Saw some excellent videos about inspecting PS and mobos for damage. So I opened up the PS and examined it very closely. Could not see any sign whatsoever of damaged or leaking capacitors or evidence of overheating or scorching. Same for mobo. I am strongly suspecting the power switch is at fault as I could not get any sign of a connection when I unplugged the 9-pin connector from the switch to the mobo and tested the contacts. Wonder if anyone has found this to be a problem with this machine.
Test your PSU power supply unit or replace it if your power supply units fan is not working your PSU is faulty http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules Only work inside the computer case when the power has been switched off and disconnected. Never open the power source. Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards Remove the memory modules from their slots. Take the opportunity to clean the slots on the motherboards and the memory module connectors. Use compressed air to blow dust away and clean contacts with a soft cloth. Do not use a metallic vacuum cleaner if it touches any component it may create a short and cause damage to the motherboard or other components. Do not use solvent that may attract dust and never poke things like cotton buds in to slots. lightly rub an alcohol (Methylated Spirits) on a cloth not to hard let the alcohol do the work on the copper gold or silver tabs and r Allow the pins to dry. They will air dry in a matter of minutes. If reseating the memory did not resolve the issue try swapping the location of the memory. If you have only one stick of memory in the computer try moving it to another slot and then boot the computer. Check the memory module and memory slot contacts. They are either copper tin or gold. The colour will tell you which they are. Mixing tin and gold can result in corrosion that prevents proper contact. Look for any sign of physical damage to the memory module, memory slots or the motherboard. Reseat the memory modules. You should hear an audible click when they are in place. Do not use too much force to reseat the memory module in to the slot this can cause damage to the module, slot or motherboard. The hardware that you are trying to access is damaged or failing.
The device drivers for the hardware are faulty or incompatible. Could be a problem with the Hard Drive or the Hard drives PCB http://www.onepcbsolution.com/ http://www.youtube.com/watch?v=du0Qd_3wFWM There is a connection problem such as a bad cable for internal hard drives
Test all power and data leads that attach to your hard drive IDE,SATA
the leads from your MOTHERBOARD TO THE HARD DRIVE make sure they have a secure dust free connections and are not faulty or just replace them they could be faulty if its a flat 40pin ide this will be the first to fail Make sure all leads that are attached to your drives dvd\cd and floppy (If Applicable) have secure connections and are not faulty. or just replace them they could be faulty a computer needs power and data to travel through every working device and continue its cycle and have an end so any faulty leads will end up with a computer error
WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules Only work inside the computer case when the power has been switched off and disconnected. Never open the power source. Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards Remove the memory modules from their slots. Take the opportunity to clean the slots on the motherboards and the memory module connectors. Use compressed air to blow dust away and clean contacts with a soft cloth. Do not use a metallic vacuum cleaner if it touches any component it may create a short and cause damage to the motherboard or other components. Do not use solvent that may attract dust and never poke things like cotton buds in to slots. lightly rub an alcohol on a cloth not to hard let the alcohol do the work on the copper gold or silver tabs and r Allow the pins to dry. They will air dry in a matter of minutes If reseating the memory did not resolve the issue try swapping the location of the memory. If you have only one stick of memory in the computer try moving it to another slot and then boot the computer. Check the memory module and memory slot contacts. They are either copper tin or gold. The colour will tell you which they are. Mixing tin and gold can result in corrosion that prevents proper contact. Look for any sign of physical damage to the memory module, memory slots or the motherboard.
Reseat the memory modules. You should hear an audible click when they are in place. Do not use too much force to reseat the memory module in to the slot this can cause damage to the module, slot or motherboard. The hardware that you are trying to access is damaged or failing.
There is a connection problem such as a bad cable for internal hard drives
Test all power and data leads that attach to your hard drive SATA
the leads from your MOTHERBOARD TO THE HARD DRIVE make sure they have a secure dust free connections and are not faulty. Make sure all leads that are attached to your drives dvd\cd and floppy (If Applicable) have secure connections and are not faulty.
Computers need Power and Data to travel through every working device and continue an uninterrupted cycle and have an end so any faulty leads will end up with a computer error.
Could be a problem with the Hard Drive or the Hard drives PCB http://www.onepcbsolution.com/
SOURCE: dell dimension 2350
if you use a flash light and a magnifying glass all the conection pins will be labeled ;like AUX in, for auxillary in which is usually for usb ports and plug and play items, then there will be a power reset set of pins for the reset button, and LED pins, and then your power should be labeled like wise. some times it wont be but you can look at the connector see if it has 3 or 4 wires and find the plug in that matches that has a u shaped metal place by it. its usually the power connection but if you are not sure take it to a professional so you dont cause damage.
SOURCE: dimension 5100 will not turn on
Try checking your Computer Management Services.
I had a similiar problem with a laptop. Just stopped working one day. Could not shutdown because it would not restart without disconnecting power. Could not reboot, because it would not restart without power being disconnected.
Checked Computer Management Services and found some of the services had been turned off.
Try this and let me know if you need more help.
SOURCE: PC will not power up. No fans, lights, anything.
Have you tried a different power cord? (longshot, I know, but it is one of the variables that you don't mention)
Have you tried a different A/C outlet?
SOURCE: SATA 2
Yes!
The good thing about SATA, is that once you plug into a SATA header on a motherboard, BIOS will recognize that device.
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