Question about Dell Dimension 5100 (D51L1) PC Desktop

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System turning completely off for no reason then rebooting automatically

Hi my dell dimension 5100 is turning on and off automatically for no reason. It powers completely off and then reboots back on automatically. I brought it to a computer repair place and the guy took it apart then put it back together and said hopefully that works. well it didn't. I spent two hours on the phone with a tech from dell and he came to the conclusion that it is a motherboard problem. I guess my question is does this sound reasonable and if so is it worth it for a computer that is now 3 years old.

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  • MosschopsUK Apr 02, 2009

    System turning completely off for no reason then rebooting automatically - even in SetUp!



    I've tried everything here - removed all components so just the MB is connected to board, still reboots when in SetUp (BIOS) - the furthest I can get the damn thing to go is to the Windows start-up screen, then reboots. Even tried different PSU and RAM. I'm at a loss - is the CPU or MB screwed?

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Hello,

That kind of problem is very common to all computers. There are three possible causes. the power supply got shorted, The memory got dump and cannot resist to load the operating system. The system got conflict both the hardware's and software's.

solution:

1. try another functional power supply or test your power supply with appropriate tester.
2. REmove and clean the memory both the bank and the chips and test. if same problem occur then try another functional memory.
3. last; format and reinstall the hard drive to renew and refresh all setting and install all the drivers.

if these solution won't work that the time that the motherboard got shorted. however if in the first boot the system display it bios then that can be resolve.

tell me if ever what happen.

melnavz


Posted on Oct 19, 2008

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First disconnecting the power cord and re-seat all connections (Keyboard, Mouse espercially). Connect up the power cord and try powering the PC.

To help you troubleshoot a problem, Dell Dimension 5100 has four diagnostic lights labeled "1," "2," "3," and "4" on the front panel. When the computer starts normally, the lights flash. After the computer starts, all four lights display solid green. If the computer malfunctions, the color and sequence of the lights identify the problem.

If the computer failed to start up check the diagnostic lights color and sequence and Check the link below for more info (Assuming you have another system that can access internet)
http://support.dell.com/support/edocs/systems/dim5100/en/sm/tshoot1.htm#wp1120147

Alternatively, contact Dell Support with the diagnostic lights color and sequence to raise a service call if the system if under warranty.

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