PC keeps shutting down with no reason

[04streetfire]

I have a Mother Board MCP61PM-HM installed. The Power Supply that is installed is made by Delta Electronics
model # DPS-460DB A .The Hard Drive I have installed is made by Seagate model Barracuda 7200 500 Gbytes . I have the Hard Drive plugged into SATA 1 (black) . I have a Crucial Ram CT25664AA1067.16FHZ 2GB 240-PIN UNBUFF DIMM 256MX6 Plugged into DIMM 1 (black) . I have Windows 7 Ultimate 64-bit . The problem is it shuts off ramdom. Sometimes it will shut down in a few seconds other times it might be on for five minutes. If anyone could help me out I would greatly appreciate it. I am trying to get this pc running so my 4 year old can use ABCMouse.com . I already tried a new PSU. I tried to download CoreTemp to see if it is getting too hot butmost of the time it wont stay running long enuff to install it. I tried reseating the CPU . Also I am usuing the on board video on motherboard. I can leave the PC off overnight then try to start it up usually within 5-10 seconds it shuts down. Every now and then ive got it running for 10 minutes. At this point I don't know what to do.Thanks In Advance MATT

 

[TVeblen]

Now when you say it shuts off you mean it completely powers down right? No lights, no fans, Off.

If that is correct then there are a couple of possibilities:

• The power supply (you say you replaced it but with what?)
• The motherboard- if it is defective it can cause problems like this
• Loose connections, faulty switches (see below)
• CPU overheating (most CPUs have circuit breaker protection - reach the overload temp = power off)

The power supply has 3 points of failure: the wall socket or power strip you have it plugged into, the power supply, and the motherboard connections. You must double check those connections and be sure you have compatible sockets.


The CPU overheating usually takes more than 15 - 20 seconds. is there a CPU fan installed? Is it running?


Check all your connections. To rule out a faulty case switch, disconnect the case switch and reset button leads from the motherboard and start the computer by touching the 2 switch leads together with the blade of a small screwdriver.


After checking all those usual suspects you could do a basic diagnostic:
The Test (power off, power cord unplugged):

• Disconnect everything externally connected except the mouse and keyboard (printers, USB devices, etc). If you are not using a wired mouse and keyboard see if you can borrow one. The wireless device is just another component you have to deal with.
• Disconnect the power and data cables from all the drives inside the computer (Hard drives, DVD/CD drives, etc).
• Remove all the cards installed in the expansion slots (PCI/PCI-e) including the video card. (Be careful handling them and place them on a non conductive surface while testing).
• Remove all the RAM sticks (same rules as above).

Now connect the power cord and turn the PC on.

• The motherboard should start beeping. You should get a beep code that tells you there is no memory. This is good, it means the processor is functioning and the motherboard is good so far.
• Now add one stick of memory in Slot A1 and power on. More beeping: "no video card" beep code. This is good.
• Then add the video card and connect it to the monitor. You should get no beeping and you should see the BIOS start screens, ending with the message that there is no boot device.
• If you get no video then switch the one memory stick installed for another one and test.
• If you do get video then start adding components back, one at a time, until the system fails to boot. The last component you added is then the problem component.

In your case you want to run the system in each step long enough to satisfy yourself that it is running longer than it usually does before it shuts off.
Let us know what you find out.

 

[04streetfire]

Ok i installed a new PSU called Rosewill HIVE Series HIVE-550 550W Continuous @40°C, 80 PLUS BRONZE Certified, Modular Design, Single +12V Rail, ATX12V v2.31/EPS12V v2.92, SLI Ready, CrossFire Ready, Active-PFC Power Supply. It stays running now, but i get a Windows has recovered from an unexpected shutdown. the log file is Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033

Additional information about the problem:
BCCode: 1a
BCP1: 0000000000041284
BCP2: FFFFF980068B9001
BCP3: 0000000000000000
BCP4: FFFFF780C0000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\030813-23977-01.dmp
C:\Users\Mathew\AppData\Local\Temp\WER-40435-0.sysdata.xml

I Will attach a Dump File & Sysdata File and Let me know what you think

 

[TVeblen]

If this problem event came up after you replaced the power supply and the machine would stay running then it is to be expected. The machine was powering off without shutting down properly and we know why. So it can be ignored and you can move on.

If this is an problem event that occurs every time you turn on the machine after replacing the power supply then that would be a different problem altogether.