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I would first make sure everything is plugged up correctly.
If this doesn't work I would look into the power supply inside the computer and having it replaced. other than that I'm not sure how to help.
If you have any other questions or info feel free to respond and ill see if i can help
Hello Wiryan =) Sounds like either a power supply or graphics card issue to me. You could try downloading Almico's speedfan to check your temperatures just to be sure that they are fine. You should contact Dell, they can probably troubleshoot the issue pretty fast/send a technician to you. The X51 randomly shutting down is a common issue if you check the forums over there. http://en.community.dell.com/owners-club/alienware/f/3746/t/19437557.aspx?PageIndex=1 I assume you have updated every driver to the latest? Hope this helps! :)
Once the set shuts down, wait for the unit to stop blinking. Once it stops hold in the input and menu buttons for 5 seconds. The TV will then give you an error code. A 6-1 or a 1-8 error code would indicate a bad Color wheel. Which I think is the problem you have.
I had this problem and was about to send it back to Roland but tried a Factory Reset . It managed to fix it self but it has happened again so I woul dbe interested in finding a more perminnat solution .
Did you fix the probolem?
That beeping noise may be due to over heating. Most machines today have a temperature setting that will turn the machine off once the temperature reaches a certain point. Safety feature to avoid damaging your cpu and components. The shut down and restarting allows the CPU to cool down briefly. Thus allowing you to start the machine again. Usually it will shut down again once the temperature threshold is again reached. Good test is let the machine sit for 30 min. If it immediately starts up and shuts down a few minutes later. Heat build is usually the problem.
Typically this is due to heat sink or Fan on the computer CPU. Check to be sure both are connected to the CPU and functioning. If you have a fan on top of the heat sink above the CPU. Make sure it is working correctly. Dust build up over time will eventually kill the fan bearings or reduce airflow. Heat sink can and will become clogged with dust also. Replacement fans are easy to find. Heat sinks are even easier to clean. Depending on your machine and CPU position replacing the fan can be a challenge. But can be done in a few minutes with minimum tools.
Each bios has different post codes and it is difficult to tell what is happening with out knowing the bios of your particular machine. Listen for the beeps and check your computer manual. You can also google for this. Here is a web site that lists a few bios P.O.S.T codes. http://www.computerhope.com/beep.htm Once you know the beep sequence you can look it up. Usually points to the problem and you can go from there.
Before getting the fan replaced you may want to try to blow the fan with an air compressed duster. Worked for me. You do not need to take the laptop apart completely. There are 4 screws that holds the keyboard in place, unscrew the 4 and you should be able to pop the keyboard out. Once the keyboard is off you should be able to clean the fan.