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Re: computer desktop problem (CPU)
You need to change your RAM. Get a friend who has experience of computer hardware, to open your computer and take out the sticks of RAM, which you can then take to a Computer store, in order to purchase a replacement. It is necessary to take the sticks of RAM with you, because it important to put the correct type of RAM into the machine, otherwise you can damage your computer irreparably.
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There is a circuit on the motherboard that detects the ambient temperature of your computer. Your CPU fan has 2 speeds - if it detects the temperature inside your desktop getting hot, it will switch the CPU fan to hi-speed. If you removed the memory and powered on the computer and don't hear any Beep codes then you probably have a problem with the the motherboard and it needs to be replaced. disconnect cables to CD/DVDdrives. Look at the USB ports to see if any are damaged.
Here's what to try: Disconnect everything from the motherboard except the CPU and memory. You may leave the video connected to see what, if any, error message you might get. You didn't say if you got any beeps on startup. They can tell you what might be the problem. If this doesn't work, remove the memory modules. The power should stay on but you'll probably get either a steady beep or a bunch of little beeps. (I don't have the Dell error codes close at hand at the moment). If this doesn't work, you have narrowed the problem to one of three things: The CPU, the motherboard, or the power supply. You didn't mention just what happens when you turn it on--just that it won't stay on. Error messages are helpful if you get any on the screen as are any beep tones.
Hi.first pull-out your motherboard in the CPU case then power on without memory only processor installed.if you hear continuous beeping your motherboard is working good. try this beep code means.
No beep means short,no power,bad CPU,loose peripherals. One beep means everything is normal running motherboard. Two beep means CMOS error IC. One long beep,one short beep means motherboard problem. One long beep,two short beeps means video card problem. Three long beeps means keyboard error. Repeated long beeps means memory error. Continuous hi-lo beeps means CPU overheating.
long beep sound is an error code for post. no post means a hardware failure. unplug the desktop from the power source. while its unplugged press and hold the power button for a minute. try to boot up again. if still the same you need to reseat some parts on the inside and might need extra help to do that
*You may or may not see a light on the back of your PC depending on the kind of power supply you have and the exact cause of the problem.(monitor light will likely be amber/yellow if your computer has stopped sending information to it)
*The power lights will stay on, you'll likely hear the fans inside your PC running, and you may or may not hear one or more beeps coming from the computer. If you hear beep sound, check your physical connections to the PC like RAM, Monitor, Cpu, Keyboard.
try to check if the vga cable is properly set. if your using an expansion card try connecting the vga cable to the built-in video card if no go try to check if you have a beeping sound coming from your cpu. if you hear a beeping sound you can try and open the chassis and reset the memory module and also check the video card if it is set properly. if you need help in opening the chassis pls. refer to your user's manual or visit www.dell.us.com.all cautions applies
The one beep is normal . If the fan is not working on the CPU , replace the fan or oil it The CPU can go only a second or so without the fan working. Some models(BIOS )will not allow the computer to start if the fan is not working. Start there.Check out the link below:
If your power supply is bad, there is typically a much cheaper way to fix it rather than purchasing a new one.
If you know a little about electronics or know someone who does have them open up the power supply and check the capacitors. Often times when a power supply goes bad its the result of capacitors going bad.
If you notice on the ends of any capacitors a brownish/whitish discharge or "bulging" then the capacitor has gone bad.
A new one typically cost less than a dollar and replacing it is fairly easy if you know how to solder.
Let me know if you have anymore questions and hopefully if this is the case you can save some money.
I think your cpu is not working, only the fan is working because of the supply of the power in the motherboard. Can you hear some noise or beeping when you open the computer. If you hear the beeping sound maybe the problem is the video card or the memory. Try to remove the video card and insert again to the slot. Remove also the memory and clean the memory slot maybe there is dust block the connection of the memory to the motherboard.