My Shuttle has been working perfectly for years, but after being shut down for to month it refuses to turn on. I can turn the power supply on by shorting the green and black wires, but it won't turn on from the front of the case. The cable from the front panel switch to the motherboard is testing OK. Any suggestions would be very much appreciated. Many Thanks Ted
u did not said ur mother board vander name and chipset. because some mother board can not star if CMOS battery expire. remove CMOS battery check it voltage bellow 3V or not if it's voltage bellow 3V then replace it. and try to trun on ur shuttle.
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When the CPU in the computer or laptopoverheats then it will shut down (i.e. thermal overload) and won't boot upagain until it has cooled down. If this is the problem is not fixed then theCPU will eventually fail. A faulty fan causes this 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 withdust the remove the dust and make sure the vents are clear and dust free. Use acan of compressed air to do this.
Replace your PSUthen test all leads that are attached to your hard drive sounds like a faulty lead of some sorts then try replacing all the leads that attach to your hard drive including electrical extensions + IDE,SATA and the ones that attach from your motherboard to hard drive make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty or just replace them they are probably old and faulty because a computer has to have an end to the circuit any fulty leads will lead to no boot up good luck
The Windows Defender Application is the Antivirus Software which will be pre-installed with the Windows Operating System(Windows Vista, Windows 7).
The Computer will always Shut down after any Windows Updates or any Operating System Updates are downloaded and installed.
If you are connected to the Internet and running Windows Defender, the Computer will automatically download the Updates for the Windows Defender Application.
Once the Updates are downloaded and installed, the Computer will prompt for a shut down.
The count down will be for 10 seconds.
After 10 seconds, the Computer will install the downloaded Updates and shut down.
This might be the reason for the Computer to shut down while using the Windows Defender.
If the Computer still shuts down randomly, the issue might be due to overheating.
All the Processors in Notebooks are designed to shut down automatically, if there is any overheating issues.
The overheating issue mainly occurs due to the malfunction of the Cooling fan.
If the Computer shuts down frequently, the issue might be due to the above factors.
It would be better to get the Unit examined at the Service Center.
Hello Cornloh, Hi! it seems to me that the switching elements are not working, you need to check the Power transistor for shorts, and replace the IC (switching IC, usually IP3842). the easiest is to use an Oscilloscope to read/find the pulsing signal.
You supply is fault sensitive. If the supply see and surge, it will shut down and timeout. If you disconnect the unit for 3 or 4 minutes after the power disruption, that should be enough time for the supply to reset. You may want to invest in a UBS or APC, inline with your pc. Hope this has helped.
So, lets say that you have double checked all cables, and everything is plugged in properly. When you hit the power switch on the case, do you hear the computer start then shut down several seconds later? Does the computer refuse to do anything but power a motherboard LED? Also, did the computer (or the person carrying the computer) bump into anything while moving it? The most minor bump can cause many problems.
I would try replacing the power supply with another one from a working PC, but just to make sure that the power supply unit is the problem. If it isn't, make sure all heatsinks are locked down appropriately and making full contact. Other than that, I don't know what you can do.
I think you will find your PSU has gone faulty, they are very cheap these days, I would guess at the PSU and replace it "On Spec" with a similar one. Remove the four PSU screws around by the Fan at back. Unplug it from The motherboard noting connections, can only go one way thogh. Take the PSU to ya local repair shop and get another... put new one in connect up to MB and power up. If ya lucky.. ya solved ya problem. Or better still see if you can test it with another one B4 buying another.