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Thread: PC black screen of death and freeze HELP!

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    Angry PC black screen of death and freeze HELP!

    My computer specs are as follows: -

    System- Dell Inspiron 545MT
    Operating System- Windows 7 home premium 64 bit
    Motherboard- N826N DG33M06 SOCKET 775 LGA775
    Pcessor - Intel Core 2 Quad Q8300 2500 MHz Kentsfield
    Ram- 2GB. one stick 2GB DDR2-800 (PC2-6400) 240-pin
    Hard disc- one Regular SATA
    Optical drive- one DVD-RW/DVD+RW Drive
    Card reader- one front bay card reader
    Fans- one regular 80mm processor fan and one regular 92mm case

    I have been faced with a crash two days back where the monitor suddenly went in sleep mode with the system board unable to detect RAM. The system board started giving the RAM not detected beep codes. There was no power to the back ports it was a complete crash. I then waited for a few minutes and then turned on the PC back. The PC almost hanged again on boot but came back again on the windows start logo.

    I had installed and uninstalled a few software on that day so the system had gone through medium strain and load but they were all safe as detected by my antivirus. I still took it as a bad virus and reinstalled Windows.

    Today again the computer froze when I was downloading antivirus. Before the freeze the task bar glass color changed to a lower resolution then when I moved the mouse cursor the glass color came back to normal with the system going through a burp of small load on CPU and RAM for a second and then it froze.

    I then restarted the computer. It worked fine till a few hours then suddenly the mouse stopped getting power while the keyboard and everything else worked fine. I then put the mouse on another USB port and it started working. I then put it on the previous port and it was working fine there too.

    Can you please help in detecting as to why my computer is experiencing these hangs and freezes.

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    Could be a lot of things but most likely candidates are the motherboard and the PSU. Followed by RAM, HDD, onboard video etc.
    You have to test or take it somewhere they can test the system.

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    I need to test the motherboard and PSU. Does any one know of any good computer testing equipment I can buy.
    Last edited by Captain rainbow; 08-13-2015 at 03:53 PM.

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    Can a bad or damaged system board damage a good power supply.

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    Quote Originally Posted by Captain rainbow View Post
    Can a bad or damaged system board damage a good power supply.
    Personally I've never seen that (at least, providing the PSU has OCP), but who knows...
    Best, Luca

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    My power supply has the following protections :- Over current, Over temperature, Over power, Under voltage, Over voltage, Short circuit, No load.

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    Quote Originally Posted by Captain rainbow View Post
    My power supply has the following protections :- Over current, Over temperature, Over power, Under voltage, Over voltage, Short circuit, No load.
    So, with OCP (Over current protection) and Short circuit protection it should be safe (and sound).
    Best, Luca

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    I want to test the power supply with a digital multimeter and perform the back probing test while the power supply is providing power to computer. But my system board and CPU are defected. Is it alright to test power supply like this under this situation. Will I be able to get proper readings.

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    Yes, you should likely be able to do that: in case, you may add some dummy load as, for instance, a 12V DC fan on a molex connector, or an old/spare optical disc drive to the SATA cable.
    Best, Luca

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    It's probably useless to check with a multimeter, voltages are probably OK, but that doesn't mean the PSU is. I never find it really useful to check with a multimeter if the PC and PSU still works the multimeter will tell you the PSU is OK, but the ripple can still be way out of spec.

    I would check the capacitors in the PSU, on the motherboard, check S.M.A.R.T. with Crystal Disk Info, test the memory with Memtest86+, etc.

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