Desktop presario S4200nx won't boot up just beeps! when it did boot a few minutes later it ould shut down try to reboot but beeps!

More than likely its referring to the PROCESSOR fan, notice the fan on the heatsink the cools the processor,, Thats bad, or the heat sink needs cleaning.. Clean the heatsink first and if that fails replace the fan.

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

3 Beeps is usually a RAM issue. Try re-seating your RAM in their slots and rebooting.

sounds kinda like a memory shut down code beeping or hardware shut down take side off and start unplugging hardware devices 1 at a time and try rebooting until it starts up

1st take memory sticks out and just put 1 of them back in a slot at a time and see if it will boot

is the processor fan spinning and dose it get to full speed because it sound like its over heating and shutting down

It is possible that the memory sticks(RAM) are busted or cannot be read anymore. If you have multiple memory sticks, try isolating the damaged memory stick by using 1 memory stick at a time and try starting your computer up. Once you have found the busted one, try replacing it with a new one.

Hope this helps!

Once try to Re-Install your Operating System and Just after Installing your OS just once Mo niter your CPU usage in Task Manager if it is Simply raising to 80% to 100% then it is a issue of over heating

This could be a couple of things, overheating may cause it to randomly shut down, but if it freezes up on you then it could be a motherboard issue or memory. When you boot up your computer, does it beep at you at all? More than 1 beep signifies a problem. Right click on the my computer icon and click properties, see how much memory it says you have, does that number look accurate? A bad memory module could cause similar problems. A bad motherboard would, in my experience, more often freeze when you first boot up.

Sounds like the power supply or motherboard is biting the dust. U may consider power off, open case and clean out the dirt, check U'r connections and if the power supply smells, replace it.
Else replace the pc. When the power supply dies, it usually stresses the motherboard out and it dies later, sooner.

Hi,

Most Compaq desktop that exhibits 1 long never ending beep indicates Memory error; Bad RAM. Corrective measure therefore would be replace and test.

You can try removing the memory and cleaning the gold pins with a pencil eraser and try again. If this doesn't work, guess you're back to replacing.

Good luck and kind regards.