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PC boots for 1 second then shut offs , also not getting any picture

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June 4, 2009 4:19:45 AM

Hi i just baught a new CPU amd phenom 2 940 BE 3ghz , 4gb corsair 6400 DHX memorys ( added to my 2gig same kind) and new WD 640gb 32mb HD .
Now to my problem i tried installing all components , pc booted for 1 second fans run etc but then would not boot at all. i tried mixing with the cables abit and i made the PC able to boot somehow but wasnt getting any picutre from the monitor . so i tried so far too use only 1 memory , using my old CPU , other GFX , reseting bios . and just recently i took out the whole motherboard and plugged everything in again and now im back to start where it boots for 1 second and after that wont boot at all. i will try with my brothers Power supply but im guessing its a Motherboard problem? before i installed the new stuff i had another problem with windows not loading properly after installing drivers and stuff , i had to reset the battery to make it boot otherwise it would take 1 year to get one windows bar loaded , not sure if this is realetd to my new problem but anyway..

very grateful for any help!
June 4, 2009 9:05:27 AM

Anyone who can help me? i tested with another power supply and booting works , but im still not getting any screen!
June 4, 2009 1:17:18 PM

You did check to be certain that your mobo/bios does support your new cpu???:) 
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June 4, 2009 7:28:59 PM

Yes i checked that it supports the new cpu , ive tried with my brothers Powersupply same thing no screen. and sometimes the pc wont boot at all.
June 4, 2009 8:09:25 PM

Checked all that basicly , anyway like i said it boots up sometimes now and sometimes not at all.the main problem is that im not getting any screen =/ .
June 4, 2009 8:27:48 PM

That's a very common problem. That's why I posted the checklist. If you go through every step in the entire checklist it's very likely that you'll solve your problem. The most common causes of no picture on the screen are forgetting to plug in the 4/8 pin CPU power connector and RAM problems. You said you tried 1 stick of RAM. Did you try each stick individually in each RAM slot? I'm not going to throw darts trying to find your problem until you go through the entire checklist.
June 4, 2009 10:26:36 PM

Yeah ive tried the diffrent rams in diffrent slots , even tried with my brothers and like i said earlier it didnt help . and yes i have just double checked the check list i did all thats on it and more . im probally going to buy a new motherboard tommorw hoping this will solve my problems . any final thaughts before i buy a new motherboard?
June 4, 2009 10:30:13 PM

Did you try taking the motherboard out of the case and breadboarding it to eliminate the possibility of a short?

You haven't posted the complete system specs. It's hard to help when we don't know what we're working with.
June 4, 2009 10:43:54 PM

Yes i did remove the motherboard and reattachthed it. sorry, heres my specs :
Asus M3A motherboard , Amd phenom || 940 3.0ghz black edition , 2x 1gig Corsair DHX 6400 , 2x 2gig Corsair DHX 6400, 8800GT XFX , Western digital black 640gb 32mb cache , OCZ 600W game xstream , 1x 250gb hd matrox , LG dvd burner .
June 4, 2009 10:53:02 PM

I don't mean removing and re-installing the motherboard. Breadboarding means running the motherboard outside the case on a non-conductive surface to rule out a short.

I don't think that's the problem, though. There are no Phenom II CPU's on the compatible CPU list. That motherboard doesn't look like it will work with a Phenom II CPU. Looks like Dokk2 was on to something from the start.

http://support.asus.com/cpusupport/cpusupport.aspx?SLan...
June 4, 2009 10:58:48 PM

Even if it dont it doesnt explain why my old amd x2 is not working aswell.
June 5, 2009 2:48:09 PM

Update , i checked the Manual for the Motherboard Contunious short beeps : Power error. what does this mean? everthing boots and all fans run its just that im not getting any screen. Im starting to get desperate here ....
June 5, 2009 3:30:56 PM

It still sounds to me like you don't have the CPU power connector plugged in. It's either a 4-pin or 8-pin power plug located near the CPU socket. It needs to be plugged in as well as the main 24-pin motherboard power connector. There will also be a power connector that needs to be plugged into the GPU.
June 5, 2009 3:49:45 PM

Hi and yes i have double checked this alot of ties i have 1 big pin for the motherboard and 2x 4pins for the extra power thats plugged in , and the pci-e thats plugged in aswell....
June 5, 2009 3:52:57 PM

Have you tried booting with just 1 stick of RAM since you got the new motherboard?
June 5, 2009 3:58:15 PM

Yes doesnt work. also tried putting the motherbord on a box and ran it outside the case same prob

June 5, 2009 4:03:30 PM

Could this be the power supply? im starting to run out of options here and would like to get it fixed before i replace the whole pc and get bankrupt =/.
June 5, 2009 4:08:26 PM

Yes, it could be the PSU. If you're absolutely sure that all the connections are correct and the motherboard is giving a beep code that indicates a power problem then that's the next logical step.
June 5, 2009 4:16:11 PM

Ok thanks i will try buy a new Power supply since where i baught the old the place been out of the system not providing any new parts , but its over 2 years old and stronger can never hurt , could u reconed any good PSU ? sorry but the /\/\ button sees to be stuck on this pc.
June 5, 2009 4:27:18 PM

A quality 500W PSU would work fine for that system. Here's a few to consider if you can find them locally:

CORSAIR CMPSU-550VX 550W ATX12V V2.2 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $99.99 - $30 MIR

CORSAIR CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $97.99 - $10 MIR

SeaSonic S12 Energy Plus SS-550HT 550W ATX12V V2.3 / EPS12V V2.91 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC Power Supply - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $89.99 - $10 MIR

BFG Tech LS SERIES LS-550 550W Continuous @ 40°C ATX12V 2.3 / EPS12V 2.8 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC Power Supply - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $89.99 - $20 MIR

PC Power & Cooling Silencer PPCS500 500W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Power Supply compatible with core i7 - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $79.99

Antec earthwatts EA500 500W Continuous Power ATX12V v2.0 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC Power Supply - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $79.99

The most important thing is to get a quality unit from a trusted name like Corsair, PC Power & Cooling, Seasonic, Antec, etc...
June 5, 2009 4:34:55 PM

Corsair Power Supply 650W TX can get this one locally at a decent price! been checking it out earlier and i think its the same one my brother uses , will this be sufficent if i decide i want crossfire?`since my new board supports it i guess its a option
June 5, 2009 4:39:38 PM

Crossfire = ATI GPU's. You can't crossfire 8800GT's since they're Nvidia. That PSU would power crossfire 4850's, though.
June 8, 2009 10:31:48 AM

Yeah i know that . Anyway everything is working now! i Installed windows 7 and everything boots , runs just fine... no idea what the problem was really. thanks for ur help anyway!
!