.newegg.com/Product/Produ...
It is a cheap one. No PCIe connector, no active PFC, High 5Volt amperage but lower 12Volt amperage (more important). Not high efficiency. Return the new one you purchased and purchase one better. Look at these:
http://www.newegg.com/Product/Produ...
http://www.newegg.com/Product/Produ...
http://www.newegg.com/Product/Produ...

You have to be a little bit crazy to keep you from going insane.


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#6
February 15, 2013 at 20:41:35
Cause im poor, haha. This might be a little off topic but what exactly are the advantages of a good PSU?

So is a bad cpu the only other thing that would cause this?


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#7
February 16, 2013 at 13:45:30
Are you connecting to a power strip or UPS? If so, connect directly to the mains. Perhaps try a different circuit too.

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#8
February 19, 2013 at 13:43:21
I'm using a power strip, everything else works in the plug i use for the PSU. Replaced the cpu and it still wont turn on. Now all i have to do is turn on the PSU for the power light to come on, >.< i'm so confused, could the front panel be broken maybe?

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#9
February 19, 2013 at 14:55:54
I would still try connecting directly to the mains.

Disconnect ALL non essential hardware. Printer, scanner, camera, external, flash drives, memory cards, etc.

Did you bench test the replacement board? Is it certified new or something else?


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#10
February 19, 2013 at 15:56:10
mains? do you mean the wall outlet? I tried plugging it into the wall and it does the same thing. What would be essential? I don't have any of those things in it just the PSU, Motherboard, Memory, CPU and Hard drives. It's a new motherboard, no bench tests.

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#11
February 19, 2013 at 20:36:08
Can we assume that you cleaned off all of the old thermal compound and replaced it with the correct application of new compound?
http://www.arcticsilver.com/methods...

Have you tried momentarily touching a screwdriver to the two posts that the case switch is connected to on the lower front of the motherboard to see if that starts it up?
Is the CPU fan plugged into the proper CPU Fan port on the motherboard? If it is plugged into another fan port, some motherboards will not allow booting without a fan detected on the CPU port. Are you sure that the CPU fan is good?

You have to be a little bit crazy to keep you from going insane.


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#12
February 19, 2013 at 21:53:26
I just left it the way it was with the stock thermal paste. Should i do the screwdriver thing when the computer is on or off? CPU fan was plugged into where it says "cpu fan" tried using the new cpu fan that came with the cpu also, still didn't turn on.

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#13
February 20, 2013 at 07:03:17
You MUST clean off the old paste and apply new according to the instructions for your type CPU. Check on the Artic Silver site to learn what the proper application technique is for your chip. You can use any paste available. Use the same technique.

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#14
February 20, 2013 at 12:23:01
Im using the new cpu and cpu fan, it came with thermal paste already on the bottom of the fan. Is the stock paste adequate? It doesn't matter though right if the computer won't even start >.< ugh

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#15
February 20, 2013 at 14:03:37
If it came pre-applied or had a pad then that is good enough. The problem lies elsewhere.

Did you bench test the board?

Here is a post on how to bench test by jam.

Best way to troubleshoot hardware is to strip it down to the bare mininimum, then go from there. All you need to be able to boot is the power supply, board, CPU w/HSF, ONE stick of RAM, video card (or onboard), keyboard, & monitor...nothing else. All other cards should be removed, all drives should be disconnected (power & ribbon cables), no mouse, no USB devices.


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#16
February 21, 2013 at 21:30:26
Sorry I don't really know how to bench test. Is it easy? I've been turning it on with only the PSU, RAM, CPU, Mobo and Hard drives recently but before when everything was in it the result was the same. Also sorry for the late reply, was really busy the last two days.

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#17
February 22, 2013 at 04:24:55
Did you even read the post directly above. I copied and pasted instructions on HOW to bench test.

If you disconnect all case to board wiring you can easily have the board setting on cardboard or the foam it came shipped with. Lay the case on its side. Place cardboard over opening with ONLY the 24 and CPU power connectors. Short out the two power switch pins with a screwdriver.


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#18
February 22, 2013 at 16:54:58
Oh, Sorry! I read it I just got confused >.< silly me. Any way things have changed, now fans are turning on and seems like everything is getting power, but there's still no signal to the monitor and it makes one beeping noise. Should I still bench test it?

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#19
February 23, 2013 at 07:40:58
What did you do to make that happen?

Sounds like the computer is now POSTing. Are you using the gtx550 graphics card?

Verify you have the graphics card FULLY seated by removing it and reinserting it. Unplug while doing that.

What connector on the graphics card are you using to connect the monitor? Are you using any adapters?

Your CPU is compatible if you have BIOS version 7641vH6 or newer. CPU has a max. wattage of 125w.

See the 2 links below.

http://www.msi.com/product/mb/760GM...

http://www.msi.com/product/mb/760GM...

My guess would still be the crappy power supply. I think bench testing would still be worth the effort.

The link below is for the specs of a GTX 550Ti. Note the max power draw is 116w which means you must use a 6 pin power connector.

http://www.geforce.com/hardware/des...



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#20
February 23, 2013 at 09:29:30
Okay, forgot to put in the 6-pin xP now its showing on the monitor, but it's saying no bootable device =/ guess I'll have to burn a windows disc or something.

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#21
February 24, 2013 at 08:48:32
Are you trying to boot to a hard drive that has Windows 7 installed on it? If so, are the hard and CD drives SATA or IDE?

Are you sure you have both the power and data cables connected? Are the controllers enabled in the BIOS?



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#22
February 25, 2013 at 08:24:37
Yeah it has windows 7. Hard Drives are SATA, CD drive i'm not sure it's a usb cd drive.

All Connectors to the drives are connected including the power and data cables. What are controllers?


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#23
February 25, 2013 at 10:47:53
Controllers are the chips on the motherboard that allow the drives to work or not. There are settings in the BIOS to enable/disable them.

Do you have a Windows 7 disk? If so, what type is it? full version or restore type?


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#24
February 26, 2013 at 11:08:03
It's working! I have to bring the boot menu up to start it, other wise it just sits there. How do i get it to boot from that Hard drive by default so i don't have to open the boot menu everytime?

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#25
February 26, 2013 at 14:08:18
Post the text of the boot menu screen. Write it down if necessary. Sounds like you may have Windows installed twice.

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#26
February 27, 2013 at 22:59:33
Please select boot device:
SATA: 3M - ST3360320AS
SATA: 4M - ST3360320AS
2.2 TB Infinity

Is that normal?


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#27
February 28, 2013 at 05:02:27
Do you have more than one hard drive installed in this computer? If so, are they identical models?

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#28
February 28, 2013 at 19:50:22
Go into your BIOS. Select only the hard drive that has your OS on it and make that one bootable and all other hard drives not bootable. Then go to your boot order and make sure that the CD/DVD drive is first and the hard drive is second and nothing else is listed. Save Changes and Exit.
If there is still any boot confusion, run msconfig and look at the boot tab. Only one instance of Windows should be there unless you installed multiple times and/or on multiple drives. remove or disable inactive ones (you can get help removing them later), Apply and restart the machine.

You have to be a little bit crazy to keep you from going insane.


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#29
March 3, 2013 at 10:41:28
I opened the BIOS but couldn't find out how to make the one hardrive bootable. There's like 12 menu's, could you tell me where specifically to look? The hard drives are the same, SeaGate Baracuda. I opened the msconfig and theres only one windows installed.

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