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Re: slow, overheating, shuts itself off
Sounds like your internal fans are taking early retirement, from all the symptoms..like running a car with no oil, you don't want to run a dell desktop without internal cooling..need to replace that fan..not too hard, actually.
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Sounds like a bad power module. It's very common. Also, a PC has a thermostat that starts and stops a cooling fan. If the Fans don't run the PC will overheat and shut down.The interior is probably dirty. Use a compressed air bottle and blow out all the dust especially off the main motherboard. I had a similar problem but the PC stayed on for about 20 minutes before shutting down. A good cleaning solved the problem. Bad power modules are very common and I'm inclined to think that is your problem. Nonetheless, a good cleaning may help and is an inexpensive option.
It seems that your system is overheating so follow these instructions first - Make sure your Heat Sink is placed properly above the processor - Clean the Processor fan, Heat Sink and other peripherals - Use High Speed fans - Use CPU Heat Sink Paste in the processor - Make sure your dint restrict the speed of CPU fan - Shut down your computer atleast two hour a day If you are unable to perform above tasks then use a single utility tool like PC Fresher that will fix windows errors that cause of overheating
Overheating When the CPU overheats then it will shut down (i.e. thermal overload) and won't boot up again until it has cooled down. If this is the problem is not fixed then the CPU will eventually fail. A faulty fan causes the problem or the fan and heat sink assembly are clogged with dust. Check the CPU fan to see if it spins freely, if not replace the fan. If the fan and heat sink is clogged with dust the remove the dust and make sure the vents are clear and dust free. Use a small brush and can of compressed air to do this.
OverheatingWhen the CPU overheats then it will shut down (i.e. thermaloverload) and won't boot up again until it has cooled down. If this is theproblem is not fixed then the CPU will eventually fail. A faulty fan causes the problem or the fan and heat sink assembly are cloggedwith dust. Check the CPU fan to see if it spins freely, if not replace the fan. If the fan and heat sink is clogged with dust the remove the dust and make surethe vents are clear and dust free. Use a small brush and can of compressed airto do this.
How long is shortly? If it runs and brings up the Windows Desktop and
you are allowed to work for 10 minutes or longer then it shuts down,
most likely the laptop is overheating. One way to tell if it is
overheating is to immediately try to turn it back on after it shuts off.
If it will not boot back up, it's overheating. If you let it sit and
cool off for a while, then try to boot it back up and it does it
successfully, it's overheating.Causes of Overheating:1) Dust all inside
the computer. Fans clogged with dust, dust around the vents.2) Fan not
working 3) The Thermal Past around the CPU has dried up or is too thin
the keep the unit cool.When you plug in the power cord is there any
lightswhatsoever on the laptop, where the plug goes in or on the AC
Adapter of thepower cord?
When you press the power button do you
hear fans running, hard drive spinning,lights on the computer, hear any
beeps or lights constantly blinking, hear theDvD/CD drive click and the
light on the drawer of the DvD/CD turn on for asecond or two? If so the
laptop is trying to boot or may have booted, butthe screen is not
showing for some reason.
Beep tones and blinking lights tells the
technicians what is going on with thelaptop and why it is not booting.
Most times it's a motherboard issuewhen you hear beeps or blinking
Sounds like you are overheating. One way to tell if it's overheating is you say it will run for about 30 minutes then shuts down. When it shuts down try rebooting to see if the boots successfully. If it fails to boot successfully right after it shut down then you are probably overheating. If you wait awhile to let it cool down for 30 minutes or so and if you reboot and it does it successfully you definitely have a overheating problem. If I remember correctly all those compaq sr series have loud and fast running fans. Computers overheat because of three reasons for the most part: 1) A fan has stopped working. 2) The Thermal Paste on the CPU and Heat Sink has dried up or is not thick enough to keep the unit cool. 3) Dust has clogged the fan vents and inside the computer. Fortunately for you desktops don't have to be completely disassembled like laptops to get to the fan, CPU and heatsink. Just pop the case and you'll see the components attached to the motherboard
During when does your computer shutdown? Please check the diagnostic lights at the back as well which ones have light on it during the time it would shutdown.
Since you said that the light is blinking yellow it just says that your power supply is running outside its normal operating range. So most likely you would need a change of power supply. Maybe a higher wattage would be better.
I am not totally sure if this is the problem, but I would suggest that you may have a power supply issue or possibly it going out. If the computer runs fine, and then shuts down, than this can be more symptomatic to a overheating issue.
In my limited experience with overheat issues, the computer actually smelled like it was getting hot, and then it would slow down and then sometimes stop. Most computers have fail safe settings where they either alarm, or shut down or both when they overheat.